Observation of the single-ion magnet behavior of d(8) ions on two-coordinate Co(I)-NHC complexes

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	Observation of the single-ion magnet behavior of d(8) ions on two-coordinate Co(I)-NHC complexes
	Meng YS(孟银杉)1; Mo ZB(莫贞波)1; Wang BW(王炳武)1; Zhang YQ(张义权)1; Deng L(邓亮)1; Gao S(高松)1
刊名	Chem. Sci.
	2015
卷号	6 期号:12 页码:7156-7162
其他题名	两配位一价钴卡宾配合物的单分子磁性质研究
通讯作者	张义权 ; 邓亮 ; 高松
英文摘要	The slow magnetic relaxation typical for single-ion magnets has been known for certain low-coordinate 3d metal complexes with d(6), d(7), and d(9) electronic configurations, but never for d(8) complexes. Herein, we report a study on two-coordinate d(8) cobalt(I)-N-heterocyclic carbene complexes, for which slow magnetic relaxation behavior was observed for [Co(IMes)(2)][BPh4] (IMes: 1,3-dimesitylimidazol-2-ylidene) under an applied dc field. The system represents the first d(8) single-ion magnet, and features a fitted energy barrier of U-eff = 21.3 cm(-1) and pre-exponential factor of tau(0) = 6.6 x 10(-6) s. The analog two-coordinate cobalt(I) complexes with different NHC ligands, [Co(sIMes)(2)][BPh4] (sIMes: 1,3-dimesitylimidazolin-2-ylidene) and [Co(IAd)(2)][BAr4F] (IAd: 1,3-dimesitylimidazol-2-ylidene; BAr4F: tetra(3,5-ditrifluoromethylphenyl)borate), do not show such single-ion magnet behaviour. Ab initio calculations imply that the dihedral angle between the two NHC planes and the degree of unsaturation of the NHC ligands can dramatically alter the D value of the two-coordinate cobalt(I)-NHC ions, possibly via changing of the Co-NHC pi-interactions, and hence affect the spin-orbit coupling splitting.
学科主题	金属有机化学
收录类别	SCI
原文出处	http://dx.doi.org/10.1039/c5sc02611c
语种	英语
WOS记录号	WOS:000365225300056
内容类型	期刊论文
源URL	[http://ir.sioc.ac.cn/handle/331003/39671]
专题	上海有机化学研究所_金属有机化学国家重点实验室
作者单位	1.北京大学 2.中科院上海有机化学研究所, 金属有机化学国家重点实验室 3.南京师范大学
推荐引用方式 GB/T 7714	Meng YS,Mo ZB,Wang BW,et al. Observation of the single-ion magnet behavior of d(8) ions on two-coordinate Co(I)-NHC complexes[J]. Chem. Sci.,2015,6(12):7156-7162.
APA	孟银杉,莫贞波,王炳武,张义权,邓亮,&高松.(2015).Observation of the single-ion magnet behavior of d(8) ions on two-coordinate Co(I)-NHC complexes.Chem. Sci.,6(12),7156-7162.
MLA	孟银杉,et al."Observation of the single-ion magnet behavior of d(8) ions on two-coordinate Co(I)-NHC complexes".Chem. Sci. 6.12(2015):7156-7162.