A new "on-off-on" fluorescent sensor for cascade recognition of Hg2+ and S2- ion in aqueous medium

被引：11
作者：
Wang, Liyan [1 ]
Tian, Ying [1 ]
He, Xianyou [1 ]
Zhao, Bing [1 ]
Ma, Wenhui [1 ]
Yang, Jia [1 ]
Song, Bo [1 ]
机构：
[1] Qiqihar Univ, Coll Chem & Chem Engn, 42 Wenhua Rd, Jianhua Dist 161006, Qiqihar, Peoples R China
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2018年 / 358卷
基金：
中国国家自然科学基金;
关键词：
Amide group; Cascade recognition; Mercury ion; Sulfide ion; HYDROGEN-SULFIDE; COLORIMETRIC DETECTION; SEQUENTIAL RECOGNITION; PROBE; HG(II); CHEMOSENSOR; CU2+; MERCURY(II); CHEMODOSIMETER; SELECTIVITY;
D O I：
10.1016/j.jphotochem.2018.03.037
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel Hg2+ ion fluorescent sensor 1 has been synthesized based on amide group, sensor 1 showed a highly sensitive and selective response towards Hg2+ over other metal ions by reversibly forming a [1-Hg2+] complex in 100% aqueous solution. The fluorescence detection limits was 0.41 nM. The Job's plots, the MS analysis and H-1 NMR titration experiments implied that there was only the formation of a 1/Hg2+ complex with 1:1 stoichiometry. Moreover, S2- ion can remove Hg2+ from the complex and restore the spectral signal of 1. This research may enrich the field of multi-functional chemosensors in natural products. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：300 / 306
页数：7
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