Carbon Monoxide Ligand-Exchange Reaction of Triruthenium Cluster Complexes Induced by Photosensitized Electron Transfer: A New Type of Photoactive CO Color Sensor

Abstract

Oxo-acetato-bridged triruthenium cluster complexes ([Ru3(mu3-O)(mu-CH3CO2)6(L1)(L2)2](+/0)) show various color changes with variations of the total charge of the cluster complexes and terminal ligands. After photosensitized electron transfer via the triplet excited state of zinc tetraphenylporphyrin, the change of the formal oxidation state of the ruthenium ion allowed coordination with the carbon monoxide ligand accompanying the color changes.