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Magnetic-field-dependent recombination kinetics of geminate radical pairs in reversed micelles of variable size

โœ Scribed by Thomas Ulrich; Ulrich E. Steiner

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
524 KB
Volume
112
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The magnetic-field-dependent kinetics of geminate radical pairs, created by electron transfer from aniline fo rhionine triplet in reversed micelles has been studied by nanosecond laser flash spectroscopy. Dependin, = on the water concentration, the rate constant of intrarnicek recombination is reduced by a factor between 2.4 and 3.2 in a field of 1 T. The B,, values increase from about 15 to 48 mT when the water-pool radius is increased by a factor of 4. The experimental results demonstrate that triplet-singlet transitions cannot be rate dete rmining in zero field. However, Tk -+ To and Ti -S radical pair spin relaxution must become rate determining as the magnetic field is increased above 10 mT_

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