Accession Number:

AD0711068

Title:

TEMPERATURE EFFECTS ON THE LUMINESCENCE OF BENZOPHENONE IN POLYMERS,

Descriptive Note:

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s):

• Jones,Peter F.
• Calloway,A. Ray

Report Date:

1970-07-01

Pagination or Media Count:

13.0

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