Two state electron model for geminate recombination of electron–ion pairs in liquid isooctane

M + n · hν → mobile electron → trapped electron → free charges. [Display omitted] ► Electrons produced by ionization of liquid alkanes are trapped near positive ions. ► The recombination kinetics was expressed in terms of a trapped electron life time. ► Transient absorption after the ionizing pulse...

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Bibliographic Details
Published in:Chemical physics 2011-04, Vol.382 (1), p.58-67
Main Authors: Lukin, L.V., Yakovlev, B.S.
Format: Article
Language:English
Subjects:
Charge recombination and separation
Chemical reaction kinetics
Femtosecond laser spectroscopy
Photoionization
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Summary:M + n · hν → mobile electron → trapped electron → free charges. [Display omitted] ► Electrons produced by ionization of liquid alkanes are trapped near positive ions. ► The recombination kinetics was expressed in terms of a trapped electron life time. ► Transient absorption after the ionizing pulse was analyzed for liquid isooctane. ► The life time of trapped electrons was found. Recombination kinetics of geminate electron–ion pairs is considered in the framework of the two state model for electron transport in liquid hydrocarbons. It is shown that the model well reproduces recent experimental data on the subpicosecond geminate recombination obtained in liquid isooctane. The life time of electrons in a localized state in isooctane is estimated to lie in the range between 0.14 ps and 0.57 ps at room temperature.
ISSN:0301-0104
DOI:10.1016/j.chemphys.2011.02.011