Photochemistry of pyrenylmethyltriphenyl-phosphonium salts and related compounds

1985 
Abstract Pyrenylmethyltriphenylphosphonium salts in alcoholic solutions undergo photochemical solvolysis to form the corresponding alkoxymethylpyrene and triphenylphosphine compounds in high yield. The analogous naphthylmethyl compounds also undergo similar reactions. The corresponding tri- n -butylphosphonium salts, however, are photostable under the same conditions. The first excited singlet is probably involved in the reaction. The photophysical properties of the pyrenyl compounds have been measured and the triplet states have been recorded.
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