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Selective and sensitive fluorescent turn‐off chemosensors for Fe 3+
Author(s) -
Fu Li,
Mei Jie,
Zhang JiTao,
Liu Yi,
Jiang FengLei
Publication year - 2012
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2406
Subject(s) - anthracene , fluorescence , chemistry , selectivity , histidine , photochemistry , metal ions in aqueous solution , aqueous solution , combinatorial chemistry , quenching (fluorescence) , metal , organic chemistry , physics , quantum mechanics , enzyme , catalysis
Two novel chemosensors (2a and 2b) were synthesized by facile condensation of the binding unit ( l ‐histidine) and the fluorophores (anthracene and dansyl groups). Both of them displayed high selectivity and sensitivity towards Fe 3+ over other metal ions in aqueous solution. The sensing mechanism was based on the paramagnetic property of Fe 3+ that would lead to fluorescence quenching of the fluorophores when Fe 3+ was bound to the recognition units. The results showed that l ‐histidine was a good coordination motif for Fe 3+ and both the anthracene and dansyl groups can sensitively report the sensing information. Copyright © 2012 John Wiley & Sons, Ltd.