Systematic Investigation of the Nature of The Coupling between a Ln(III) Ion (Ln = Ce(III) to Dy(III)) and Its Aminoxyl Radical Ligands. Structural and Magnetic Characteristics of a Series of {Ln(organic radical)<sub>2</sub>} Compounds and the Related {Ln(Nitrone)<sub>2</sub>} Derivatives
作者:Myrtil L. Kahn、Jean-Pascal Sutter、Stéphane Golhen、Philippe Guionneau、Lahcène Ouahab、Olivier Kahn、Daniel Chasseau
DOI:10.1021/ja994175o
日期:2000.4.1
Numerous molecular compounds in which a paramagnetic Ln(III) ion is in interaction with a second spin carrier such as a transition metal ion or an organic radical have been described. However, except for the isotropic Gd(III) ion, very little is known concerning the nature (ferro- or antiferromagnetic) and mechanism of the interaction involving a Ln(III) ion. This study addresses the problem of the
已经描述了许多分子化合物,其中顺磁性 Ln(III) 离子与第二自旋载体(例如过渡金属离子或有机自由基)相互作用。然而,除了各向同性的 Gd(III) 离子,关于与 Ln(III) 离子相互作用的性质(铁磁性或反铁磁性)和机制知之甚少。该研究解决了显示自旋轨道耦合的 Ln(III) 离子与有机自由基之间相互作用的问题。一系列同构化合物 Ln(organic Radial)2(NO3)3} 的磁性,包含一个 Ln(III) 离子(Ln = Ce 到 Dy),被两个 N,O 螯合氨氧基自由基(3-硝酰硝基氧-4,5-二甲基三唑)已进行了研究。用于深入了解这些化合物中发生的 Ln-Radical} 耦合的实验方法是基于对金属离子固有顺磁性贡献的了解。这一贡献是从相应的 Ln(Nitrone)2(NO3)...