The mechanism of electron-cation geminate recombination in liquid isooctane
Date
2005
Authors
Zhang, T.
Lee, Y.
Kee, T.
Barbara, P.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Chemical Physics Letters, 2005; 403(4-6):257-261
Statement of Responsibility
Tieqiao Zhang, Young Jong Lee, Tak W. Kee and Paul F. Barbara
Conference Name
Abstract
Electron-cation geminate recombination in isooctane has been reinvestigated by femtosecond spectroscopy. The observed recombination kinetics are well-fit by a single exponential decay (τ = 400 ± 40 fs) and exhibit a significant hydrogen/deuterium kinetic isotope effect. The kinetics are not affected by varying the incident intensity or by exciting the recombining electrons with a high power 800 nm pulse. These observations strongly suggest that the recombination rate is not limited by diffusive motion of the ions to form a contact ion pair, but rather by the electron transfer reaction rate between the ions in a contact ion pair. © 2005 Elsevier B.V. All rights reserved.