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Electrochemical studies of the conformational and sodium cation complexation properties of calix[4]arenediquinones

Chen, Zheng, Gale, Philip A., Heath, Jennifer A. and Beer, Paul D. (1994) Electrochemical studies of the conformational and sodium cation complexation properties of calix[4]arenediquinones Journal of the Chemical Society Faraday Transactions, 90, (19), pp. 2931-2938. (doi:10.1039/ft9949002931).

Record type: Article

Abstract

Voltammetric studies of three calix[4]arenediquinones, dimethylethercalix[4]arenediquinone (L1), diestercalix[4]arenediquinone (L2) and diamidecalix[4]arenediquinone (L3), have revealed large contributions from conformational changes of these molecules to their respective electrochemical behaviour. The reduction potential of each respective quinone moiety depends on the properties of the aromatic groups, particularly their mobility. It is proposed that the rotation of the quinone groups through the calix[4]arenediquinone cavity, while fast in the neutral state at room temperature, is slowed upon reduction. Distinguishing between simple ion pairing and true ion complexation is electrochemically demonstrated for L2 and L3 and sodium cations. The association constant for L3 and sodium cations has been electrochemically determined and is 2.0 × 105 which is in good agreement with the value obtained from UV–VIS measurements.

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Published date: 1994
Organisations: Organic Chemistry: Synthesis, Catalysis and Flow

Identifiers

Local EPrints ID: 337246
URI: http://eprints.soton.ac.uk/id/eprint/337246
ISSN: 0956-5000
PURE UUID: 977d2cbf-5e09-414b-8db9-305800401032
ORCID for Philip A. Gale: ORCID iD orcid.org/0000-0001-9751-4910

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Date deposited: 20 Apr 2012 15:44
Last modified: 18 Jul 2017 06:04

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Contributors

Author: Zheng Chen
Author: Philip A. Gale ORCID iD
Author: Jennifer A. Heath
Author: Paul D. Beer

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