A highly selective fluorescent and colorimetric chemosensor for Hg 2+ based on a new rhodamine derivative

The design and synthesis of a novel chemosensor 1 based on rhodamine B and 4-chloro-7-nitro-2,1,3-benzoxadiazole (NBD-Cl) and its application in fluorescence and colorimetric detection of Hg 2+ in aqueous solution are reported. The signal change of the chemosensor 1 is based on a specific metal ion...

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Bibliographic Details
Published in:Analytical methods 2016, Vol.8 (9), p.1964-1967
Main Authors: Chen, Jian, Li, Ya, Zhong, Weibang, Wang, Hong, Zhang, Peisheng, Jiang, Jianhui
Format: Article
Language:English
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Summary:The design and synthesis of a novel chemosensor 1 based on rhodamine B and 4-chloro-7-nitro-2,1,3-benzoxadiazole (NBD-Cl) and its application in fluorescence and colorimetric detection of Hg 2+ in aqueous solution are reported. The signal change of the chemosensor 1 is based on a specific metal ion induced ring-opening mechanism of the rhodamine spirolactam. It exhibits a high sensitivity and selectivity for the detection of Hg 2+ over other tested metal ions in CH 3 CN : H 2 O = 1 : 1, and the detection limit can reach 120 nM. In addition, the effects of co-existing metal ions and pH are also investigated. The data obtained clearly indicate that 1 could be used as an excellent chemosensor for Hg 2+ detection in environmental samples.
ISSN:1759-9660
1759-9679
DOI:10.1039/C5AY03281D