A Family of 3d-4f Octa-Nuclear [Mn(4)(III)Ln(4)(III)] Wheels (Ln = Sm, Gd, Tb, Dy, Ho, Er, and Y): Synthesis, Structure, and Magnetism

doi:10.1021/ic101754g

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	A Family of 3d-4f Octa-Nuclear [Mn(4)(III)Ln(4)(III)] Wheels (Ln = Sm, Gd, Tb, Dy, Ho, Er, and Y): Synthesis, Structure, and Magnetism
	Li, Mengyuan 1,2; Lan, Yanhua 1; Ako, Ayuk M.1,3; Wernsdorfer, Wolfgang 4; Anson, Christopher E.1; Buth, Gernot 5; Powell, Annie K.1,3; Wang, Zheming 2; Gao, Song 2
刊名	INORGANIC CHEMISTRY
	2010-12-20
卷号	49 期号:24 页码:11587-11594
ISSN号	0020-1669
DOI	10.1021/ic101754g
英文摘要	We present the syntheses, crystal structures, and magnetochemical characterizations for a family of isostructural [Mn(4)Ln(4)] compounds (Ln = Sm, Gd, Tb, Dy, Ho, Er, and Y). They were prepared from the reactions of formic acid, propionic acid, N-n-butyl-diethanolamine, manganese perchlorate, and lanthanide nitrates under the addition of triethylamine in MeOH. The compounds possess an intriguing hetero-octanuclear wheel structure with bur Mn-III and four Ln(III) ions alternatively arranged in a saddle-like ring, where formate ions act as key carboxylate bridges. In the lattice, the molecules stack into columns in a quasi-hexagonal arrangement, Direct current (dc) magnetic susceptibility measurements indicated the depopulation of the Stark components at low temperature and/or very weak antiferromagnetic interactions between magnetic centers. The zero-field alternating current (ac) susceptibility studies revealed that the compounds containing Sm, Tb, and Dy showed frequency-dependent out-of-phase signals, indicating they are single-molecule magnets (SMMs). Magnetization versus applied dc field sweeps on a single crystal of the Dy compound down to 40 mK exhibited hysteresis depending on temperatures and field sweeping rates, further confirming that the Dy compound is a SMM. The magnetization dynamics of the Sm and Y compounds investigated under dc fields revealed that the relaxation of the Sm compound is considered to be dominated by the two-phonon (Orbach) process while the Y compound displays a multiple relaxation process.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000285266800037
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/70397]
专题	中国科学院化学研究所
通讯作者	Powell, Annie K.
作者单位	1.Univ Karlsruhe, Inst Anorgan Chem, Karlsruhe Inst Technol, D-76131 Karlsruhe, Germany 2.Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China 3.Forschungszentrum Karlsruhe, Inst Nanotechnol, Karlsruhe Inst Technol, D-76021 Karlsruhe, Germany 4.Inst Neel CNRS, F-38042 Grenoble, France 5.Karlsruhe Inst Technol, ISS, FZK, D-76021 Karlsruhe, Germany
推荐引用方式 GB/T 7714	Li, Mengyuan,Lan, Yanhua,Ako, Ayuk M.,et al. A Family of 3d-4f Octa-Nuclear [Mn(4)(III)Ln(4)(III)] Wheels (Ln = Sm, Gd, Tb, Dy, Ho, Er, and Y): Synthesis, Structure, and Magnetism[J]. INORGANIC CHEMISTRY,2010,49(24):11587-11594.
APA	Li, Mengyuan.,Lan, Yanhua.,Ako, Ayuk M..,Wernsdorfer, Wolfgang.,Anson, Christopher E..,...&Gao, Song.(2010).A Family of 3d-4f Octa-Nuclear [Mn(4)(III)Ln(4)(III)] Wheels (Ln = Sm, Gd, Tb, Dy, Ho, Er, and Y): Synthesis, Structure, and Magnetism.INORGANIC CHEMISTRY,49(24),11587-11594.
MLA	Li, Mengyuan,et al."A Family of 3d-4f Octa-Nuclear [Mn(4)(III)Ln(4)(III)] Wheels (Ln = Sm, Gd, Tb, Dy, Ho, Er, and Y): Synthesis, Structure, and Magnetism".INORGANIC CHEMISTRY 49.24(2010):11587-11594.