Photochemical activation and splitting of H2O, CO2, and N2 induced by CT excitation of redoxactive metal complexes

摘要: Abstract The cleavage of the ubiquitous and abundant molecules H2O, CO2 (or CO32−, respectively) N2 is considerable interest. Owing to their stability this splitting should be facilitated by light may thus applied for solar energy utilization. Under ambient conditions direct photocleavage can certainly not accomplished but assistance suitable redox-active metal complexes conceivable. Light absorption induce charge redistribution between split. CT excitation expected initiate generation redox products in first photochemical step. Indeed, couples OsIICp2/OsIVCp2 with Cp = cyclopentadienyl anion, Cu(I)/Cu(II) OsIIN2OsIII/OsVI(N) have been successfully photo cleave CO32− N2, respectively. Future attempts are directed improve efficiency these photoreactions. In particular, inclusion such reactions photocatalytic cycles a challenging task.