Determination of S^2- in environmental water samples using dual-emission CQDs as ratio fluorescent probe Enhanced Publication

{ "defaultlang": "zh", "titlegroup": { "articletitle": [ { "lang": "zh", "data": [ { "name": "text", "data": "环境水样中S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的CQDs双发射比率荧光测定" } ] }, { "lang": "en", "data": [ { "name": "text", "data": "Determination of S" }, { "name": "sup", "data": [ { "name": "text", "data": "2- " } ] }, { "name": "text", "data": "in environmental water samples using dual-emission CQDs as ratio fluorescent probe" } ] } ] }, "contribgroup": { "author": [ { "name": [ { "lang": "zh", "surname": "张", "givenname": "越诚", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "ZHANG", "givenname": "Yue-cheng", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff1", "text": "1" } ], "role": [ "first-author" ], "bio": [ { "lang": "zh", "text": [ "张越诚（1990-）男，陕西西安人，讲师，博士，硕士研究生导师。2021年于瑞典Malmö University获博士学位，主要从事生化分析与分子诊断方面的研究。 E-mail：YuechengZhang@outlook.com" ], "graphic": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826325&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826327&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826326&type=", "width": "20.03498459", "height": "30.09701538", "fontsize": "" } ], "data": [ [ { "name": "text", "data": "张越诚" }, { "name": "text", "data": "（1990-）男，陕西西安人，讲师，博士，硕士研究生导师。2021年于瑞典Malmö University获博士学位，主要从事生化分析与分子诊断方面的研究。 E-mail：" }, { "name": "text", "data": "YuechengZhang@outlook.com" } ] ] } ], "email": "YuechengZhang@outlook.com", "deceased": false }, { "name": [ { "lang": "zh", "surname": "王", "givenname": "清清", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "WANG", "givenname": "Qing-qing", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff1", "text": "1" } ], "role": [], "bio": [ { "lang": "zh", "text": [ "王清清（1998-），女，陕西西安人，汉族，延安大学2020级分析化学专业硕士研究生在读。E-mail： qqwangcrystal@ 163.com" ], "graphic": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826328&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826330&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826329&type=", "width": "22.10198975", "height": "32.06799316", "fontsize": "" } ], "data": [ [ { "name": "text", "data": "王清清" }, { "name": "text", "data": "（1998-），女，陕西西安人，汉族，延安大学2020级分析化学专业硕士研究生在读。E-mail： " }, { "name": "text", "data": "qqwangcrystal@ 163.com" } ] ] } ], "email": "qqwangcrystal@ 163.com", "deceased": false }, { "name": [ { "lang": "zh", "surname": "马", "givenname": "静", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "MA", "givenname": "Jing", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff1", "text": "1" } ], "role": [], "deceased": false }, { "name": [ { "lang": "zh", "surname": "胡", "givenname": "渭平", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "HU", "givenname": "Wei-ping", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff3", "text": "3" } ], "role": [], "deceased": false }, { "name": [ { "lang": "zh", "surname": "孙", "givenname": "凌波", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "SUN", "givenname": "Ling-bo", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff2", "text": "2" } ], "role": [], "deceased": false }, { "name": [ { "lang": "zh", "surname": "马", "givenname": "红燕", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "MA", "givenname": "Hong-yan", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff1", "text": "1" } ], "role": [ "corresp" ], "corresp": [ { "rid": "cor1", "lang": "en", "text": "E-mail：Mahy6614@163.com", "data": [ { "name": "text", "data": "E-mail：Mahy6614@163.com" } ] } ], "bio": [ { "lang": "zh", "text": [ "马红燕（1966-） 女，陕西延安人，教授，硕士研究生导师，2004年于陕西师范大学获得硕士学位，主要从事发光分析的研究。 E-mail: Mahy6614@ 163.com" ], "graphic": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826331&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826333&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826332&type=", "width": "23.05400276", "height": "29.95100403", "fontsize": "" } ], "data": [ [ { "name": "text", "data": "马红燕" }, { "name": "text", "data": "（1966-） 女，陕西延安人，教授，硕士研究生导师，2004年于陕西师范大学获得硕士学位，主要从事发光分析的研究。 E-mail: " }, { "name": "text", "data": "Mahy6614@ 163.com" } ] ] } ], "email": "Mahy6614@ 163.com", "deceased": false } ], "aff": [ { "id": "aff1", "intro": [ { "lang": "zh", "label": "1", "text": "延安大学化学与化工学院，延安市分析技术与检测重点实验室，陕西延安　716000", "data": [ { "name": "text", "data": "延安大学化学与化工学院，延安市分析技术与检测重点实验室，陕西延安　716000" } ] }, { "lang": "en", "label": "1", "text": "College of Chemistry and Chemical Engineering， Yan' an Key Laboratory of Analytical Technology and Detection", "data": [ { "name": "text", "data": "College of Chemistry and Chemical Engineering， Yan' an Key Laboratory of Analytical Technology and Detection" } ] } ] }, { "id": "aff2", "intro": [ { "lang": "zh", "label": "2", "text": "延安大学医学院，陕西延安　716000", "data": [ { "name": "text", "data": "延安大学医学院，陕西延安　716000" } ] }, { "lang": "en", "label": "2", "text": "Medical College，Yan' an University， Yan' an，716000， China", "data": [ { "name": "text", "data": "Medical College，Yan' an University， Yan' an，716000， China" } ] } ] }, { "id": "aff3", "intro": [ { "lang": "zh", "label": "3", "text": "中材地质工程勘查研究院有限公司，北京　100102", "data": [ { "name": "text", "data": "中材地质工程勘查研究院有限公司，北京　100102" } ] }, { "lang": "en", "label": "3", "text": "Sinoma Geological Engineering Exploration Academy Limite company，Beijing，100102，China", "data": [ { "name": "text", "data": "Sinoma Geological Engineering Exploration Academy Limite company，Beijing，100102，China" } ] } ] } ] }, "abstracts": [ { "lang": "zh", "data": [ { "name": "p", "data": [ { "name": "text", "data": "以葡萄糖为碳源、对苯二胺为氮源，一步水热法合成了新型双发射荧光碳量子点（GP-CQDs），对该GP-CQDs的形貌及光谱特性进行了研究。