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Article Abstract
Through-space electrical conduction in paddlewheel-type homovalent dinuclear complexes remains poorly understood, despite the numerous reports on these complexes. Herein, the electrical conduction of new Ru(II,II) complexes with 2-pyrenecarboxylate (pyrCOO) ligands, [Ru(pyrCOO)X] ⋅ n(X) (where X=DMF (Ru-DMF), NMP (Ru-NMP), DMA (Ru-DMA)), was investigated. The dimensionality of π-stacking interactions between discrete molecules in Ru-DMA is higher (two-dimensional) than in Ru-DMF and Ru-NMP (stair-like one-dimensional). Nevertheless, Ru-DMF, which contains a slight amount of organic radicals, exhibited the highest electrical conductivity. This suggests that the large overlap and high dimensionality of π-stacking interactions among the complexes, along with a slight organic radical impurity, contribute to the increased electrical conductivity.
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