Accession Number : AD0711068

Title :   TEMPERATURE EFFECTS ON THE LUMINESCENCE OF BENZOPHENONE IN POLYMERS,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Jones,Peter F. ; Calloway,A. Ray

Report Date : 01 JUL 1970

Pagination or Media Count : 13

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)

Descriptors :   (*BENZOPHENONES, *LUMINESCENCE), (*ULTRAVIOLET SPECTRA, BENZOPHENONES), KETONES, RELAXATION TIME, SOLVENT ACTION, POLYMERS, (U)POLYMERS

Subject Categories : Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE