Photochemistry and photophysics of hexafluoroacetone vapor at low pressures

Abstract

18) The total organic product yield (TOPY) is the fraction of 128I activity organically bound and is equal to OA/(OA + IA) X 100% where OA is the activity of the organic fraction and IA is the activity of the inorganic fraction of the extracted sample after corrections for isotopic decay. Individual organic product yield (IOPY) values represent the fraction of activity chemically bound with a specific organic substrate. Integration of radiogas chromatographic peaks, corrected for isotope decay and radiolytic contributions and normalized to the TOPY value, are used in the assignment of these values.(19) W. E.

Electronic relaxation processes in acetone and 1,1,1-trifluoroacetone vapor and the gas phase recombination of the acetyl radical at 22.degree.C

“…The failure to observe long-lived triplet states at short excitation wavelengths may be explained in two ways, by an increase in excited singlet state nonradiative processes other than intersystem crossing,23 or by a decrease in vibrationally excited triplet lifetime. 30 We have advanced evidence which supports the second possibility.…”