期刊
DYES AND PIGMENTS
卷 95, 期 1, 页码 89-95出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2012.03.015
关键词
Boron-dipyrromethene; Pyridine-4-one; Pyridine-4-thione; Desulfurization; Fluorescence sensor; Chemodosimeter
资金
- BRNS
- Indian Institute of Technology, Bombay
A new chemodosimeter for detection of Hg(II) ions based on boron-dipyrromethene (BODIPY) is developed. The 3-(pyridine-4-thione)BODIPY was synthesized in high yield by treating 3-(pyridine-4-one)BODIPY with Lawesson's reagent. The 3-(pyridine-4-thione) BODIPY was confirmed by HR-MS mass, H-1, H-1-H-1 COSY, F-19 and B-11 NMR techniques. In H-1 NMR, the protons which are adjacent to sulfur in 3-(pyridine-4-thione)BODIPY showed similar to 1 ppm downfield shift compared to equivalent protons in 3-(pyridine-4-one)BODIPY. The absorption and electrochemical properties experienced slight changes in 3-(pyridine-4-thione)BODIPY compared to 3-(pyridine-4-one)BODIPY. The compound 3-(pyridine-4-thione)BODIPY is very weakly fluorescent compared to 3-(pyridine-4-one)BODIPY. Furthermore, 3(pyridine-4-thione)BODIPY can be used as an exclusive chemodosimeter for Hg2+ ion as it shows significant enhancement in the fluorescence intensity and a dramatic visible color change from pink to fluorescent green in the presence of Hg(II) ions. (C) 2012 Elsevier Ltd. All rights reserved.
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