排序方式: 共有1条查询结果,搜索用时 15 毫秒
1
1.
S. CurreliP. Deplano M.L. Mercuri L. PiliaA. Serpe F. BigoliM.A. Pellinghelli E. CoronadoC.J. Gómez-Garc?a E. Canadell 《Journal of solid state chemistry》2002,168(2):653-660
The synthesis, X-ray structure, magnetic and transport properties of the compound Ni(dmf)6[Ni(dsit)2]2 (dmf=dimethylformamide, dsit=1,3-dithiole-2-thione-4,5-diselenolate) are described. This compound crystallizes in the monoclinic space group P21/c, with a=18.709(6), b=22.975(5), c=20.418(5) Å, β=99.31(2)° and Z=6; its structure consists of [Ni(dsit)2]22− dimers and isolated [Ni(dmf)6]2+ cations both centrosymmetric and non-centrosymmetric. The dimers are packed forming chains along the [101] direction with short Se·Se interdimer contacts. Additional interchains S·S contacts render this structure a three-dimensional character, never observed so far in other [Ni(dsit)2]− salts. This compound exhibits semiconducting behavior with a room temperature conductivity (1 S cm−1) much higher than those reported for other salts of the [Ni(dsit)2]− anion. Tight-binding band structure calculations were used to analyze the origin of the semiconducting properties of this salt. The magnetic susceptibility shows Curie behavior with C=1.25 emu K mol−1, typical of isolated Ni(II) ions as expected for the octahedrally coordinated [Ni(dmf)6]2+ cations. 相似文献
1