Electron spin echo studies of the internal motion of radicals in crystals: Phase memory vs correlation time
Electron spin echo studies of the internal motion of radicals in crystals: Phase memory vs correlation time
复制标题
晶体中自由基内部运动的电子自旋回波研究：相位记忆与相关时间
DOI：
10.1063/1.442775
复制
发表时间：
1982
影响因子：
4.4
通讯作者：
Meta S. Brown
中科院分区：
文献类型：
--
作者：
L. Kispert;M. Bowman;J. Norris;Meta S. Brown
的电子自旋回波（ESE）的内部运动的CH 2质子在辐照醋酸锌二水合物晶体的研究表明，定量测量的运动相关时间可以得到相当直接的脉冲测量。在慢运动极限，运动相关时间等于由ESE确定的相位记忆时间。在快速运动极限下，运动相关时间与无运动谱二阶矩除以ESE相位记忆时间成正比。ESE提供了一种方便的方法来研究运动，电子转移，导电性等在各种系统太复杂的研究普通EPR。新的系统研究ESE包括生物样品，有机聚合物，液体溶液的自由基与未解决的超精细，等运动调制大的各向异性超精细耦合时，ESE测量的相位记忆时间是敏感的调制pseudosecular超精细相互作用。
An electron spin echo (ESE) study of the internal motion of the CH2 protons in irradiated zinc acetate dihydrate crystals shows that quantitative measurements of the motional correlation time can be obtained quite directly from pulsed measurements. In the slow motional limit, the motional correlation time is equal to the phase memory time determined by ESE. In the fast motional limit, the motional correlation time is proportional to the no motion spectral second moment divided by the ESE phase memory time. ESE offers a convenient method of studying motion, electron transfer, conductivity, etc. in a variety of systems too complicated for study by ordinary EPR. New systems for study by ESE include biological samples, organic polymers, liquid solutions of radicals with unresolved hyperfine, etc. When motion modulates large anisotropic hyperfine couplings, ESE measurements of the phase memory time are sensitive to modulation of pseudosecular hyperfine interactions.