Two new radical cation salts, (BETS)6Bi3Cl12·PhCl 1 and (BETS)2Bi2Cl8 2, where BETS is bis(ethylenedithio)tetraselenafulvalene, have been obtained and their structures and conducting properties studied. Salt 1 has a layered structure, consisting of radical cation layers of the α type, and segregated anion sheets containing discrete [Bi3Cl12]3â trinuclear anions and PhCl solvent molecules. It is metallic down to 180 K. The crystal structure of salt 2 consists of stacks of BETS radical cations, with polymeric [(Bi2Cl8)n]2nâ anion chains arranged in a chessboard fashion. The compound 2 exhibits semiconducting properties.
两种新的自由基阳离子盐(BE
TS)6Bi3Cl12·PhCl 1和(BE
TS)2Bi2Cl8 2(其中BE
TS是双(乙撑二
硫)四
硒富瓦烯)已经获得,其结构和导电性能也已研究。盐1具有层状结构,由α型自由基阳离子层和分离的阴离子片层组成,其中包含离散的[Bi3Cl12]3-三核阴离子和PhCl溶剂分子。在180 K以下为
金属态。盐2的晶体结构由BE
TS自由基阳离子堆叠组成,聚合物[(Bi2Cl8)n]2n-阴离子链以棋盘状排列。化合物2表现出半导体特性。