Accession Number : AD0778696

Title :   Photochemistry of Perfluorocyclobutanone.

Descriptive Note : Interim rept. 1 Apr 73-31 Mar 74,

Corporate Author : CALIFORNIA UNIV IRVINE DEPT OF CHEMISTRY

Personal Author(s) : Lewis,Roger ; Lee,Edward K. C.

Report Date : 03 MAY 1974

Pagination or Media Count : 6

Abstract : Primary photochemical transformations of perfluorocyclobutanone in its first excited state have been investigated at low pressures. The results of fluorescence decay time measurements, fluorescence excitation spectroscopy, direct photolysis at varying wavelengths and triplet benzene photosensitization indicate that (1) intersystem crossing is most important at low excitation energies, (2) internal conversion dominates at high excitation energies, and (3) the photodecomposition mechanisms are similar to those proposed recently for cyclobutanone but differ significantly from that for perfluorocyclobutanone proposed earlier by Phillips. (Modified author abstract)

Descriptors :   *Photochemical reactions, Cyclic compounds, Fluorescence, Photolysis, Molecular energy levels, Electron transitions, Ketones, Fluorine compounds

Subject Categories : Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE