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Published January 1958 | public
Journal Article

Studies of chemical reactions of excited species using intense light sources

Abstract

The use of measurements of the products of flash photolysis as a means for studying the reactions of electronically-excited molecules is discussed. With intense light sources the problem of isolating these reactions from others involving free radicals is simplified. The flash sources also have their limitations, and misleading information which can result from the presence of inert gases is noted. A diagnostic test is proposed for detecting the effects (if any) of a possible adiabatic temperature rise of the flash. Some recent studies in the author's laboratory are summarized. Evidence is presented that in the flash photolysis of acetone acetyl radicals arise from an excited molecule. Several deactivation processes are described and compared with results from fluorescence studies.

Additional Information

© 1958 National Research Council Canada. Manuscript received August 16, 1957. This paper was presented at the Symposium on the Structure and Reactivity of Electronically-Excited Species held at the University of Ottawa, Ottawa, Canada, September 5 and 6, 1957. A second paper presented at the Symposium, on the theory of internal conversion or dissociations of excite molecules, will be published elsewhere. This research was supported by the United State Air Force under Contract No. AF 33 (616) 3887, monitored by WCRRC, Aeronautical Research Laboratory, Wright Air Development Center.

Additional details

Created:
August 19, 2023
Modified:
October 23, 2023