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Colorimetric anion sensor based on receptor having indole- and thiourea-binding sites

Murali, MG and Vishnumurthy, KA and Seethamraju, Sindhu and Ramamurthy, Praveen C (2014) Colorimetric anion sensor based on receptor having indole- and thiourea-binding sites. In: RSC ADVANCES, 4 (39). pp. 20592-20598.

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Official URL: http://dx.doi.org/10.1039/c4ra01555j

Abstract

A new colorimetric sensor L containing nitro-substituted indole and bisthiocarbonohydrazone units for selective fluoride and acetate ions is designed and synthesized. The receptor L shows well-defined color change in the visible region of the spectrum with an absorption band at similar to 515 nm and 506 nm, respectively, for the F- and CH3COO- ions in an acetonitrile solution. Job's plots indicated the formation of 1 : 1 (L with CH3COO-) and 1 : 2 (L with F-) complexes. The interaction of L with the F- ion undergoes a deprotonation process and release of HX2](-), whereas with the CH3COO- ion, it forms a stable LH2(...)X](-) complex. The relative affinities of the anions with L are rationalized using computational studies.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
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Depositing User: Id for Latest eprints
Date Deposited: 24 Jun 2014 07:14
Last Modified: 24 Jun 2014 07:14
URI: http://eprints.iisc.ac.in/id/eprint/49340

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