A supramolecular copper complex, [Cu(I)Cl0.2Br1.3(pyra-TTF)0.5+] (4) (pyra-TTF = pyrazino-tetrathiafulvalene), was synthesized by a coordination of the assembled oxidized donor ligands as the conduction paths and the disordered mixed halide anion ligands. The one-dimensional complex 4 reveals the metallic behavior down to 190 K with a resistivity minimum at 250 K and transforms to semiconducting behavior by the CDW (charge density wave) transition at 190 K with the doubling of the donor stacking c-axis. However, the complete singlet state is prohibited by the rigid 1D copper halide framework, [CuCl0.2Br1.3]n.
超分子
铜络合物[Cu(I)Cl0.2Br1.3(pyra-
TTF)0.5+] (4) (pyra-
TTF =
吡嗪四硫富瓦烯)是通过将组装的氧化供体
配体作为传导路径与无序混合卤化物阴离子
配体进行配位而合成的。一维络合物4在190 K时显示出
金属行为,电阻率在250 K时达到最小值,并在190 K时通过CDW(电荷密度波)转变转变为半导体行为,此时供体堆叠c轴加倍。然而,刚性一维
铜卤化物框架[CuCl0.2Br1.3]n禁止了完全单线态。