Photochemically induced dynamic nuclear polarization (photo-CIDNP) of angular dibenzacridines

Abstract

Photoreduction of angular dibenzacridlines in proton-donor solvents has been investigated by means of chemically induced dynamic nuclear polarization (CIDNP). The result show that the position of the angular benzo-group directly influences the reaction scheme. Polarization of the starting materials has been observed during irradiation in benzene solution. The origin of these polarizations is discussed.