Dual Spectroscopic Responses of Pyridinium Hemicyanine Dyes to Anions  

作　　者：Xie, Puhui Guo, Fengqi Zhang, Dasheng Zhang, Lei 

机构地区：[1]College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, China [2]Department of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China

出　　处：《Chinese Journal of Chemistry》2011年第9期1975-1981,共7页中国化学（英文版）

摘　　要：The absorption and fluorescence spectroscopic responses of three pyridinium hemicyanine dyes to anions F , Cl , Br , I-, H2P02, HS04 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 iden- tical concentrations. At higher concentrations of OAc （more than 1 equiv.）, the interaction was opposite for each compound. 1H 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 chemo- sensors toward F- and OAc- according to the subtle difference in the affinity of F and OAc .The absorption and fluorescence spectroscopic responses of three pyridinium hemicyanine dyes to anions F , Cl , Br , I-, H2P02, HS04 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 iden- tical concentrations. At higher concentrations of OAc （more than 1 equiv.）, the interaction was opposite for each compound. 1H 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 chemo- sensors toward F- and OAc- according to the subtle difference in the affinity of F and OAc .

关 键 词：HEMICYANINE absorption spectra fluorescence spectra CHEMOSENSORS ANIONS 

分 类 号：TQ614.4[化学工程—精细化工] TN215[电子电信—物理电子学]