一种含甲氧基-TEMPO自由基的钆（III）配合物中的强反铁磁相互作用：耦合与钆-氧-氮角度之间的关系
Strong Antiferromagnetic Interaction in a Gadolinium(III) Complex with Methoxy-TEMPO Radical: A Relation between the Coupling and the Gd-O-N Angle.
作者信息
Nakamura Takeshi, Kanetomo Takuya, Ishida Takayuki
机构信息
Department of Engineering Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan.
Department of Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
出版信息
Inorg Chem. 2021 Jan 18;60(2):535-539. doi: 10.1021/acs.inorgchem.0c02568. Epub 2020 Dec 31.
A new compound [Gd(hfac)(MeOTEMPO)(MeOH)] (MeOTEMPO = 4-methoxy-2,2,6,6-tetramethylpiperidin-1-oxyl) was prepared. From the X-ray crystal structure analysis, the Gd-O-N angle is 170.9(3)°. The magnetic study clarified the Gd-radical interaction with 2/ = -26.6(3) K (in the = -2· convention), which corresponds to one of the strongest antiferromagnetic couplings in the Gd-nitroxide systems. Wider Gd-O-N angles seem to favor stronger antiferromagnetic couplings.
制备了一种新化合物[Gd(hfac)(MeOTEMPO)(MeOH)]（MeOTEMPO = 4-甲氧基-2,2,6,6-四甲基哌啶-1-氧基）。通过X射线晶体结构分析，钆-氧-氮角为170.9(3)°。磁性研究表明钆与自由基的相互作用为J = -26.6(3) K（在J = -2·约定中），这对应于钆-氮氧化物体系中最强的反铁磁耦合之一。更宽的钆-氧-氮角似乎有利于更强的反铁磁耦合。
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