实验发现，在单一波长λ" }, { "name": "sub", "data": [ { "name": "text", "data": "ex" } ] }, { "name": "text", "data": "=300nm激发下，该GP-CQDs于348 nm和452 nm处有双发射荧光信号。将MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "加入GP-CQDs溶液，GP-CQDs于452 nm处的荧光信号完全猝灭，而348 nm处的信号基本不变。于上述猝灭体系中继续加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "，其于425 nm处产生新的荧光发射峰，相较于GP-CQDs原452 nm处的荧光信号，发射峰位置发生蓝移，且发射峰强度随S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的浓度增加线性增强，而348 nm处的信号无增敏现象。据此现象，以425 nm处的荧光峰为响应信号，348 nm荧光峰为参比信号，可直接构建基于S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "测定的比率荧光传感探针。实验对该探针的构建条件及分析性能进行了优化，当S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "浓度在3.1×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-8" } ] }, { "name": "text", "data": " mol/L ~ 8.0×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-6" } ] }, { "name": "text", "data": " mol/L范围内时，与348nm和425 nm两处的荧光强度比值（" }, { "name": "italic", "data": [ { "name": "text", "data": "I" }, { "name": "sub", "data": [ { "name": "text", "data": "425" } ] }, { "name": "text", "data": "/I" }, { "name": "sub", "data": [ { "name": "text", "data": "348" } ] } ] }, { "name": "text", "data": "）呈现良好的线性关系，检出限为9.41×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-9" } ] }, { "name": "text", "data": " mol/L（3σ/k）。对MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "及S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "与GP-CQDs的作用机理进行了探讨。此方法简单、快速、灵敏度高，用于环境水样中S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的测定，结果满意。" } ] } ] }, { "lang": "en", "data": [ { "name": "p", "data": [ { "name": "text", "data": "Dual-emission fluorescence carbon quantum dots （GP-CQDs） were synthesized by a one-step hydrothermal method using glucose and p-phenylenediamine as carbon sources. The morphology and spectral properties of GP-CQDs were studied. It was found that the GP-CQDs have dual emission fluorescence signals at 348 nm and 452 nm under a single excitation wavelength at 300 nm. When MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": " was added to the GP-CQDs solution， the fluorescence signal of GP-CQDs at 452 nm was completely quenched； however， the signals at 348 nm keep stable. When S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "was added to the quenching system above， a new fluorescence emission peak was generated at 425 nm. Compared with the original fluorescence peak at 452 nm， the peak was blue-shifted， and the fluorescence intensity at 425 nm was linearly enhanced with the S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": " concentration. With the fluorescence peak at 425 nm as the response signal and the 348 nm fluorescence peak as the reference signal， a ratiometric fluorescence sensing probe for S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": " determination can be directly constructed. Under the optimal condition， this method shows a good linear relationship in the range of 3.1×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-8" } ] }, { "name": "text", "data": " mol/L ~ 8.0×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-6" } ] }, { "name": "text", "data": " mol/L and the detection limit was calculated to be 9.41×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-9" } ] }, { "name": "text", "data": " mol/L （3σ/K）. The basic mechanism of the proposed method was further discussed. Moreover， this method can be applied to detect S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": " in environmental water samples with satisfactory results." } ] } ] } ], "keyword": [ { "lang": "zh", "data": [ [ { "name": "text", "data": "硫离子（S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "）" } ], [ { "name": "text", "data": "双发射荧光碳量子点" } ], [ { "name": "text", "data": "比率荧光传感器" } ] ] }, { "lang": "en", "data": [ [ { "name": "text", "data": "sulfur ion" } ], [ { "name": "text", "data": "dual-emission carbon quantum dots" } ], [ { "name": "text", "data": "ratio fluorescence probe" } ] ] } ], "highlights": [], "body": [ { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "1　引　　言" } ], "level": "1", "id": "s1" } }, { "name": "p", "data": [ { "name": "text", "data": "碳量子点（Carbon Quantum dots，CQDs）为准球形零维碳纳米材料" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "1", "type": "bibr", "rid": "R1", "data": [ { "name": "text", "data": "1" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，具有良好的生物相容性、低毒性、高的水分散性、低制造成本和优良的光稳定性等优点" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "2", "type": "bibr", "rid": "R2", "data": [ { "name": "text", "data": "2" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，在生物成像" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "3", "type": "bibr", "rid": "R3", "data": [ { "name": "text", "data": "3" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "、光电子技术" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "4", "type": "bibr", "rid": "R4", "data": [ { "name": "text", "data": "4" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "、纳米肿瘤治疗" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "5", "type": "bibr", "rid": "R5", "data": [ { "name": "text", "data": "5" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "、改性膜技术" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "6", "type": "bibr", "rid": "R6", "data": [ { "name": "text", "data": "6" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "和抗菌活性" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "7", "type": "bibr", "rid": "R7", "data": [ { "name": "text", "data": "7" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "等领域具有广阔的应用前景。