Trapping the δ isomer of the polyoxometalate-based Keggin cluster with a tripodal ligand

Sartzi, H., Miras, H. N. , Vila-Nadal, L. , Long, D. L. and Cronin, L. (2015) Trapping the δ isomer of the polyoxometalate-based Keggin cluster with a tripodal ligand. Angewandte Chemie (International Edition), 54(51), pp. 15488-15492. (doi:10.1002/anie.201505377) (PMID:26511859)

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Abstract

We report the synthesis, structural, and electronic characterization of the theoretically predicted, but experimentally elusive δ-isomer of the Keggin polyanion. A family of δ-Keggin polyoxoanions of the general formula, (TEA)HpNaq [H2M12(XO4)O33(TEA)].rH2O where p, q, r = [2,3,8] for 1 and [4,1,4] for 2 were isolated by the reaction of tungstate(VI) and vanadium(V) with triethanolammonium ions (TEAH), acting as a tripodal ligand grafted to the surface of the cluster leading to the entrapment and stabilization of the elusive polyanhionic δ Keggin archetype. The δ-Keggin species were characterized by single-crystal X-ray diffraction, FT-IR, UV-vis, NMR and ESI-MS spectrometry. Electronic structure and structure-stability correlations were evaluated by means of DFT calculations. The compounds exhibited multi-electron transfer and reversible photochromic properties by undergoing single-crystal-to-single-crystal (SC-SC) transformations accompanied with colour changes under light

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vila-Nadal, Dr Laia and Moiras, Dr Charalampos and Long, Dr De Liang and Cronin, Professor Leroy
Authors: Sartzi, H., Miras, H. N., Vila-Nadal, L., Long, D. L., and Cronin, L.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Angewandte Chemie (International Edition)
Publisher:Wiley - V C H Verlag GmbH & Co. KGaA
ISSN:1433-7851
ISSN (Online):1521-3773
Copyright Holders:Copyright © 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
First Published:First published in Angewandte Chemie (International Edition) 54(51):15488-15492
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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