Electron Spin Resonance Study of Nitroxide Radical Adsorption at Cupric Ions in the Metal-Organic Framework Compound Cu3(btc)2

被引：22

作者：

Jee, Bettina ^{[1
]}

Koch, Kathrin ^{[1
]}

Moschkowitz, Lutz ^{[1
]}

Himsl, Dieter ^{[2
]}

Hartman, Martin ^{[2
]}

Poeppl, Andreas ^{[1
]}

机构：

[1] Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany

[2] Univ Erlangen Nurnberg, ECRC, D-91058 Erlangen, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 05期

关键词：

COMPLEXES; SPECTROSCOPY; EXCHANGE; SILICA; CU(II); EPR;

D O I：

10.1021/jz101665x

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 Cu(II) pairs In the paddle-wheel building blocks of the metal-organic frame. work compound Cu-3(btc)(2) give rise to an antiferromagnetic spin state With an electron spin resonance (ESR)-silent S = 0 ground state. However, the adsorption of di-tert-butyl nitroxide (DTBN) radicals leads to the formation of an unusual nitroxide ESR spectrum and later, upon thermal treatment of the samples, to distinct paramagnetic Cu(II) centers, whose ESR signals can be observed at temperatures below 70 K. Various Scenarios for the suppression of the antiferromagnetic coupling of the Cu(II) ions in the paddle wheel units by interaction with the nitroxide and the subsequent formation of these S = 1/2 copper centers are discussed.

引用

页码：357 / 361

页数：5

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