Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 96, Issue -, Pages 77-81Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2012.05.018
Keywords
Ion sensing; Cyanide; Optical sensor; Hemicyanine dye; Absorption changes
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Funding
- Basic Science Research Program through the National Research Foundation (NRF) Grant
- Korea government (MEST) [2011-0001084]
- Fundamental R&D Program for Core Technology of Materials
- Ministry of Knowledge Economy, Republic of Korea
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Simple hemicyanine dyes were synthesized by a classical condensation reaction. The structures of these dyes were characterized by H-1 NMR spectroscopy, elemental analysis, and FAB-Mass spectrometry. The sensing behavior of the hemicyanines towards a selection of anions was investigated by UV-vis absorption spectroscopy. These structurally simple dyes displayed a rapid response and high selectivity for cyanide ion over other common anions in the DMSO/H2O solution. Different sensing mechanism of the dyes to cyanide ion were confirmed by H-1 NMR studies, together with theoretical calculations based on DFT and PPP-MO methods. These dyes show no colorimetric response for other anions investigated. (C) 2012 Elsevier B.V. All rights reserved.
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