THE ELECTRON-PARAMAGNETIC RESONANCE-SPECTRUM OF AG-3(2+)

被引：28

作者：

VANDERPOL, A ^{[1
]}

REIJERSE, EJ ^{[1
]}

DEBOER, E ^{[1
]}

WASOWICZ, T ^{[1
]}

MICHALIK, J ^{[1
]}

机构：

[1] INST NUCL CHEM & TECHNOL,DEPT RADIAT CHEM & TECHNOL,PL-03195 WARSAW,POLAND

来源：

MOLECULAR PHYSICS | 1992年 / 75卷 / 01期

关键词：

D O I：

10.1080/00268979200100041

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：

A highly resolved EPR spectrum of the silver trimer Ag-109(3)2+, present in Ag-109(1)-NaA zeolite, has been measured. The spectrum is characterized by an axially symmetric spin Hamiltonian having g parallel-to = 1.958 (+/- 1), g perpendicular-to = 1.981 (+/- 1) and for each of the Ag-109 nuclei A parallel-to = 200 (+/- 1) x 10(-4) cm-1 and A perpendicular-to = 205 (+/- 1) x 10(-4) cm-1. The g and hyperfine anisotropy are clearly resolved in the spectrum. The results are compared with theoretical calculations available in the literature. The axial symmetry of the spectrum is attributed to rapid reorientation of the trimer about its threefold axis, so that effects of rhombicity of the hyperfine tensor are averaged out. Between 180 K and 140 K the spectrum changes due to a decrease of the reorientation rate.

引用

页码：37 / 42

页数：6

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