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Naphthoimidazolium based ratiometric fluorescent probes for F− and CN−, and anion-activated CO2 sensing

Title
Naphthoimidazolium based ratiometric fluorescent probes for F− and CN−, and anion-activated CO2 sensing
Authors
Kwon N.Baek G.Swamy K.M.K.Lee M.Xu Q.Kim Y.Kim S.-J.Yoon J.
Ewha Authors
김성진김영미윤주영K.M.K Swamy
SCOPUS Author ID
김성진scopus; 김영미scopus; 윤주영scopus
Issue Date
2019
Journal Title
Dyes and Pigments
ISSN
0143-7208JCR Link
Citation
Dyes and Pigments vol. 171
Keywords
carbon dioxide sensorCyanide selective fluorescent probeFluoride selective fluorescent probeImidazolium receptor for anionsRatiomertic fluorescent sensor
Publisher
Elsevier Ltd
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The results of the current study show that fluoride and cyanide recognition by two naphthoimidazolium derivatives can be applied to CO2 sensing. Among various anions, only fluoride and cyanide promote changes in absorption and fluorescence wavelegnth maxima of the naphthoimidazolium derivative in CH3CN. The changes are attributed to (C–H)+—anion- ionic hydrogen bonding interactions between the conjugated imidazolium salts and these anions. Especially important is the observations that the fluorescence emission maxima of the naphthoimidazolium derivative at 465 nm undergo hysochromic shifts to 375 nm upon addition of fluoride and cyanide exclusively. The naphthoimidazolium derivatives undergo highly selective changes in their fluoerecence maximum from 465 nm to 375 nm upon addition of CN− even when 2% water is present in the CH3CN solution. Moreover, exposure of the solution of CN− activated naphthoimidazolium derivative to CO2 promotes a red shift of emission maximum back to 465 nm. The results demonstrate that the naphthoimidazolium derivatives can be utilized for anion activated ratiometric sensing of CO2. © 2019
DOI
10.1016/j.dyepig.2019.107679
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자연과학대학 > 화학·나노과학전공 > Journal papers
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