Azo dyes based on 8-hydroxyquinoline benzoates:: Synthesis and application as colorimetric Hg2+-selective chemosensors

被引：59

作者：

Cheng, Yunfei

Zhang, Meng

Yang, Hong

Li, Fuyou ^{[1
]}

Yi, Tao

Huang, Chunhui

机构：

[1] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China

[2] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China

来源：

DYES AND PIGMENTS | 2008年 / 76卷 / 03期

关键词：

azo dyes; 8-hydroxyquinoline benzoates; colorimetric Hg2+-selective chemosensor;

D O I：

10.1016/j.dyepig.2007.01.022

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of 8-hydroxyquinoline benzoates with diverse azo substituents were synthesized by diazo-reaction of 2-methyl-8-hydroxyquinoline with some arylamines, followed by esterification with benzoyl chloride. All the products allowed selective sensing with Hg2+, Which was affirmed by UV-vis absorption spectra. Different spectral changes were observed for these compounds with electron-donating substituent (bathochromic shift) or electron-withdrawing substituent (hypsochromic shift). Particularly, obvious color change was observed for 5-(4-dimethylaminophenylazo)-2-methylquinolin-8-yl benzoate in the presence of Hg2+, which made it possible for distinguishing Hg2+ from other metal ions by naked eye. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：775 / 783

页数：9

共 72 条

[1]

[Anonymous], 1987, BINDING CONSTANTS

[2] A squaraine-based chemosensor for Hg2+ and Pb2+ [J].