均一系光触媒としてのポリ酸イオンの光化学と有機化合物の酸化還元反応

概要

論文の詳細を見る
Photoexcitation of the oxygen to metal charge-transfer band for alkylammonium polyoxometalates of Mo and W allows the transfer of a hydrogen-bonded proton from alkylammonium to a bridging oxygen atom at an octahedral site of the polyoxoanion and the subsequent redox reaction with water to yield reduced polyoxoanion and OH. Photoreduced polyoxoanions which exhibit oxidation potentials more negative than the reduction potential of water, lead to hydrogen generation as a result of the reduction of proton coupled with oxidation to original polyoxoanions. The significance of the highly negative oxidation potential for the photoreduced polyoxoanions can be considered in connection with the photocatalytic evolution of hydrogen from a great variety of organic molecules and their net oxidation. The polyoxometalates constitute an interesting family of potential sensitizer and relay species because of their variety of compositions and structure.
社団法人有機合成化学協会の論文