SPATIAL-DISTRIBUTION OF FREE-RADICALS IN GAMMA-IRRADIATED ALCOHOL MATRICES DETERMINED BY THE 2+1 ELECTRON-SPIN ECHO METHOD

被引:16
作者
KURSHEV, VV [1 ]
RAITSIMRING, AM [1 ]
ICHIKAWA, T [1 ]
机构
[1] ACAD SCI USSR,INST CHEM KINET & COMBUST,NOVOSIBIRSK,USSR
关键词
D O I
10.1021/j100162a025
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The magnetic dipole-dipole interaction between hydroxyalkyl radicals in gamma-irradiated glassy matrices of alcohols has been selectively detected by means of the 2+1 electron spin echo method for determining the structure of spurs generated by gamma-irradiation at 77 K. The structure is approximately the same for all the alcohols examined. One spur consists of one radical pair with an intrapair distance distribution of exp(-r6/r(0)6) and an average distance of 5 nm. It is concluded that about 40% of the initial ion pairs recombine in the spur before being stabilized in the matrices at 77 K.
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页码:3564 / 3568
页数:5
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