CQDs良好的发光性能，使其可作为荧光探针用于分析领域" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "8", "type": "bibr", "rid": "R8", "data": [ { "name": "text", "data": "8" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。但基于单发射信号的探针有来自背景噪声、仪器操作、局部环境变化和传感器浓度变化的干扰，而比率荧光探针具有内在的校正功能，两峰处荧光强度的比值可以避免仪器操作、环境变化等因素的干扰，可修正测试结果" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "9", "type": "bibr", "rid": "R9", "data": [ { "name": "text", "data": "9" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，从而提高测定的准确度和灵敏度" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "10", "type": "bibr", "rid": "R10", "data": [ { "name": "text", "data": "10" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，得到更可靠的数据。但基于CQDs的比率荧光探针，大多需要与其他基团通过偶联、复合进行构建，过程繁琐" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "11", "type": "bibr", "rid": "R11", "data": [ { "name": "text", "data": "11" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。通过实验设计及原料选取，如可一步合成具有双发射峰" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "12", "type": "bibr", "rid": "R12", "data": [ { "name": "text", "data": "12" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "的荧光碳点，通过双峰荧光信号的变化直接构建比率型探针，无疑可使探针的构建更加简便快捷、准确" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "13", "type": "bibr", "rid": "R13", "data": [ { "name": "text", "data": "13" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "14", "type": "bibr", "rid": "R14", "data": [ { "name": "text", "data": "14" } ] } } ], "rid": [ "R13", "R14" ], "text": "13-14", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "是一种天然水体和废水中有毒的污染源，存在于火山喷发、石油和温泉中，对生物具有极高的毒性，可参与许多生理过程，如血管生成、血管舒张、炎症调节、神经调节和凋亡等，阿尔茨海默病、唐氏综合征和肝硬化等疾病都与饮用水中S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的异常水平有关" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "15", "type": "bibr", "rid": "R15", "data": [ { "name": "text", "data": "15" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，因此，建立一种简单、快速、准确检测S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的方法非常有意义。目前，测定S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的方法有IC-MS" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "16", "type": "bibr", "rid": "R16", "data": [ { "name": "text", "data": "16" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "、分光光度法" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "17", "type": "bibr", "rid": "R17", "data": [ { "name": "text", "data": "17" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "bold", "data": [ { "name": "text", "data": "、" } ] }, { "name": "text", "data": "液相微萃取-光学探针法" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "18", "type": "bibr", "rid": "R18", "data": [ { "name": "text", "data": "18" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "、化学发光" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "19", "type": "bibr", "rid": "R19", "data": [ { "name": "text", "data": "19" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "、电化学法" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "20", "type": "bibr", "rid": "R20", "data": [ { "name": "text", "data": "20" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "和荧光法等，荧光分析法具有灵敏、操作简便、结果准确等优势。其中根据CQDs测定S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的荧光分析方法有以葡萄汁合成荧光碳点“开-关”型方法检测S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "bold", "data": [ { "name": "sup", "data": [ { "name": "text", "data": "[21]" } ] } ] }, { "name": "text", "data": " 、基于碳点与银纳米团簇的比率和视觉检测方法" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "22", "type": "bibr", "rid": "R22", "data": [ { "name": "text", "data": "22" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "以及以玉米CQDs为荧光探针直接检测S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "bold", "data": [ { "name": "sup", "data": [ { "name": "text", "data": "[23]" } ] } ] }, { "name": "text", "data": "。但尚未见一步水热法合成双发射荧光CQDs，直接通过双发射信号构建比率型荧光探针测定S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的研究。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "本文以葡萄糖和对苯二胺为原料，一步水热法即可合成稳定的发光GP-CQDs，在单一激发λ" }, { "name": "sub", "data": [ { "name": "text", "data": "ex" } ] }, { "name": "text", "data": "=300nm时，该GP-CQDs于348 nm和452 nm处有双发射荧光信号。实验发现，MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "的加入可使GP-CQDs于452 nm处的荧光信号基本被完全猝灭，而348 nm处的信号不变；在体系中加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "后，于425 nm处产生强的新荧光发射峰，相较于452 nm处原荧光发射峰，发射峰的位置蓝移，但发射峰强度随S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的浓度增加线性增强。据此提出了以GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "为荧光探针，双发射比率型荧光分析直接测定S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的新方法。与文献[" }, { "name": "xref", "data": { "text": "19", "type": "bibr", "rid": "R19", "data": [ { "name": "text", "data": "19" } ] } }, { "name": "text", "data": "]-[22]" }, { "name": "text", "data": "相比(见表S1)，该方法测定S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的检出限较低，灵敏度高。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2　实验部分" } ], "level": "1", "id": "s2" } }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.1　仪器与试剂" } ], "level": "2", "id": "s2a" } }, { "name": "p", "data": [ { "name": "text", "data": "荧光光谱仪 (F-2700，日本日立)；透射电镜 (JEM-F200，JEOL日本电子)；XRD衍射仪 (XRD-7000，日本岛津)；IR光谱仪 (IR Prestige-21，日本岛津)；UV-Vis光度计 (Agilent 8453，美国安捷伦)；瞬态荧光仪 (FLSP920，英国爱丁堡)。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "Na" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "S标准溶液配制：取一定量结晶状硫化钠（Na" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "S·9H" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O）溶解并定容至100 mL棕色容量瓶，摇匀，用碘量法标定其准确浓度后，确定Na" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "S母液的浓度。冷藏（4℃）避光保存，使用时逐级稀释Na" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "S母液，配制不同浓度的S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "KMnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "text", "data": "溶液：1.0×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-5 " } ] }, { "name": "text", "data": "mol/L。