Magnetic Field Effects Due to the g Mechanism upon Chemical Reactions through Radical Pairs under Ultrahigh Fields of up to 3
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- 作者：Masanobu Wakasa ; Kiyoshi Nishizawa ; Haruo Abe ; Giyuu Kido ; and Hisaharu Hayashi
- 刊名：Journal of the American Chemical Society
- 出版年：1999
- 出版时间：October 6, 1999
- 年：1999
- 卷：121
- 期：39
- 页码：9191 - 9197
- 全文大小：96K
- 年卷期：v.121,no.39(October 6, 1999)
- ISSN：1520-5126
文摘
Magnetic field effects (MFEs) due to the isotropic 
g mechanism were studied for the hydrogenabstraction reactions of 4-methoxy-benzophenone with thiophenol in several solvents at 293 K by a laser flashphotolysis technique under ultrahigh magnetic fields of up to 30 T. In 2-propanol, ethanol, and methanol, theyield of the escaped ketyl radical decreased with increasing magnetic field from 0 to 30 T. In 2-methyl-1-propanol, however, the decrease was almost saturated at 20 T and the yield above 20 T reduced to be 2/3 ofthat at 0 T. Such saturation of the MFEs due to the isotropic g mechanism in the reaction through radicalpairs in solution was found for the first time.
g mechanism were studied for the hydrogenabstraction reactions of 4-methoxy-benzophenone with thiophenol in several solvents at 293 K by a laser flashphotolysis technique under ultrahigh magnetic fields of up to 30 T. In 2-propanol, ethanol, and methanol, theyield of the escaped ketyl radical decreased with increasing magnetic field from 0 to 30 T. In 2-methyl-1-propanol, however, the decrease was almost saturated at 20 T and the yield above 20 T reduced to be 2/3 ofthat at 0 T. Such saturation of the MFEs due to the isotropic g mechanism in the reaction through radicalpairs in solution was found for the first time.