p-dimethylaminobenzaldehyde thiosemicarbazone:: A simple novel selective and sensitive fluorescent sensor for mercury(II)

被引：94
作者：
Yu, Y
Lin, LR
Yang, KB
Zhong, X
Huang, RB [1 ]
Zheng, LS
机构：
[1] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China
[2] Longyan Coll, Longyan 364000, Peoples R China
[3] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
来源：
TALANTA | 2006年 / 69卷 / 01期
关键词：
sensor; Mercury(II); fluorescence; thiosemicarbazone;
D O I：
10.1016/j.talanta.2005.09.015
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A novel and simple fluorophore, p-dimethylan-tinobenzaidehyde thiosemicarbazone (DMABTS), was prepared in order to find available fluorescent chemosensor for mercuric ion in aquesous solution. DMABTS emitted fluorescence at 448 nm in aqueous solution and its fluorescence intensity was completely quenched upon interaction with Hg" ions, which should be attributed to the 1: 1 complex formation between DMABTS and Hg 2+. The binding constant of the complex was determined as 7.48 x 10(6) Mol l(-1). The linear range of quantitative detection of 0 to 5.77 x 10(-6) Mol l(-1) and the detection limit of 7.7 x 10(-7) Mol l(-1) for Hg2+ in the 6.3 x 10(-6) Mol l(-1) DMABTS aqueous solution were obtained from a calibration curve. The coexistence of several transition metal ions and anions did interfere the fluorometric titration of Hg" ion by less than 4% in the emission change. (c) 2005 Elsevier B.V All rights reserved.
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页码：103 / 106
页数：4
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