A Squaraine-Based Colorimetric and "Turn on" Fluorescent Sensor for Selective Detection of Hg2+ in an Aqueous Medium

被引：200

作者：

Chen, Cheng

Wang, Ruyong

Guo, Liangqia

Fu, Nanyan

Dong, Haijun

Yuan, Yaofeng ^{[1
]}

机构：

[1] Fuzhou Univ, Minist Educ, Key Lab Anal & Detect Technol Food Safety, Fuzhou 350108, Fujian Province, Peoples R China

来源：

ORGANIC LETTERS | 2011年 / 13卷 / 05期

基金：

中国国家自然科学基金;

关键词：

LANGMUIR-BLODGETT-FILMS; AGGREGATION; DYES; ION; PHOTOPHYSICS; FOLDAMER; REPORTER; BEHAVIOR; MERCURY;

D O I：

10.1021/ol200024g

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A novel squaraine-based chemosensor SQ-1 has been synthesized, and its sensing behavior toward various metal ions was investigated by UV- vis and fluorescence spectroscopies. In AcOH-H2O (40:60, v/v) solution, Hg2+ ions coordinate with SQ-1 causing a deaggregation which induces a visual color and absorption spectral changes as well as strong fluorescence. In contrast, the addition of other metals (e.g., Pb2+, Cd2+, Cu2+, Zn2+, Al3+, Ni2+, Co2+, Fe3+, Ca2+, K+, Mg2+, Na+, and Ag+) does not induce these changes at all. Thus SQ-1 is a specific Hg2+ sensing agent due to the inducing deaggregation of the dye molecule by Hg2+.

引用

页码：1162 / 1165

页数：4

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