Accession Number:

AD0688928

Title:

FLUORESCENCE LIFETIMES OF PYRENE MONOMER AND EXCIMER AT HIGH PRESSURES.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA UNIV SANTA BARBARA DEPT OF CHEMISTRY

Report Date:

1969-01-02

Pagination or Media Count:

7.0

Abstract:

The fluorescence lifetimes of a number of aromatic hydrocarbons are shortened by 15-40 when the matrix is compressed by 30 kbar pressure. The causes of environmentally-induced lifetime shortening may be further illuminated by a detailed study of one solute under a variety of conditions. The document reports on such a study of pyrene and in addition, compares the pressure-enhanced electronic relaxation for the monomeric and excimeric forms of pyrene. The work established the magnitude of environmental influences on the singlet lifetime of pyrene and demonstrated a remarkable insensitivity of the emitting species to the nature of the microscopic surroundings, be it monomer or excimer.

Subject Categories:

  • Radiation and Nuclear Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE