Accession Number : AD0764959

Title :   Naphthalene-d8 Phosphorescence in Pressure-Perturbed Media at 70K.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV SANTA BARBARA DEPT OF CHEMISTRY

Personal Author(s) : Beardslee,R. A. ; Offen,H. W.

Report Date : JUL 1973

Pagination or Media Count : 17

Abstract : The phosphorescence spectrum and triplet lifetime of naphthalene-d8 have been measured as a function of pressure (1 atm-35 kbar) at 77K in five matrices: poly(methylmethacrylate), EPA (ether-isopentane-alcohol), perfluoromethylcyclohexane, pentane and benzophenone. Compression of these matrices results in strong spectral broadening which is attributed to increased solvent inhomogeneity and enhanced coupling with the lattice. The pressure-induced shift in the triplet energy is sensitive to the detailed interactions of host molecules with the solute molecule, and provides qualitative attitudes about the various types of interactions responsible for solvent perturbations of electronic processes. (Author)

Descriptors :   (*NAPHTHALENES, *FLUORESCENCE), ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, ORGANIC SOLVENTS, HIGH PRESSURE, CRYOGENICS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE