Issue 31, 2007
From the journal:

Journal of Materials Chemistry

Multi-layered molecular charge-transfer salts containing alkali metal ions

Lee Martin,a   Peter Day,*a   William Clegg,b   Ross W. Harrington,b   Peter N. Horton,c   Ann Bingham,c   Michael B. Hursthouse,c   Paul McMilland  and  Steven Firthd  

* Corresponding authors

a Davy-Faraday Research Laboratory, The Royal Institution of Great Britain, 21 Albemarle Street, London, UK
E-mail: pday@ri.ac.uk
Fax: +44 (0)20 7670 2958
Tel: +44 (0)20 7409 2992

b School of Natural Sciences (Chemistry), Newcastle University, Newcastle upon Tyne, UK
E-mail: w.clegg@ncl.ac.uk
Fax: +44 (0)191 222 6929
Tel: +44 (0)191 222 6649

c Department of Chemistry, University of Southampton, Highfield, Southampton, UK
E-mail: pnh@soton.ac.uk
Fax: +44 (0)23 8059 6723
Tel: +44 (0)23 8059 6722

d Department of Chemistry, Materials Chemistry Centre, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, UK
E-mail: s.firth@ucl.ac,uk
Fax: +44 (0)20 7679 7463
Tel: +44 (0)20 7679 4709

Abstract

The synthesis, crystal structure and physical properties of two new BEDT-TTF charge-transfer salts containing the tris(oxalato)ferrate(III) anion are described. The most commonly found tris(oxalato)metallate(III) salts of BEDT-TTF contain alternating layers of BEDT-TTF cations and tris(oxalato)metallate anions, but the two salts reported here are multi-layered structures. Compound I is of the type ABCDABCDA as observed previously in the proton-conducting compound β″-(BEDT-TTF)4[Fe(C2O4)3]2·18-crown-6·9HxO and the alpha–beta family of salts α,β″-(BEDT-TTF)4[(NH4)Ga/Fe(C2O4)3]·G (G = PhN(CH3)COH, PhCH2CN and PhCOCH3). In α‴-(BEDT-TTF)9[Fe(C2O4)3]8Na18(H2O)24 (I) the A layers consist of only BEDT-TTF, B/D layers consist of tris(oxalato)ferrate(III) and sodium, and the C layers consist of sodium and water. In α-(BEDT-TTF)10(18-crown-6)6K6[Fe(C2O4)3]4(H2O)24 (II) the packing is of a type not seen before, ABCBABCBA. The A layers in II consist of only BEDT-TTF, B layers consist of tris(oxalato)ferrate(III), potassium, water and 18-crown-6, and C layers consist of 18-crown-6, potassium and water. Both salts are semiconductors between room temperature and 140 K.

Graphical abstract: Multi-layered molecular charge-transfer salts containing alkali metal ions

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Article information

DOI
https://doi.org/10.1039/B702442H
Article type
Paper
Submitted
15 Feb 2007
Accepted
22 May 2007
First published
29 May 2007

J. Mater. Chem., 2007,17, 3324-3329

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Multi-layered molecular charge-transfer salts containing alkali metal ions

L. Martin, P. Day, W. Clegg, R. W. Harrington, P. N. Horton, A. Bingham, M. B. Hursthouse, P. McMillan and S. Firth, J. Mater. Chem., 2007, 17, 3324 DOI: 10.1039/B702442H

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