We attempt to describe our picosecond iodine recombination data using simple diffusion theory. The physical picture is simple. Recombination of iodine atoms is the result of the diffusive motion of two iodine atoms, with such parameters as viscosity and temperature together with the diffusion theory governing the motion. The difference between most tests of diffusion theory and the present one is the extremely short time scale of our experimental data. We are thus close to, if not already in, the regime where the solvent structure is noncontinuous. In this regime the fundamental hypothesis of diffusion theory is invalid and one would not expect diffusion theory to be valid. We compare several different formulations of the diffusion equation solutions using different boundary conditions. The comparisons of each of these treatments with the experimental data fails. A discussion of the implications of this result, as well as some suggestions for improving the applicability of diffusion theory is presented.

Chemischer InformationsdienstVolume 13, Issue 42 Article ChemInform Abstract: DIFFUSIVE AND NONDIFFUSIVE TIME SCALES IN THE DISSOCIATION AND RECOMBINATION OF MOLECULAR IODINE IN LINEAR ALKANES C. A. LANGHOFF, C. A. LANGHOFFSearch for more papers by this authorB. MOORE, B. MOORESearch for more papers by this authorM. DEMEUSE, M. DEMEUSESearch for more papers by this author C. A. LANGHOFF, C. A. LANGHOFFSearch for more papers by this authorB. MOORE, B. MOORESearch for more papers by this authorM. DEMEUSE, M. DEMEUSESearch for more papers by this author First published: October 19, 1982 https://doi.org/10.1002/chin.198242089Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume13, Issue42October 19, 1982 RelatedInformation