过渡金属吡啶配离子的TCNQ电荷转移盐的合成和物理性质

合成了通式为M(Py)_m]TCNQ]_n(M=Mn,m＝4;M＝Co,Ni,Cu,m＝2;TCNQ＝7,7,8,8-四氰基对苯醌二甲烷,n＝2,3)的8个过渡金属吡啶配离子的TCNQ电荷转移盐,通过元素分析、红外光谱、顺磁共振谱、光电子能谱、磁化率和电导率对这些电荷转移盐进行了表征,结果表明,在这些电荷转移盐分子中存在TCNQ^-和TCNQ⁰,且TCNQ^-与TCNQ⁰相互作用形成结构单元TCNQ]_n^2-(n＝2,3),各个结构单元沿一维方向堆积形成分子柱,部分电荷从TCNQ]_n^2-向M(Py)_m]²⁺转移,导致化合物中的金属表现为混合价态.其中3个电荷转移盐具有良好的导电性.

Synthesis and Physical Properties of TCNQ Charge-transfer Salts of Transition-metal Pyridine Complex Cations

Eight TCNQ charge transfer salts of transition metal pyridine complex cations with the general formula M(Py) m ] n (M=Mn, m =4; M=Co, Ni, Cu, m =2; TCNQ= 7,7,8,8 tetracyanoquinodimethane, n =2,3) have been synthesized and characterized by elemental analysis, IR spectrum, ESR spectrum, X ray photoelectron spectrum, magnetic susceptibility and electrical conductivity. The results indicate that there are TCNQ - and TCNQ 0 in the molecules of these charge transfer salts; TCNQ - interacts with TCNQ 0 to form a structural unit 2- n (n =2,3); these structural units stack along with one dimension direction to form molecular column; it leads the metals of these compounds to mixed valence state because partial charges transfer from 2- n to M(Py) m ] 2+ ; three of these charge transfer salts show a good electrical conductivity.