Hybrid Molecular Materials Based upon Organic π-Electron Donors and Inorganic Metal Complexes. Conducting Salts of Bis(ethylenediseleno)tetrathiafulvalene (BEST) with the Octahedral Anions Hexacyanoferrate(III) and Nitroprusside
✍ Scribed by Miguel Clemente-León; Eugenio Coronado; José R. Galán-Mascarós; Carlos Giménez-Saiz; Carlos J. Goémez-Garcı́a; Jean M. Fabre; G.A. Mousdis; G.C. Papavassiliou
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 413 KB
- Volume
- 168
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
The synthesis, structure and physical characterization of three new radical salts formed by the organic donor bis(ethylenediseleno)tetrathiafulvalene (BEDS-TTF or BEST) and the paramagnetic hexacyanoferrate(III) anion [Fe(CN) 6 ] 3À or the photochromic nitroprusside anion [Fe(CN) 5 NO] 2À are reported: 2) and (BEST) 2 [Fe(CN) 5 NO] (3). Salts 1 and 3 show a layered structure with alternating organic (b-type packing) and inorganic slabs. Salt 2 shows an original interpenetrated structure probably due to the unprecedented presence of (BEST) 2+ dications. The three salts are semiconductors although salt 1 exhibits a high room temperature conductivity and a semiconducting-semiconducting transition at ca. 150 K which has been attributed to a dimerization in the organic sublattice.