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具有正各向异性的六配位单核钴(II)配合物中的场诱导缓慢磁弛豫。

Field-induced slow magnetic relaxation in a six-coordinate mononuclear cobalt(II) complex with a positive anisotropy.

机构信息

Instituto de Ciencia Molecular (ICMOL), Universitat de València, 46980 Paterna, València, Spain.

出版信息

J Am Chem Soc. 2012 Sep 26;134(38):15704-7. doi: 10.1021/ja3075314. Epub 2012 Sep 14.

DOI:10.1021/ja3075314
PMID:22963111
Abstract

The novel mononuclear Co(II) complex cis-[Co(II)(dmphen)(2)(NCS)(2)]·0.25EtOH (1) (dmphen = 2,9-dimethyl-1,10-phenanthroline) features a highly rhombically distorted octahedral environment that is responsible for the strong positive axial and rhombic magnetic anisotropy of the high-spin Co(II) ion (D = +98 cm(-1) and E = +8.4 cm(-1)). Slow magnetic relaxation effects were observed for 1 in the presence of a dc magnetic field, constituting the first example of field-induced single-molecule magnet behavior in a mononuclear six-coordinate Co(II) complex with a transverse anisotropy energy barrier.

摘要

新型单核 Co(II) 配合物顺式-[Co(II)(dmphen)(2)(NCS)(2)]·0.25EtOH（1）（dmphen = 2,9-二甲基-1,10-菲啰啉）具有高度扭曲的八面体环境，这是高自旋 Co(II) 离子强的轴向和菱形磁各向异性的原因（D = +98 cm(-1) 和 E = +8.4 cm(-1)）。在直流磁场存在的情况下，1 表现出缓慢的磁弛豫效应，这是首例具有横向各向异性能垒的单核六配位 Co(II) 配合物中磁场诱导的单分子磁体行为的实例。

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