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联金属配合物（MX-或MMX-链）的电子态。从自旋磁化率增强和g值确定的Ni-Pd混合金属配合物中的Pd（III）的自旋矩诱导从π态。该结果显示出明显的配体分子依赖性。在具有二元抗衡阳离子的MMX-链络合物中，脱水引起的电子状态的可逆变化已从ESR谱的变化中证明。此外，在脱水复合物中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.