Control of electronic phases and physical properties in quasione-dimensional halogen-bridged metal complexes through the structural modifications

用电子自旋共振（ESR）技术研究了准一维卤素桥接金属配合物（MX-或mmx -链）的电子态。钯（III）的自旋矩是由Ni-Pd混合金属配合物中的非磁性态引起的，这是由自旋磁化率增强和g值确定的。这一结果显示了明显的配体分子依赖性。在二元对偶的mmx链配合物中，脱水引起的电子态可逆变化已经从ESR谱的变化中得到了证明。此外，在脱水配合物中还观察到孤子的热激发。

Electronic states of quasi-one-dimensional halogen-bridged metal complexes, so called MX- or MMX-chains, have been studied by electron spin resonance (ESR) technique. Spin moments of palladium (III) are induced from the nonmagnetic state in the Ni-Pd mixed-metal complexes as determined from the spin susceptibility enhancement and g values. This result shows clear ligand molecule dependence. In the MMX-chain complexes having binary countercations, dehydration-induced reversible change of the electronic state has been demonstrated from the change of the ESR spectrum. Furthermore, thermal excitation of soliton has been observed in the dehydrated complexes.