Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10619054 | Synthetic Metals | 2005 | 12 Pages |
Abstract
Four new radical cation salts based on the amide functionalized EDT-TTF organic donors EDT-TTF-CONH2 (D1) and EDT-TTF-(CONH2)2 (D2), αâ²-(D1)4[FeNO(CN)5] (1), αâ²-(D1)4[Co(CN)6] (2), β-(D1)6[Fe(CN)6] (3) and (D2)4[FeNO(CN)5]NB (4), have been synthesized and characterized by X-ray single crystal diffraction experiments, band structure calculations and electrical resistivity measurements. Functionalized organic donors are remarkable for the ability to form cationâ¯cation and cationâ¯anion type hydrogen bonds which can effectively direct the crystal architecture of molecular conductors. The structural analysis reveals a well-developed hydrogen bond network in the crystals investigated. (D1)2-dimers or (D2)n-extended zigzag chains of donors connected through functional groups are found to be stable structural motifs in 1-4. Remarkably, salts 1 and 2 are isostructural despite the presence of anions of different charge (â2 and â3, respectively) and the inherent difference in the degree of charge transfer has a clear effect on the transport properties: ÏRT(2)/ÏRT(1) = 300. Salt 3 differs from 1 and 2 both in the stoichiometry and packing of the conducting organic layer. Crystals of 4 exhibit a superstructure with the incommensurate vector q = ±(0.5, 0.3, 0.2).
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Physical Sciences and Engineering
Materials Science
Biomaterials
Authors
L.V. Zorina, S.S. Khasanov, S.V. Simonov, R.P. Shibaeva, L.A. Kushch, L.I. Buravov, E.B. Yagubskii, S. Baudron, C. Mézière, P. Batail, E. Canadell, P. Auban-Senzier,