Abstract
Abstract : Using rigid polymer matrices, it was possible to confirm that benzophenone exhibits a delayed thermal fluorescence at 300K and have shown that the spectrum of this emission is an approximate mirror image of the structured singlet-singlet n,pi* absorption spectrum. Lifetimes of benzophenone in various polymers of styrene and its derivatives at 300K are compared with the previously reported lifetime in benzene. It was concluded that, if solvent-solute interactions are responsible for the anomalously short phosphorescence lifetime in benzene, then this interaction has a strong steric requirement. (Author)
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