Radical Pair Kinetics in the Hydrogen Abstraction of Benzophenone Derivatives in Micellar Solutions, Studied by Pulsed Microwave Irradiation

2001 ◽  
Vol 105 (16) ◽  
pp. 4010-4018 ◽  
Author(s):  
Jonathan R. Woodward ◽  
Yoshio Sakaguchi
Keyword(s):  
Microwave Irradiation ◽  
Radical Pair ◽  
Hydrogen Abstraction ◽  
Micellar Solutions

Two independent isotope effects and their magnetic field dependences in the photoreduction of menadione in deuterium labeled SDS micellar solutions. A spin trapping study

1988 ◽  
Vol 66 (8) ◽  
pp. 1832-1835 ◽  
Author(s):  
Masaharu Okazaki ◽  
Kazumi Toriyama ◽  
Keichi Nunome ◽  
Hachizo Muto ◽  
Takeshi Shiga
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Isotope Effect ◽  
Radical Pair ◽  
Isotope Effects ◽  
Hydrogen Abstraction ◽  
The Other ◽  
Spin Adduct ◽  
Micellar Solutions ◽  
Intermediate Radical

Spin adduct yields in the photoreduction of menadione (2-methylnaphthoquinone) in isotope labeled micellar solutions were measured as functions of the external magnetic field. As surfactants, ordinary SDS, perdeuteriated SDS, and a mixture of the two were employed. In a mixed micellar solution, a normal isotope effect on the spin adduct yield was observed. On the other hand, in the pure micellar solutions with each of the former two surfactants, a reversed isotope effect was observed. These two apparent isotope effects depend on the external magnetic field and were separated into two independent isotope effects: one is the primary isotope effect on the hydrogen abstraction step and the other is the secondary magnetic isotope effect on the intersystem crossing step of the intermediate radical pair.

Control of radical pair lifetimes by microwave irradiation. Application to photosynthetic reaction centres

1996 ◽  
Vol 253 (3-4) ◽  
pp. 361-366 ◽  
Author(s):  
Sergei A. Dzuba ◽  
Ivan I. Proskuryakov ◽  
Robert J. Hulsebosch ◽  
Martin K. Bosch ◽  
Peter Gast ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Radical Pair ◽  
Reaction Centres
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