Pyrene-appended imidazolium probes as 3,5-dinitrosalicylic acid sensors in 10% aqueous media

Ashwani Kumar, Anup Pandith, Hong Seok Kim

研究成果: 雜誌貢獻文章同行評審

23 引文 斯高帕斯(Scopus)

摘要

Abstract Pyrene-appended imidazolium salts (1 and 2) were synthesized for sensing of salicylic acids and they selectively and sensitively detected 3,5-dinitrosalicylic acid (3,5-DNSA) in pH 7.4 PBS-EtOH (1:9) solution. The interaction of 3,5-DNSA with 1 and 2 was examined by UV-visible, fluorescence, and 1H NMR spectroscopy and was supported by DFT calculations. The binding of 3,5-DNSA to probe 2 leads to complete quenching of its green excimer emission because of loss of π-π interactions between the pyrene rings and energy transfer from electron-rich pyrene to electron-deficient 3,5-DNSA. Binding of 3,5-DNSA to probe 1 causes its blue (monomer) fluorescence to "switch off". The limit of detection of 3,5-DNSA in water was 1 μM using probe 2 coated onto a paper strip.
原文英語
文章編號4848
頁(從 - 到)351-358
頁數8
期刊Dyes and Pigments
122
DOIs
出版狀態已發佈 - 7月 27 2015
對外發佈

ASJC Scopus subject areas

  • 一般化學工程
  • 製程化學與技術

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