A cationic porphyrin-based self-assembled film for mercury ion detection

被引：43

作者：

Fang, Zhen ^{[1
]}

Liu, Bin ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore

来源：

TETRAHEDRON LETTERS | 2008年 / 49卷 / 14期

关键词：

cationic porphyrin; fluorene; fluorescence quenching; mercury; self-assembly;

D O I：

10.1016/j.tetlet.2008.01.138

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A cationic 5,15-(p-(9,9-bis(6-trimethylammoniumhexyl)fluorenylethynyl)phenyl)porphyrin tetrabromide was synthesized and the self-assembled films were used for Hg2+ detection in aqueous media. The detection response is based on fluorescence quenching of the porphyrin molecule upon coordination with Hg2+. The detection shows high selectivity for Hg2+ over Cu2+, Zn2+, Pb2+, Cd2+, Mn2+, Ni2+, Co2+ and Ca2+. A linear response toward Hg2+ in a concentration range of 1 x 10(-1)-1 x 10(-6) M was observed for the film with a detection limit of 0.1 nM. The cationic porphyrin film shows higher stability and significant improvement in detection sensitivity, as compared to other porphyrin-based sensors. The amphiphilic cationic nature of the porphyrin synthesized also allows for the direct deposition of a porphyrin layer on a bare glass surface through self-assembly. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2311 / 2315

页数：5

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