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "Britton-Robison（BR）缓冲溶液（pH=5.00）。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "阳离子交换树脂（732钠型）的预处理：取一定量阳离子交换树脂，用水多次清洗，直至试样中无可见杂质，出水澄清；之后，用1 moL/L HCl浸泡8 h，使用时用水冲洗至中性。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "实验所用化学药品均为分析纯，实验用水为超纯水。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.2　实验方法" } ], "level": "2", "id": "s2b" } }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.2.1　GP-CQDs的合成" } ], "level": "3", "id": "s2b1" } }, { "name": "p", "data": [ { "name": "text", "data": "将1.4863 g葡萄糖和1.6223 g对苯二胺（" }, { "name": "italic", "data": [ { "name": "text", "data": "n" } ] }, { "name": "text", "data": "约为1:2）称量至烧杯中，加入25 mL水，溶解后转移至50 mL聚四氟乙烯内衬的高压釜中，放入恒温干燥箱，180 ℃下反应20 h。冷却至室温，使用滤纸除去大颗粒杂质；然后使用0.22 μm滤膜过滤，除去较小的颗粒杂质；再通过透析袋（3000 Da）除去合成中的前驱物。随后，纯化后的GP-CQDs定容至100 mL容量瓶，得GP-CQDs原液，稀释100倍得GP-CQDs工作液，于4 ℃储存。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.2.2　S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的检测" } ], "level": "3", "id": "s2b2" } }, { "name": "p", "data": [ { "name": "text", "data": "取0.30 mL GP-CQDs工作液、1.50 mL pH=5.00的BR缓冲溶液、0.20 mL1.0×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-5 " } ] }, { "name": "text", "data": "mol/LMnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "溶液和一定量Na" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "S溶液于10 mL比色管中，加水定容，室温下反应20 min后，测定其在单一激发λ" }, { "name": "sub", "data": [ { "name": "text", "data": "ex" } ] }, { "name": "text", "data": "=300 nm下，λ" }, { "name": "sub", "data": [ { "name": "text", "data": "em" } ] }, { "name": "text", "data": "=348 nm与425 nm处的荧光强度，并计算加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "后的荧光强度之比（" }, { "name": "italic", "data": [ { "name": "text", "data": "I" }, { "name": "sub", "data": [ { "name": "text", "data": "425" } ] }, { "name": "text", "data": "/I" }, { "name": "sub", "data": [ { "name": "text", "data": "348" } ] } ] }, { "name": "text", "data": "）。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.2.3　水样处理" } ], "level": "3", "id": "s2b3" } }, { "name": "p", "data": [ { "name": "text", "data": "将所得水样依次过滤3次，样品澄清无杂质，然后通过阳离子交换树脂，除去阳离子。随后，移取处理后的水样适量，依据“2.2.2 S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的检测”方法，对实际样品水样中的S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "进行检测。" } ] } ] } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3　结果与讨论" } ], "level": "1", "id": "s3" } }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.1　GP-CQDs的表征与光谱特性" } ], "level": "2", "id": "s3a" } }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.1.1　GP-CQDs的形貌与结构" } ], "level": "3", "id": "s3a1" } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "图1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "图1" } ] } }, { "name": "text", "data": "(a)为GP-CQDs的透射电子显微镜（TEM）表征，观察形貌及大小，发现其为准球或类球形，且分布较为均匀，粒径为8 nm左右。" }, { "name": "xref", "data": { "text": "图1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "图1" } ] } }, { "name": "text", "data": "(b)为GP-CQDs的XRD表征，2θ=20.22°处的峰可归因于无定形态碳，因此GP-CQDs的晶型为无定形碳" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "24", "type": "bibr", "rid": "R24", "data": [ { "name": "text", "data": "24" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，属于高度无序的碳颗粒。" } ] }, { "name": "fig", "data": { "id": "F1", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图1" } ], "title": [ { "name": "text", "data": "GP-CQDs的TEM图 （a） （插图：粒径分布图）， XRD谱 （b）， FTIR （c）和UV-Vis （d）图" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.1" } ], "title": [ { "name": "text", "data": "TEM image （a） （illustration： particle diameter distribution chart）， XRD pattern （b）， the infrared spectra （c） and UV-vis absorption spectra of GP-CQDs （d）" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826334&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826336&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826335&type=", "width": "119.76962280", "height": "101.13048553", "fontsize": "" } ] } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "图1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "图1" } ] } }, { "name": "text", "data": "(c)为GP-CQDs的傅立叶变换红外光谱图（FT-IR），由图可知，3338 cm" }, { "name": "sup", "data": [ { "name": "text", "data": "-1" } ] }, { "name": "text", "data": "处的伸缩振动吸收峰表明CQDs表面存在大量的O-H/N-H，1621 cm" }, { "name": "sup", "data": [ { "name": "text", "data": "-1" } ] }, { "name": "text", "data": "可能为-C=C的特征吸收峰，1516 cm" }, { "name": "sup", "data": [ { "name": "text", "data": "-1" } ] }, { "name": "text", "data": "处可能是-C=O的伸缩振动峰，1272 cm" }, { "name": "sup", "data": [ { "name": "text", "data": "-1" } ] }, { "name": "text", "data": "为C-O/C-N的伸缩振动吸收峰，831 cm" }, { "name": "sup", "data": [ { "name": "text", "data": "-1" } ] }, { "name": "text", "data": "归因于芳环上-C-H键弯曲振动" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "25", "type": "bibr", "rid": "R25", "data": [ { "name": "text", "data": "25" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。