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A Selective and Sensitive “Turn‐on” Fluorescent Chemosensor for Recognition of Hg 2+ Ions in Water
Author(s) -
Dai Huiling,
Yan Yuanyuan,
Guo Yong,
Fan Lingling,
Che Zhiping,
Xu Hui
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201201604
Subject(s) - fluorescence , chemistry , turn (biochemistry) , photochemistry , metal ions in aqueous solution , selectivity , aldehyde , ion , water soluble , combinatorial chemistry , organic chemistry , catalysis , optics , biochemistry , physics
Based upon highly selective and irreversible Hg 2+ ‐promoted deprotection of the dithioacetal reaction, a new water‐soluble “turn‐on” fluorescent chemosensor ( 1 ) was prepared and exhibited high selectivity and sensitivity towards the Hg 2+ ion over other heavy and transition‐metal ions in pure water by transforming a weakly fluorescent precursor (colorless) to a highly fluorescent aldehyde (yellow–green; see figure) with a 155‐fold increase in fluorescent intensity.