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- Title
Reaction-Based Colorimetric and Ratiometric Fluorescence Sensor for Detection of Cyanide in Aqueous Media.
- Authors
Lin, Yan-Duo; Pen, Yung-Shu; Su, Weiting; Liau, Kang-Ling; Wen, Yun-Sheng; Tu, Chin-Hsin; Sun, Chia-Hsing; Chow, Tahsin J.
- Abstract
A stilbene-based compound ( 1) has been prepared and was highly selective for the detection of cyanide anion in aqueous media even in the presence of other anions, such as F−, Cl−, Br−, I−, ClO4−, H2PO4−, HSO4−, NO3−, and CH3CO2−. A noticeable change in the color of the solution, along with a prominent fluorescence enhancement, was observed upon the addition of cyanide. The color change was observed upon the nucleophilic addition of the cyanide anion to the electron-deficient cyanoacrylate group of 1. The spectral changes induced by the reaction were analyzed by comparison with two model compounds, such as compound 2 with dimethyl substituents and compound 3 without a cyanoacrylate group. An intramolecular charge-transfer (ICT) mechanism played a key role in the sensing properties, and the mechanism was supported by DFT/TDDFT calculations.
- Publication
Chemistry - An Asian Journal, 2012, Vol 7, Issue 12, p2864
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.201200578