Photochemical cleavage of the Al–C bond of Al(TPP)(Et)(TPP = tetraphenylporphyrinato). Spin trapping of the ·Al(TPP) radical and photolysis quantum yield
Abstract
The Al–C bond of Al(TPP)(Et)(TPP = tetraphenylporphyrinato) is homolytically cleaved upon visible light photolysis in benzene in the presence of an excess of 2,4,6-tri-t-butylnitrosobenzene, yielding spin adducts of Al(TPP) and ethyl radicals with a quantum yield of the order of 10–3.