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Issue 19, 2016

Enhanced Zn2+ ion-sensing behavior of a benzothiazole derivative on encapsulation by β-cyclodextrin

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Abstract

We report, in this paper, a benzothiazole derivative which shows selective binding of zinc ions among a pool of metal ions and the enhanced selectivity of the same metal ion by the derivative in its β-cyclodextrin bound form. The Zn2+ ion binding is studied using UV-visible absorption and fluorescence spectroscopy. The stoichiometry and binding mode of the benzothiazole derivative-β-cyclodextrin complex are determined using 1D and 2D NMR spectroscopic analysis. The cyclodextrin molecule slides over the benzothiazole derivative and resides above the aminomethyl group linking the benzothiazole and dihydroxyphenyl moieties. The site of binding of the Zn2+ ion with the compound remains the same both in the compound's free and cyclodextrin-complexed forms. Molecular modeling studies were also carried out in order to obtain more details about the cyclodextrin-compound and Zn2+-compound interactions, and their results are in close agreement with obtained experimental data.

Graphical abstract: Enhanced Zn2+ ion-sensing behavior of a benzothiazole derivative on encapsulation by β-cyclodextrin

Supplementary files

Article information


Submitted
14 Jan 2016
Accepted
27 Jan 2016
First published
08 Feb 2016

This article is Open Access

RSC Adv., 2016,6, 15670-15677
Article type
Paper

Enhanced Zn2+ ion-sensing behavior of a benzothiazole derivative on encapsulation by β-cyclodextrin

R. Q. Paulpandi, S. Ramasamy, M. S. Paulraj, F. G. Díaz Baños, G. Villora, J. P. Cerón-Carrasco, H. Pérez-Sánchez and I. V. Muthu Vijayan Enoch, RSC Adv., 2016, 6, 15670 DOI: 10.1039/C6RA01202G

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