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Dual Spectroscopic Responses of Pyridinium Hemicyanine Dyes to Anions
Author(s) -
Xie Puhui,
Guo Fengqi,
Zhang Dasheng,
Zhang Lei
Publication year - 2011
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201180343
Subject(s) - chemistry , pyridinium , chromogenic , fluorescence , absorption (acoustics) , hydrogen bond , proton nmr , medicinal chemistry , pyridinium compounds , photochemistry , stereochemistry , organic chemistry , molecule , chromatography , physics , quantum mechanics , acoustics
The absorption and fluorescence spectroscopic responses of three pyridinium hemicyanine dyes to anions F − , Cl − , Br − , I − , H 2 PO 4 − , HSO 4 − and OAc − were investigated. At lower concentrations of OAc − (less than 1 equiv.), both the absorption and the fluorescence intensities of 1 – 3 were more effectively changed than F − at identical concentrations. At higher concentrations of OAc − (more than 1 equiv.), the interaction was opposite for each compound. 1 H NMR results indicated the interaction between 1 , 2 or 3 and F − proceeded through hydrogen bonding. The results showed that these dyes are promising to develop dual fluorescence and chromogenic chemosensors toward F − and OAc − according to the subtle difference in the affinity of F − and OAc − .