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Selective signaling of fluoride anion based on imidazole moieties
Author(s) -
Zheng Yuhui,
Wang Qianming,
Tan Chaoliang
Publication year - 2011
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.1351
Subject(s) - europium , imidazole , chemistry , benzimidazole , fluoride , ligand (biochemistry) , ring (chemistry) , hydrogen bond , ion , inorganic chemistry , photochemistry , medicinal chemistry , stereochemistry , molecule , organic chemistry , receptor , biochemistry
The imidazole ring unit in both 2‐(2′‐hydroxyphenyl)‐benzimidazole (ligand a) and a europium(III) complex exhibited specific luminescent responses in the presence of fluoride anions. UV‐visible and 1 H‐nuclear magnetic resonance spectra showed that the NH bond of the imidazole ring can form a hydrogen bond with added fluoride anions. The detection limits are 5 × 10 −6 m for organic ligand and 1.0 × 10 −6 m for the europium complex respectively. The response times are less than 3 s. The europium complex exhibits a linear response in a concentration range lower than 1.0 × 10 −6 m ( Y = −666.86 X + 730.1). Copyright © 2011 John Wiley & Sons, Ltd.