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Unexpected complexation behaviour of a sol-gel immobilised dye: the development of an optical copper(II) sensor

Sommerdijk, Nico A. J. M., Poppe, Andrea, Gibson, Ceri A., Wright, John D. (1998) Unexpected complexation behaviour of a sol-gel immobilised dye: the development of an optical copper(II) sensor. Journal of Materials Chemistry, 8 (3). pp. 565-567. ISSN 0959-9428. (doi:10.1039/a708882e) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:17160)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
http://dx.doi.org/10.1039/a708882e

Abstract

The metal-complexing dye Eriochrome Cyanine R (ECR) has been entrapped in sol-gel composites of good optical quality. The immobilisation of ECR had a dramatic effect on the complexation of metal ions. The strong colour change of aqueous ECR solutions, associated with the complexation of aluminium(III) ions, was not observed with ECR-containing composites. Instead a selectivity for copper(II) ions was found and a sensing system for these ions was developed. Thickness and pore structure were optimised to enhance sensitivity, lowering the detection limit for copper(II) ions to 0.1 ppm. The altered complexation behaviour is discussed in terms of effects of entrapment on entropy and enthalpy changes of complexation.

Item Type: Article
DOI/Identification number: 10.1039/a708882e
Additional information: Proceedings paper
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Tara Puri
Date Deposited: 01 Jul 2009 22:20 UTC
Last Modified: 16 Nov 2021 09:55 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/17160 (The current URI for this page, for reference purposes)

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