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Indexed by:期刊论文

Date of Publication:2011-12-01

Journal:DYES AND PIGMENTS

Included Journals:Scopus、SCIE、EI

Volume:91

Issue:3

Page Number:294-297

ISSN No.:0143-7208

Key Words:Highly sensitive; pH chemosensor; Large wavelength shift; Colorimetric sensor; Visible color change; Naked eye

Abstract:A visible colorimetric pH sensitive chemosensor (Dye A) based on a benzophenone azo dye was designed and synthesized. This chemosensor had a large wavelength shift (>170 nm) and showed excellent sensitivity in the range of pH from 7.9 to 9.3. In addition, the possible mechanism of the chemosensor with remarkable change of visible color was established by the (1)H-NMR- and (13)C-NMR-titration experiments. This pH chemosensor has a fast response time and is fully reversible, which is important for pH chemosensors in practical applications. In this study, Dye A was successfully applied to determine the pH of simulated small intestine fluid. (C) 2011 Elsevier Ltd. All rights reserved.