Series of Lanthanide Organometallic Single-Ion Magnets

doi:10.1021/ic202511n

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	Series of Lanthanide Organometallic Single-Ion Magnets
	Jiang, Shang-Da; Liu, Shan-Shan; Zhou, Li-Nan; Wang, Bing-Wu; Wang, Zhe-Ming; Gao, Song
刊名	INORGANIC CHEMISTRY
	2012-03-05
卷号	51 期号:5 页码:3079-3087
ISSN号	0020-1669
DOI	10.1021/ic202511n
英文摘要	The synthesis, structures, and magnetic properties of a series of lanthanide organometallic mixed sandwich molecules, (Cp)Ln(COT), are investigated, where Cp is the pentamethylcyclopentadiene anion and COT is the cyclooctatetraene dianion and Ln represents Tb-III, Dy-III, Ho-III, Er-III, and Tail Among the five complexes, Dy and Ho complexes are determined to be single-ion magnets in addition to the previously reported Er complex. Both Dy and Ho complexes show obvious quantum tunneling magnetization relaxation in the absence of a static field. The diluted Ho complex behaves two sets of thermally activated relaxation as we reported previously in Er due to the COT ring static disorder. A stair-shaped hysteresis for the Er compound can be observed at 1.6 K with Hc = 1 kOe at a sweeping rate over 700 Oe/s. The quantum tunneling decoherence relaxation rate increases from Er to Ho to Dy, which may be caused by the relative increase of transverse anisotropy coming from the larger tilting of the two aromatic rings within the molecule. The fine electronic structure is analyzed with ligand-field theory employing the effective Hamiltonian method. The zero-field splitting is determined to be Ising type, and the energy gap between the ground state and the first excited one is consistent with the barrier obtained by Arrhenius analysis.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000301007100043
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/48135]
专题	中国科学院化学研究所
通讯作者	Wang, Bing-Wu
作者单位	Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Shang-Da,Liu, Shan-Shan,Zhou, Li-Nan,et al. Series of Lanthanide Organometallic Single-Ion Magnets[J]. INORGANIC CHEMISTRY,2012,51(5):3079-3087.
APA	Jiang, Shang-Da,Liu, Shan-Shan,Zhou, Li-Nan,Wang, Bing-Wu,Wang, Zhe-Ming,&Gao, Song.(2012).Series of Lanthanide Organometallic Single-Ion Magnets.INORGANIC CHEMISTRY,51(5),3079-3087.
MLA	Jiang, Shang-Da,et al."Series of Lanthanide Organometallic Single-Ion Magnets".INORGANIC CHEMISTRY 51.5(2012):3079-3087.