此结果表明，CQDs的表面含-C=O、-OH、-NH" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "等亲水性基团，使GP-CQDs有良好的水溶性和稳定性。" } ] }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "图1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "图1" } ] } }, { "name": "text", "data": "(d)为GP-CQDs的UV-Vis光谱图，观察到两个明显的吸收峰，分别位于236 nm和282 nm，236 nm处的吸收峰可能归因于C=C键的" }, { "name": "italic", "data": [ { "name": "text", "data": "π→π*" } ] }, { "name": "text", "data": "跃迁" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "26", "type": "bibr", "rid": "R26", "data": [ { "name": "text", "data": "26" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，而282 nm处的这一弱吸收峰，可能是由于GP-CQD结构中C=O的" }, { "name": "italic", "data": [ { "name": "text", "data": "n" } ] }, { "name": "text", "data": "-" }, { "name": "italic", "data": [ { "name": "text", "data": "π" } ] }, { "name": "text", "data": "*跃迁" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "27", "type": "bibr", "rid": "R27", "data": [ { "name": "text", "data": "27" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.1.2　GP-CQDs的发光性质" } ], "level": "3", "id": "s3a2" } }, { "name": "p", "data": [ { "name": "text", "data": "如" }, { "name": "xref", "data": { "text": "图2", "type": "fig", "rid": "F2", "data": [ { "name": "text", "data": "图2" } ] } }, { "name": "text", "data": "(a)所示，当激发波长λ" }, { "name": "sub", "data": [ { "name": "text", "data": "ex" } ] }, { "name": "text", "data": "=280~304 nm时，GP-CQDs显示两个荧光发射峰，峰位置位于348 nm和452 nm处。随着激发波长的增大，发射峰的位置未见变化，452 nm处荧光强度基本不变，而348 nm处荧光强度随激发波长的增加有所降低，该表明GP-CQDs荧光发射峰位置不依赖激发波长的变化而移动，不具有激发波长依赖性。" }, { "name": "xref", "data": { "text": "图2", "type": "fig", "rid": "F2", "data": [ { "name": "text", "data": "图2" } ] } }, { "name": "text", "data": "(b)为GP-CQDs的3D荧光激发-发射图，更加清楚的表现出该CQDs可以在350 nm以及450 nm附近进行荧光发射。" } ] }, { "name": "fig", "data": { "id": "F2", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图2" } ], "title": [ { "name": "text", "data": "GP-CQDs于不同激发波长的荧光光谱图与3D激发-发射图" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.2" } ], "title": [ { "name": "text", "data": "Fluorescence spectra and three-dimensional spectrum with different excitation wavelengths and excitation-emission map of GP-CQDs" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826337&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826339&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826338&type=", "width": "110.86633301", "height": "49.58201218", "fontsize": "" } ] } } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.2　S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的测定原理" } ], "level": "2", "id": "s3b" } }, { "name": "p", "data": [ { "name": "text", "data": "选择激发波长λ" }, { "name": "sub", "data": [ { "name": "text", "data": "ex" } ] }, { "name": "text", "data": "=300 nm，如" }, { "name": "xref", "data": { "text": "图3", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "图3" } ] } }, { "name": "text", "data": "(a)所示，该GP-CQDs 于348 nm和452 nm处具有双发射峰，MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "的加入使GP-CQDs于λ" }, { "name": "sub", "data": [ { "name": "text", "data": "em" } ] }, { "name": "text", "data": "=452 nm处荧光信号基本被完全猝灭，而λ" }, { "name": "sub", "data": [ { "name": "text", "data": "em" } ] }, { "name": "text", "data": "=348 nm处荧光信号基本保持不变。于上述体系中继而加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "，实验表明，GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系于λ" }, { "name": "sub", "data": [ { "name": "text", "data": "em" } ] }, { "name": "text", "data": "=425 nm处出现了新的强荧光发射峰。" } ] }, { "name": "fig", "data": { "id": "F3", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图3" } ], "title": [ { "name": "text", "data": "GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系对S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的响应（a）及与不同浓度S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "溶液作用（b）的荧光光谱图" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.3" } ], "title": [ { "name": "text", "data": "Fluorescence spectra of GP-CQDS /MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": " system response to S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": " （a） and interaction with different concentrations of S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": " solutions （b）" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826340&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826342&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826341&type=", "width": "124.04901123", "height": "49.32815552", "fontsize": "" } ] } }, { "name": "p", "data": [ { "name": "text", "data": "改变S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "浓度，将不同浓度的S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "加入到GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系后，如" }, { "name": "xref", "data": { "text": "图3", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "图3" } ] } }, { "name": "text", "data": "(b)显示，λ" }, { "name": "sub", "data": [ { "name": "text", "data": "em" } ] }, { "name": "text", "data": "=348 nm处的荧光强度基本不变，而λ" }, { "name": "sub", "data": [ { "name": "text", "data": "em" } ] }, { "name": "text", "data": "=425 nm处的荧光强度随着S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "浓度的增加呈现有规律的线性增强。据此，可以λ" }, { "name": "sub", "data": [ { "name": "text", "data": "em" } ] }, { "name": "text", "data": "=348 nm荧光为参比信号，以λ" }, { "name": "sub", "data": [ { "name": "text", "data": "em" } ] }, { "name": "text", "data": "=425 nm处荧光为响应信号，基于" }, { "name": "italic", "data": [ { "name": "text", "data": "I" } ] }, { "name": "sub", "data": [ { "name": "text", "data": "425" } ] }, { "name": "text", "data": "/" }, { "name": "italic", "data": [ { "name": "text", "data": "I" } ] }, { "name": "sub", "data": [ { "name": "text", "data": "348" } ] }, { "name": "text", "data": "与不同浓度S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "之间的线性关系，构建比率型荧光探针，实现对S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的高灵敏度、高选择性检测。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "在以上相同的实验条件下，讨论了S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "分别与GP-CQDs及与MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "的相互作用，如" }, { "name": "xref", "data": { "text": "图4", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "图4" } ] } }, { "name": "text", "data": "所示。