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SM ISO690:2012 KAZHEVA, Olga, CHEKHLOV, A., ALEKSANDROV, Grigorii, KRAVCHENKO, A., STARODUB, V., SIVAEV, I., BREGADZE, V., BURAVOV, L., DYACHENKO, Oleg. Structure and conducting properties of new radical cation salts with cobalt bis(dicarbollide) anion. In: Physical Methods in Coordination and Supramolecular Chemistry, 27 septembrie - 1 octombrie 2006, Chişinău. Chisinau, Republic of Moldova: 2006, XVII, p. 135. ISBN 978-9975-62-066-6. |
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Physical Methods in Coordination and Supramolecular Chemistry XVII, 2006 |
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Conferința "The XV-th International Conference Physical Methods in Coordination and Supramolecular Chemistry : The XVII-th Reading in memory of Acad. A.Ablov" Chişinău, Moldova, 27 septembrie - 1 octombrie 2006 | |
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Pag. 135-135 | |
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First molecular conductors with cobalt bis(dicarbollide) anion were synthesized and investigated: (TMTSF)2[3,3’-Co(1,2-C2B9H11)2] (1) (Fig. 1a), (TTF)[3,3’-Co(1,2-C2B9H11)2] (2) and (ET)[3,3’-Co(1,2-C2B9H11)2] (3). Salt (1) is a semiconductor with activation energy Ea ≅ 0.03 eV, conductivity σ293 = 15 Ohm-1cm-1 (Fig. 1b), that is the maximum value of conductivity for metallacarborane radical cation salts [1-4] at room temperature.figureFig. 1. Crystal structure (a) and temperature dependence of resistance (b) for the single crystal of (TMTSF)2[3,3’-Co(1,2-C2B9H11)2].Unlike low-conducting (TTF)[3,3’-Co(1,2-C2B9H11)2], (ET)[3,3’-Co(1,2-C2B9H11)2] salts and similar (TTF)[3,3’-M(1,2-C2B9H11)2] (M = Fe, Ni [1]) salts having neither stacks nor layers and characterized by a cisoid conformation of [3,3’-Co(1,2-C2B9H11)2]- anion, (TMTSF)2[3,3’-Co(1,2C2B9H11)2] (1) salt has conducting stacks and characterized by anion in transoid conformation. |
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