Issue 32, 2013

Dicyanovinyl terthiophene as a reaction based colorimetric and ratiometric fluorescence probe for cyanide anions

Abstract

3′-Dicyanovinyl terthiophene 3 was synthesized and the changes in absorption and emission properties of 3 in the presence of various anions were evaluated. Compound 3 acts as a selective colorimetric as well as a ratiometric fluorescence probe for cyanide anions in aqueous THF solution even in the presence of other anions such as AcO, F, Cl, Br, NO2, N3, HS and ClO4. Obstruction in an intramolecular charge transfer (ICT) by the nucleophilic addition of a cyanide anion to the dicyanovinyl group induces remarkable changes in the absorption and emission spectra of 3. The signal transduction mechanism was investigated by absorption and emission spectroscopy, 1H NMR titration and DFT calculations.

Graphical abstract: Dicyanovinyl terthiophene as a reaction based colorimetric and ratiometric fluorescence probe for cyanide anions

Supplementary files

Article information

Article type
Paper
Submitted
22 Mar 2013
Accepted
09 May 2013
First published
10 May 2013

RSC Adv., 2013,3, 13457-13462

Dicyanovinyl terthiophene as a reaction based colorimetric and ratiometric fluorescence probe for cyanide anions

P. B. Pati and S. S. Zade, RSC Adv., 2013, 3, 13457 DOI: 10.1039/C3RA41413B

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