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Highly Selective Colorimetric Recognition of Copper Ions Based on Bis-Schiff Base Containing An Azoxy Group
- Chinese Journal of Luminescence Vol. 38, Issue 8, Pages: 1109-1116(2017)
- 作者机构：
吉林大学 化学学院,吉林 长春,130026
- 作者简介：
- 基金信息：Supported by National Science Foundation for Fostering Talents in Basic Research of
DOI：10.3788/fgxb20173808.1109
CLC： O657.3;O626.32Received：05 January 2017，
Revised：13 February 2017，
Published：05 August 2017
- 稿件说明：
移动端阅览
吕蕾, 盛野, 郑松志等. 氧化偶氮苯双席夫碱化合物对Cu<sup>2+</sup>的比色识别[J]. 发光学报, 2017,38(8): 1109-1116
LYU Lei, SHENG Ye, ZHENG Song-zhi etc. Highly Selective Colorimetric Recognition of Copper Ions Based on Bis-Schiff Base Containing An Azoxy Group[J]. Chinese Journal of Luminescence, 2017,38(8): 1109-1116
吕蕾, 盛野, 郑松志等. 氧化偶氮苯双席夫碱化合物对Cu<sup>2+</sup>的比色识别[J]. 发光学报, 2017,38(8): 1109-1116 DOI： 10.3788/fgxb20173808.1109.
LYU Lei, SHENG Ye, ZHENG Song-zhi etc. Highly Selective Colorimetric Recognition of Copper Ions Based on Bis-Schiff Base Containing An Azoxy Group[J]. Chinese Journal of Luminescence, 2017,38(8): 1109-1116 DOI： 10.3788/fgxb20173808.1109.
摘要
为得到简便地识别Cu
2+
的传感器，设计合成了氧化偶氮苯双席夫碱化合物。采用紫外吸收光谱法研究了化合物对Cu
2+
的配合作用及对As
3+
、Mo
6+
、Mn
2+
、Zn
2+
、Fe
3+
、Pb
2+
、Al
3+
、Hg
2+
、Ni
2+
、Pt
4+
、Mg
2+
、Be
2+
、Sr
2+
、Cs
+
、Os
4+
、Cd
2+
、Se
4+
、Cr
6+
、Co
2+
、Rb
+
、Ba
2+
、V
6+
、Ca
2+
等23种金属离子的干扰作用。采用等摩尔的连续变化法（Job-plot），研究了化合物与Cu
2+
形成配合物的配比。用红外光谱法研究了配合机理。同时研究了在EDTA存在时，化合物对Cu
2+
的"off-on "性质。结果表明，合成的化合物具有大共轭体系，结构新颖且稳定。化合物可以克服23种金属离子的干扰，对Cu
2+
的选择性很高。化合物与Cu
2+
形成1：1型强发光配合物，可以达到比色（裸眼）识别。在1.32~13.0 molL
-1
范围内，化合物紫外光谱吸光度值与Cu
2+
浓度呈现良好的线性关系，线性范围宽，最低检出限为2.610
-7
molL
-1
。在EDTA存在时，该配合物释放出Cu
2+
，表现出对Cu
2+
的" off-on"模式，红外光谱法研究明确了化合物与Cu
2+
的结合位点。研究结果表明，所合成的氧化偶氮苯双席夫碱化合物可以对Cu
2+
实现简便易行的比色（裸眼）识别。
Abstract
In order to obtain copper ion sensors
a bis-Schiff base containing an azoxy group was synthesized. The complexation effect of the compound on Cu
2+
was studied
and the interference of 23 metal ions such as As
3+
Mo
6+
Mn
2+
Zn
2+
Fe
3+
Pb
2+
Al
3+
Hg
2
+
Ni
2+
Pt
4+
Mg
2+
Be
2+
Sr
2+
Cs
+
Os
4+
Cd
2+
Se
4+
Cr
6+
Co
2+
Rb
+
Ba
2+
V
6+
Ca
2+
was also studied in MeOH-H
2
O by UV-Vis spectroscopy. Job-plot method was used to study the ratio of the Cu
2+
complex with the compound. The cooperation mechanism was studied by infrared spectrometry
and the "off-on" nature of the compound with copper ion was studied in EDTA. The results indicate that the bis-Schiff base has a large conjugated system
the structure is novel and stable. The bis-Schiff base shows a highly selective response to Cu
2+
. A clear color change from colorless to yellow is observed upon the addition of Cu
2+
to the solution of the receptor in MeOH by naked-eyes and a single selectivity colorimetric recognition. The Job-plot shows that the bis-Schiff base coordinates with Cu
2+
to form 1:1 stable luminescent complex. The UV absorbance of the system shows a good linear relationship with Cu
2+
concentration within 1.32-13.0 molL
-1
and the detection limit is 2.610
-7
molL
-1
. The sensing of Cu
2+
by this sensor is found to be reversible with the Cu
2+
induced color being lost upon the addition of EDTA. The process of titrating Compound 1 with Cu
2+
is reversible
and Compound 1 can be used as an off-on switch chemosensor. The complexation mechanism of Compound 1 and Cu
2+
was studied by IR spectroscopy
and the binding sites of compound 1 and Cu
2+
were identified.
关键词
Keywords
references
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