Molecular conductors with 8,8′-diiodo cobalt bis(dicarbollide) anion
作者:Olga N. Kazheva、Grigorii G. Alexandrov、Andrey V. Kravchenko、Vladimir A. Starodub、Irina A. Lobanova、Igor B. Sivaev、Vladimir I. Bregadze、Lev V. Titov、Lev I. Buravov、Oleg A. Dyachenko
DOI:10.1016/j.jorganchem.2009.03.035
日期:2009.7
New molecularconductors on the base of 8,8′-diiodo cobalt bis(dicarbollide) anion (TTF)[8,8′-I2-3,3′-Co(1,2-C2B9H10)2] (1), (BMDT-TTF)4[8,8′-I2-3,3′-Co(1,2-C2B9H10)2] (2) and (BEDT-TTF)2[8,8′-I2-3,3′-Co(1,2-C2B9H10)2] (3) were synthesized and their crystal structures and electrical conductivities were determined. All the radicalcation salts prepared were found to be semiconductors. Some regularities
基于8,8'-二碘代钴双(双糖脂)阴离子(TTF)[8,8'-I 2 -3,3'-Co(1,2-C 2 B 9 H 10)2的新分子导体](1),(BMDT-TTF)4 [8,8'-I 2 -3,3'-Co(1,2-C 2 B 9 H 10)2 ](2)和(BEDT-TTF)2 [8,8'-I 2 -3,3'-Co(1,2-C 2 B 9 H 10)2 ](3合成)并确定其晶体结构和电导率。发现所有制备的自由基阳离子盐都是半导体。讨论了基于TTF的自由基阳离子盐与过渡金属双(双糖脂)配合物的晶体结构中的一些规律性。
In a first aspect, the present invention relates to a perovskite material comprising negatively charged layers alternated with and neutralized by positively charged layers; the negatively charged layers having a general formula selected from the list consisting of: L
n−1
M
n
X
3n+1
, L
n
M
n
X
3n+2
, and L
n−1
M′
n
X
3n+3
, and the positively charged layers comprising: one or more organic ammonium cations independently selected from monovalent cations Q and divalent cations Q′, or a polyvalent cationic conjugated organic polymer Z, wherein Q, Q′ and Z comprise each a π-conjugated system in which at least 8 and preferably at least 10 atoms participate, L is a monovalent cation, M
n
are n independently selected metal cations averaging a valence of two, M′
n
are n independently selected metal cations averaging a valence equal to 2+2/n, X is a monovalent anion, and n is larger than 1.
Multi-sulfur TTF derivatives with eight or nine sulfur atoms were synthesized for the development of new conducting organic salts. Their oxidation potentials were measured, and compared with those of the related donor molecules. The electrical conductivities of some of the ion radical salts were measured.
Both of the newly synthesized [Me3HN][Ni(dmise)2]2 and (EDTâTTF)[Ni(dmise)2] exhibit metallic behaviour around room temperature at ambient pressure; tight-binding band calculation indicates that the former has a nearly three-dimensional Fermi surface owing to a strong intersheet interaction between their selone groups.