Abstract
The mechanism of photochemical interconversion of white 2,3-diphenylindenone oxides to their red valence tautomers (1,3-diphenyl-2-benzopyrylium-4-oxides) was studied by quantum yield measurements of the photo-isomerization at room and lower temperatures and in the presence of quenchers. With all the derivatives studied, a ground state intermediate of the photoisomerization was stabilized at 77 K confirming previous flash photolysis work. The results indicate a diabatic transition via a 1n-π* state.
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Schedule a callMore From: Journal of photochemistry and photobiology. A, Chemistry
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