ELECTRON-SPIN RELAXATION RATES FOR NITRIDOCHROMIUM(V) TETRATOLYLPORPHYRIN AND NITRIDOCHROMIUM(V) OCTAETHYLPORPHYRIN IN FROZEN SOLUTION

被引：27

作者：

KONDA, R ^{[1
]}

DU, JL ^{[1
]}

EATON, SS ^{[1
]}

EATON, GR ^{[1
]}

机构：

[1] UNIV DENVER,DEPT CHEM,DENVER,CO 80208

来源：

APPLIED MAGNETIC RESONANCE | 1994年 / 7卷 / 2-3期

关键词：

D O I：

10.1007/BF03162611

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

T-l and T-m for nitridochromium(V) tetratolylporphyrin and nitridochromium(V) octaethylporphyrin were measured by saturation recovery and electron spin echo EPR, respectively, between 10 and 130 K. The temperature dependence of 1/T-l was similar to that observed previously for chromium(V) complexes of hydroxycarboxylic acids. The spin lattice relaxation rate was faster in the perpendicular plane (the porphyrin plane) than normal to this plane. 1/T-m was orientation dependent with the fastest rates observed for orientations intermediate between the principal axes. The orientation dependence of 1/T-m increased with increasing temperature and decreasing rigidity of the matrix, and is attributed to molecular motion.

引用

页码：185 / 193

页数：9

共 19 条

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