EPR Study of Ligand Effects in Spin Triads of Bis(o-Semiquinonato)Copper(II) Complexes

被引：9

作者：

Veber, Sergey L. ^{[1
,2
]}

Fedin, Matvey V. ^{[1
]}

Fokin, Sergey V. ^{[3
]}

Sagdeev, Renad Z. ^{[1
]}

Ovcharenko, Victor I. ^{[3
]}

Bagryanskaya, Elena G. ^{[1
]}

机构：

[1] Int Tomog Ctr SB RAS, Lab Magnet & Spin Phenomena, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

[3] Int Tomog Ctr SB RAS, Lab Multispin Coordinat Cpds, Novosibirsk 630090, Russia

来源：

APPLIED MAGNETIC RESONANCE | 2010年 / 37卷 / 1-4期

基金：

俄罗斯基础研究基金会;

关键词：

HIGH-FIELD EPR; 2-HYDROXYGLUTARYL-COA DEHYDRATASE; ACIDAMINOCOCCUS FERMENTANS; EXCHANGE INTERACTION; BREATHING CRYSTALS; EASYSPIN; CLUSTERS; SPECTRA;

D O I：

10.1007/s00723-009-0087-2

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：

We report the X-band (9 GHz) electron paramagnetic resonance (EPR) study of series of bis(o-semiquinonato)copper(II) complexes with different ligands. It was found previously, that exchange interactions in spin triads of these compounds are very sensitive to the structure of the ligand coordinated to the central copper(II) ion. Ligand moderates the copper-radical and radical-radical exchange interactions and strongly changes the magnetic properties of the compound. Depending on a ligand, ferromagnetic or antiferromagnetic character of exchange dominates in the system. The EPR study of these complexes allowed us to obtain information on zero-field splitting parameters and their distributions in the studied compounds. The EPR results compliment previously obtained spectroscopic data on these compounds and suggest the pronounced plasticity of the clusters manifested in the broad distributions of their rhombicity parameters.

引用

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页码：693 / 701

页数：9

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