结果显示，GP-CQDs+S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "与GP-CQDs的荧光峰基本完全重合，荧光信号无明显变化；MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "与S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "二者间荧光信号也无明显变化。说明S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "测定荧光探针的构建，GP-CQDs、猝灭剂MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "和S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "三者缺一不可。" } ] }, { "name": "fig", "data": { "id": "F4", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图4" } ], "title": [ { "name": "text", "data": "不同物质结合的荧光光谱图" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.4" } ], "title": [ { "name": "text", "data": "Fluorescence spectra of different substances combined" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826343&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826345&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826344&type=", "width": "69.32099915", "height": "50.00600052", "fontsize": "" } ] } } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.3　测定S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "条件的选择" } ], "level": "2", "id": "s3c" } }, { "name": "p", "data": [ { "name": "text", "data": "为得到最佳的测定效果，对该体系中所用到激发波长（图S1）、酸度（图S2a）、缓冲种类（图S2b）、缓冲溶液用量（图S2c）、GP-CQDs用量（图S3）、MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "用量（图S4）、反应时间以及离子强度进行了优化。实验结果表明：该体系最佳激发波长为300 nm；体系酸度选择加入pH=5.00的BR缓冲溶液1.50mL控制；GP-CQDs工作液用量为0.30 mL；猝灭剂MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": " 加入量为0.20 mL时，该体系" }, { "name": "italic", "data": [ { "name": "text", "data": "I" }, { "name": "sub", "data": [ { "name": "text", "data": "425" } ] }, { "name": "text", "data": "/I" }, { "name": "sub", "data": [ { "name": "text", "data": "348" } ] } ] }, { "name": "text", "data": "达到最大，达到最佳测定条件。室温下，该体系" }, { "name": "italic", "data": [ { "name": "text", "data": "I" }, { "name": "sub", "data": [ { "name": "text", "data": "425" } ] }, { "name": "text", "data": "/I" }, { "name": "sub", "data": [ { "name": "text", "data": "348" } ] } ] }, { "name": "text", "data": "于20 min后达到最大，且在8 h内基本保持稳定；离子强度对检测S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的影响不大。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.4　检出限和线性方程" } ], "level": "2", "id": "s3d" } }, { "name": "p", "data": [ { "name": "text", "data": "在最佳实验条件下，S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的浓度在3.1×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-8" } ] }, { "name": "text", "data": " mol/L ~ 8.0×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-6" } ] }, { "name": "text", "data": " mol/L范围内与体系加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "后荧光强度之比（" }, { "name": "italic", "data": [ { "name": "text", "data": "I" }, { "name": "sub", "data": [ { "name": "text", "data": "425" } ] }, { "name": "text", "data": "/I" }, { "name": "sub", "data": [ { "name": "text", "data": "348" } ] } ] }, { "name": "text", "data": "）呈良好的线性关系。如" }, { "name": "xref", "data": { "text": "图5", "type": "fig", "rid": "F5", "data": [ { "name": "text", "data": "图5" } ] } }, { "name": "text", "data": "，线性方程为" }, { "name": "italic", "data": [ { "name": "text", "data": "I" }, { "name": "sub", "data": [ { "name": "text", "data": "425" } ] }, { "name": "text", "data": "/I" }, { "name": "sub", "data": [ { "name": "text", "data": "348" } ] } ] }, { "name": "text", "data": "=0.59135 " }, { "name": "italic", "data": [ { "name": "text", "data": "c" } ] }, { "name": "text", "data": "（μM）+0.10541（" }, { "name": "italic", "data": [ { "name": "text", "data": "R" }, { "name": "sup", "data": [ { "name": "text", "data": "2" } ] } ] }, { "name": "text", "data": "=0.9974）。方法精密度RSD为1.8 %（" }, { "name": "italic", "data": [ { "name": "text", "data": "n" } ] }, { "name": "text", "data": "=11，" }, { "name": "italic", "data": [ { "name": "text", "data": "c" } ] }, { "name": "text", "data": "=3.0×10" }, { "name": "sup", "data": [ { "name": "text", "data": "-6" } ] }, { "name": "text", "data": " mol/L），检出限LOD为9.41nM (3σ/K)。" } ] }, { "name": "fig", "data": { "id": "F5", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图5" } ], "title": [ { "name": "text", "data": "体系的线性回归方程" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.5" } ], "title": [ { "name": "text", "data": "Linear regression equation of the system" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826346&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826348&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826347&type=", "width": "64.82299805", "height": "53.18099976", "fontsize": "" } ] } } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.5　体系对S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的选择性" } ], "level": "2", "id": "s3e" } }, { "name": "p", "data": [ { "name": "text", "data": "实验考察了体系对S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的选择性，试验了浓度为3 μM的S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "、Ni" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Mg" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、K" }, { "name": "sup", "data": [ { "name": "text", "data": "+" } ] }, { "name": "text", "data": "、Ca" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Co" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Hg" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Al" }, { "name": "sup", "data": [ { "name": "text", "data": "3+" } ] }, { "name": "text", "data": "、Mn" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Ba" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Fe" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Fe" }, { "name": "sup", "data": [ { "name": "text", "data": "3+" } ] }, { "name": "text", "data": "、Zn" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Ag" }, { "name": "sup", "data": [ { "name": "text", "data": "+" } ] }, { "name": "text", "data": "、Cr" }, { "name": "sup", "data": [ { "name": "text", "data": "6+" } ] }, { "name": "text", "data": "、Cu" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Ce" }, { "name": "sup", "data": [ { "name": "text", "data": "4+" } ] }, { "name": "text", "data": "、Sr" }, { "name": "sup", "data": [ { "name": "text", "data": "2+" } ] }, { "name": "text", "data": "、Bi" }, { "name": "sup", "data": [ { "name": "text", "data": "3+" } ] }, { "name": "text", "data": "、F" }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "、CO" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "、NO" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "、Cl" }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "、SO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "、Br" }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "和ClO" }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "对GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系的响应。如" }, { "name": "xref", "data": { "text": "图6", "type": "fig", "rid": "F6", "data": [ { "name": "text", "data": "图6" } ] } }, { "name": "text", "data": "所示，除S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的加入对体系于425 nm处的荧光信号产生影响，其余离子的荧光信号强度的比值均与空白信号相似，几乎不会使荧光强度发生改变。结果表明：相对于其他离子，该比率测定方法对S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "具有高的选择性。" } ] }, { "name": "fig", "data": { "id": "F6", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图6" } ], "title": [ { "name": "text", "data": "不同离子对体系的响应" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.6" } ], "title": [ { "name": "text", "data": "The response of different ions to the system" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826349&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826351&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826350&type=", "width": "63.50000000", "height": "50.79998779", "fontsize": "" } ] } } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.6　实际样品测定" } ], "level": "2", "id": "s3f" } }, { "name": "p", "data": [ { "name": "text", "data": "为了测试探针的实用性，用此方法对延河水和泉水中的S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "含量进行测定。移取经“2.2.3水样处理”后水样适量，按照“2.2.2 S" }, { "name": 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"name": "text", "data": "]" } ] }, { "name": "text", "data": "分别为11.08 ns 和5.11 ns，由于τ/τ" }, { "name": "sub", "data": [ { "name": "text", "data": "0" } ] }, { "name": "text", "data": "不等于1，且加入猝灭剂后使荧光寿命减小，表明MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "与GP-CQDs体系之间是以动态猝灭" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "29", "type": "bibr", "rid": "R29", "data": [ { "name": "text", "data": "29" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "的方式相互作用的。加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "离子以后，荧光寿命缩短至2.51 ns（" }, { "name": "xref", "data": { "text": "表2", "type": "table", "rid": "T2", "data": [ { "name": "text", "data": "表2" } ] } }, { "name": "text", "data": "），说明S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { 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"79.45" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "2.58" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "2.07" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "12.76" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "18.48" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "2.51" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "1.173" } ] } ] ], "foot": [] } ], "graphics": { "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826360&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826359&type=", "width": "162.79998779", "height": "16.64167023", "fontsize": "" } } }, { "name": "p", "data": [ { "name": "text", "data": "其次，对体系的UV-Vis吸收光谱进行了研究。如" }, { "name": "xref", "data": { "text": "图8", "type": "fig", "rid": "F8", "data": [ { "name": "text", "data": "图8" } ] } }, { "name": "text", "data": "(a)所示，实验首先测定了GP-CQDs（黑线），MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "（红线）以及GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "（蓝线）体系的紫外可见吸收。绿线GP-CQDs+MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "是通过对GP-CQDs（黑线）与MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "（红线）的吸收光谱进行简单的加和计算得出的。实验发现，GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系（蓝线）较GP-CQDs与MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "加和GP-CQDs+MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "（绿线）相比，虽吸收峰的位置没有发生明显变化，但吸光度有所增强，光谱发生了变化。静态猝灭会改变物质的UV-Vis谱图" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "30", "type": "bibr", "rid": "R30", "data": [ { "name": "text", "data": "30" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，故GP-CQDs与MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "之间有静态猝灭作用发生。结合荧光寿命曲线，MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "与GP-CQDs之间的猝灭的方式可能是动态与静态方式同时存在的。" }, { "name": "xref", "data": { "text": "图8", "type": "fig", "rid": "F8", "data": [ { "name": "text", "data": "图8" } ] } }, { "name": "text", "data": "(b)为GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "前后的UV-Vis谱图。