Approaching the limit of CuII/CuI mixed valency in a CuIBr2–N-methylquinoxalinium hybrid compound

Nicolas Leblanc; Stephen Sproules; Claude Pasquier; Pascale Auban-Senzier; Helene Raffy; Annie K. Powell

doi:10.1039/C5CC04142B

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Approaching the limit of Cu^II/Cu^I mixed valency in a Cu^IBr₂–N-methylquinoxalinium hybrid compound†

Nicolas Leblanc,*^a Stephen Sproules,^b Claude Pasquier,*^c Pascale Auban-Senzier,^c Helene Raffy^c and Annie K. Powell*^ad

Author affiliations

* Corresponding authors

^a Institut für Nanotechnologie, Karlsruher Institut für Technologie, Hermann- von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
E-mail: nicolas.leblanc@partner.kit.edu
Tel: +49 (0)721-608-28922

^b University of Glasgow, School of Chemistry, Joseph Black Building A5-14, University Avenue, Glasgow, Scotland, UK

^c Laboratoire de Physique des Solides, UMR-CNRS 8502, Bat. 510, Université Paris Sud, 91405 Orsay Cedex, France

^d Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstraße 15, Karlsruhe, Germany
E-mail: annie.powell@kit.edu
Fax: +49 (0)721-608-48142
Tel: +49 (0)721-608-42135

Abstract

A novel 1D hybrid salt (MQ)[CuBr₂]_∞ (MQ = N-methylquinoxalinium) is reported. Structural, spectroscopic and magnetic investigations reveal a minimal Cu^II doping of less than 0.1%. However it is not possible to distinguish Cu^I and Cu^II. The unusually close packing of the organic moieties and the dark brown colour of the crystals suggest a defect electronic structure.

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Article information

DOI: https://doi.org/10.1039/C5CC04142B
Article type: Communication
Submitted: 19 May 2015
Accepted: 18 Jun 2015
First published: 18 Jun 2015

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Chem. Commun., 2015,51, 12740-12743

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Approaching the limit of Cu^II/Cu^I mixed valency in a Cu^IBr₂–N-methylquinoxalinium hybrid compound

N. Leblanc, S. Sproules, C. Pasquier, P. Auban-Senzier, H. Raffy and A. K. Powell, Chem. Commun., 2015, 51, 12740 DOI: 10.1039/C5CC04142B

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