PRESSURE DEPENDENCE OF BENZOPHENONE PHOSPHORESCENCE.
Abstract
The phosphorescence spectrum, intensity and lifetime of benzophenone have been studied at 77K as a function of pressure (0-30 kbar) in EPA, polymethylmethacrylate (PMMA), and polyethylene (PE). At 30 kbar the triplet energy is raised 90/cm in EPA and lowered about 460/cm in PMMA and PE, according to the pressure-induced, reversible shift of the band origin. The triplet lifetime in EPA is reduced from 5.8 to 4.5 msec at 30 kbar pressure. A decrease in phosphorescence intensity suggests that the radiative transition probability diminishes under pressure. The intensity decay becomes strongly nonexponential in polymer matrices under compression. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 20, 1969
- Accession Number
- AD0698261
Entities
People
- H. W. Offen
- J. D. Simpson
Organizations
- University of California, Santa Barbara