由图可知，加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "后，GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "-S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "体系于285 nm处的吸收峰与GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系在285nm的吸收峰形有所不同，发生了变化，GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系位于525 nm处的特征吸收峰基本消失，且236 nm处吸收峰的吸光强度有变化，吸收光谱发生了明显变化，说明S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "与GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系之间有相互作用发生。" }, { "name": "xref", "data": { "text": "图8", "type": "fig", "rid": "F8", "data": [ { "name": "text", "data": "图8" } ] } }, { "name": "text", "data": "(c)为MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "、S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "及MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "+S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "体系的UV-Vis谱图，向MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "溶液中加入S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "后，MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "的吸收峰消失；而相较于S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "，MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "+S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "位于340 nm处出现了新的吸收峰，表明S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "与MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "之间发生了相互作用。" }, { "name": "xref", "data": { "text": "图8", "type": "fig", "rid": "F8", "data": [ { "name": "text", "data": "图8" } ] } }, { "name": "text", "data": "(d)为GP-CQDs与S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "之间的UV-Vis吸收光谱图，由图可知，GP-CQDs+S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "与GP-CQDs的吸收谱图基本完全重合，可见GP-CQDs与S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "之间不发生相互作用。" } ] }, { "name": "fig", "data": { "id": "F8", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图8" } ], "title": [ { "name": "text", "data": "GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "text", "data": "/S" }, { "name": "sup", "data": [ { "name": "text", "data": "2- " } ] }, { "name": "text", "data": "体系紫外-可见吸收光谱" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.8" } ], "title": [ { "name": "text", "data": "The UV-vis absorption spectra of GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "/S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": " systems" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826361&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826363&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826362&type=", "width": "99.74800110", "height": "79.63999939", "fontsize": "" } ] } }, { "name": "p", "data": [ { "name": "text", "data": "综上，推测该体系机理可能如下：GP-CQDs表面存在大量的-COOH、-C=O和-NH" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "基团，且呈负电荷性，因此该GP-CQDs具有良好的水溶性与较好的稳定性" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "31", "type": "bibr", "rid": "R31", "data": [ { "name": "text", "data": "31" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。如" }, { "name": "xref", "data": { "text": "图9", "type": "fig", "rid": "F9", "data": [ { "name": "text", "data": "图9" } ] } }, { "name": "text", "data": "所示，于GP-CQDs溶液中加入MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "后，因MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "易得电子，激发态的GP-CQDs与猝灭剂MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "发生电子转移反应" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "32", "type": "bibr", "rid": "R32", "data": [ { "name": "text", "data": "32" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "可以有效的猝灭GP-CQDs在452 nm处的发射。向被猝灭的GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系中加入Na" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "S，S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "离子与GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "发生反应，改变GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系的表面结构，这种结构改变不仅增大了GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系电子由高能态回到基态的能量差，使荧光发射峰蓝移。而且，由于杂原子S的引入，使GP-CQDs-MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": " -S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "体系在425 nm处的发射强度显著增加。因此，可构建 GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "比率荧光探针，实现对S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的高灵敏荧光检测。" } ] }, { "name": "fig", "data": { "id": "F9", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图9" } ], "title": [ { "name": "text", "data": "反应机理图" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.9" } ], "title": [ { "name": "text", "data": "Reaction mechanism diagram" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826364&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826366&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=36826365&type=", "width": "138.37701416", "height": "50.53500366", "fontsize": "" } ] } } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "4　结　　论" } ], "level": "1", "id": "s4" } }, { "name": "p", "data": [ { "name": "text", "data": "以葡萄糖为碳源、对苯二胺为氮源，一步制备了新型发光GP-CQDs，其在348 nm和452 nm处有双发射荧光信号。一定量MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "的加入可使GP-CQDs于452 nm处的荧光完全猝灭，而S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的加入使GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "体系于425 nm处产生新的荧光发射峰，该峰强度随S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的浓度增加线性增强，而348 nm处的信号无增敏现象。据此现象，以425nm处的荧光峰为响应信号，348 nm荧光峰为参比信号，构建了GP-CQDs/MnO" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": "比率型荧光探针，可对S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "进行高灵敏检测，此方法简便、灵敏、准确。该研究为比率型荧光探针的构建提供了新思路，为S" }, { "name": "sup", "data": [ { "name": "text", "data": "2-" } ] }, { "name": "text", "data": "的荧光测定提供了新方法。" } ] } ] } ], "footnote": [], "reflist": { "title": [ { "name": "text", "data": "参考文献" } ], "data": [ { "id": "R1", "label": "1", "citation": [ { "lang": "en", "text": [ { "name": "text", "data": "RASAL A S" }, { "name": "text", "data": "， " }, { "name": "text", "data": "YADAV S" }, { "name": "text", "data": "， " }, { "name": "text", "data": "YADAV A" }, { "name": "text", "data": "， " }, { "name": "text", "data": "et al" }, { "name": "text", "data": ". 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