title: Single-Molecule-Magnet Behavior in a [2 × 2] Grid Dy(III)4 Cluster and a Dysprosium-Doped Y(III)4 Cluster.
abstract: Thanks to the MeCN hydrolysis in situ reaction, a [2 × 2] square grid Dy(III)4 cluster based on a polypyridyl triazolate ligand, [Dy4(OH)2(bpt)4(NO3)4(OAc)2] (1), was separated successfully and characterized through single-crystal X-ray diffraction and SQUID magnetometry. The frequency-dependent signals in the out-of-phase component of the susceptibility associated with slow relaxation of the magnetization confirmed that complex 1 displays single-molecule magnet (SMM) behavior. Two distinct slow magnetic relaxation processes, with effective energy barriers Ueff1 = 93 cm(-1) for fast relaxation and Ueff2 = 143 cm(-1) for slow relaxation observed under a zero direct-current field, are mainly attributed to the origin of single-ion behavior, which can be further acknowledged by the magnetic investigation of a dysprosium-doped yttrium cluster. Besides, it should be noted that complex 1 represents so far the highest energy barrier among the pure Dy(III)4 SMMs.
authors.forename: Peng-Hu
authors.initials: PH
authors.lastname: Guo
authors.forename: Jiang
authors.initials: J
authors.lastname: Liu
authors.forename: Zi-Hao
authors.initials: ZH
authors.lastname: Wu
authors.forename: Hua
authors.initials: H
authors.lastname: Yan
authors.forename: Yan-Cong
authors.initials: YC
authors.lastname: Chen
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Jia
authors.forename: Ming-Liang
authors.initials: ML
authors.lastname: Tong
mesh_terms: D004419:Dysprosium / Q000737:chemistry*; D060328:Magnetic Phenomena; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D004419:Dysprosium