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安徽大学化学化工学院 安徽省绿色高分子材料重点实验室, 安徽 合肥 230601
纸质出版日期:2015-10-10,
收稿日期:2015-6-12,
修回日期:2015-7-29,
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殷芳芳, 朱维菊, 方敏等. 咔唑-硫脲席夫碱荧光探针对Hg<sup>2+</sup>和Ag<sup>+</sup>的可视化识别[J]. 发光学报, 2015,36(10): 1137-1144
YIN Fang-fang, ZHU Wei-ju, FANG Min etc. Visual Recognition for Hg<sup>2+</sup> and Ag<sup>+</sup> of Carbazole-thiourea Schiff Base Fluorescence Probe[J]. Chinese Journal of Luminescence, 2015,36(10): 1137-1144
殷芳芳, 朱维菊, 方敏等. 咔唑-硫脲席夫碱荧光探针对Hg<sup>2+</sup>和Ag<sup>+</sup>的可视化识别[J]. 发光学报, 2015,36(10): 1137-1144 DOI: 10.3788/fgxb20153610.1137.
YIN Fang-fang, ZHU Wei-ju, FANG Min etc. Visual Recognition for Hg<sup>2+</sup> and Ag<sup>+</sup> of Carbazole-thiourea Schiff Base Fluorescence Probe[J]. Chinese Journal of Luminescence, 2015,36(10): 1137-1144 DOI: 10.3788/fgxb20153610.1137.
以3-溴代-N-丁基咔唑和4-苯基-3-氨基硫脲为原料
合成了一种新型含咔唑基的硫脲席夫碱
L
使用紫外-可见光谱、荧光光谱、核磁氢谱以及质谱等对其成分结构、离子识别性能、识别模式进行了研究。结果表明:
L
对Hg
2+
和Ag
+
具有快速响应的可视化选择性识别。当Hg
2+
或Ag
+
加入后
L
溶液的颜色由无色立刻变为黄色;同时
L
溶液中加入Hg
2+
和Ag
+
后
荧光光谱有不同变化
且其他离子的存在并不干扰
L
对Hg
2+
和Ag
+
的选择性识别。研究还发现
L
对Hg
2+
和Ag
+
的荧光识别模式不同:加入Ag
+
后
L
与Ag
+
生成了配合物
发生荧光猝灭;加入Hg
2+
后
L
先与Hg
2+
络合发生荧光猝灭
然后脱去HgS。
A thiourea Schiff base (
L
) containing carbazole was synthesized from carbazole derivative and 4-phenyl-3-amino thiourea as reagents. The structure of compound
L
was characterized by
1
H NMR and MS. The recognition performance and the binding mode of
L
and metal ions were investigated by UV-Vis and fluorescence spectroscopies. The results show that
L
has a quick visual selective recognition response to Hg
2+
and Ag
+
. The addition of metal ions caused the color of
L
changed from colorless to yellow
and it can be identified by the naked eyes. The fluorescence spectrum of
L
has different changes with the adding of Hg
2+
or Ag
+
to the solution. The presence of other ions does not interfere with the selective recognition of
L
for Hg
2+
and Ag
+
. It is also found that the binding model of
L
and Hg
2+
/Ag
+
for fluorescent recognition is different:
L
coordinates with Ag
+
to form complex which causes fluorescence quenching effect;
L
coordinates with Hg
2+
to form complex which causes fluorescence quenching effect
then the complex removes HgS to produce a new compound.
咔唑硫脲席夫碱离子识别
carbazolethioureaSchiff baseions recognition
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