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Photochemical Studies in Flash Photolysis IV. Intensity and Wavelength Effects

Shilman, A. and Marcus, R. A. (1962) Photochemical Studies in Flash Photolysis IV. Intensity and Wavelength Effects. Bulletin des Sociétés Chimiques Belges, 71 (11-12). pp. 653-659. ISSN 0037-9646. doi:10.1002/bscb.19620711105.

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Wavelength and intensity effects which we have observed in the flash photolysis of acetone are reviewed. Marked nonmonotonic wavelength effects occurred in the different regions investigated (260, 280 and 300 mμ) and serve to emphasize the problem of interpreting any data obtained with unfiltered light. The data at 300 mμ were compared with those obtained with continuous light sources 10^6 fold less intense. A considerable difference occurred in the C_2H_6/CO ratio. To investigate this intensity effect, flash photolyses were made over a wide range of reduced intensities, as low as 10^4 fold less than the maximum one, and the transition intensity region for change in C_2H_6/CO ratio and CO quantum yield was located. This phenomenon illustrates the more general fact that the apparent primary processes observed at typical flash intensities need not be the same as the primary processes found at low intensities

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Marcus, R. A.0000-0001-6547-1469
Additional Information:© 1962 Wiley-VCH Verlag. Manuscript Received: 18 Jun 1962. We are particularly indebted to Professor Norman Peterson of this laboratory who designed and constructed the repetitive flash apparatus. His many suggestions were most helpful to us during the course of this work. This research was supported by the Directorate of Chemical Sciences Air Force Office of Scientific Research and by the Alfred P. Sloan Foundation.
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Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Issue or Number:11-12
Record Number:CaltechAUTHORS:20150930-095907747
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Official Citation:Shilman, A. and Marcus, R. A. (1962), Photochemical Studies in Flash Photolysis IV. Intensity and Wavelength Effects. Bull. Soc. Chim. Belges, 71: 653–659. doi: 10.1002/bscb.19620711105
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60602
Deposited By: Ruth Sustaita
Deposited On:30 Sep 2015 18:55
Last Modified:10 Nov 2021 22:36

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