Modulating Magnetic Dynamics of Dy2 System through the Coordination Geometry and Magnetic Interaction

被引：112
作者：
Zhang, Peng [1 ,2 ]
Zhang, Li [1 ,3 ]
Lin, Shuang-Yan [1 ,2 ]
Xue, Shufang [1 ,2 ]
Tang, Jinkui [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
[3] Inner Mongolia Univ, Coll Chem & Chem Engn, Hohhot 010021, Peoples R China
来源：
INORGANIC CHEMISTRY | 2013年 / 52卷 / 08期
基金：
中国国家自然科学基金;
关键词：
COMPLEXES; RELAXATION; TRANSITION; ANISOTROPY; BEHAVIOR;
D O I：
10.1021/ic400150f
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two new dinuclear dysprosium compounds, [Dy-2(HL1)(2)(PhCOO)(2)(CH3OH)(2)(CH3OH)(2)] (1) and [Dy-2(L-2)(2)(NO3)(2)center dot(CH3OH)(2)]center dot 2CH(3)OH center dot 4H(2)O (2), have been assembled through applying two ligands with different coordination pockets. The different features of ligands H3L1 and H2L2 result in the distinct coordination geometry of the metal ions in their respective structures. The Dy ions of complexes 1 and 2 were linked by the alkoxide- and hydrazone-O, and display the hula hoop-like and the broken hula hoop-like coordination geometry, respectively. Consequently, these two compounds show distinct magnetic properties. Complex 1 behaves as a single molecule magnet (SMM) with rather slow quantum tunneling rate (tau > 274 ms), while no SMM behavior was observed for complex 2. In addition, the comparison of the structural parameters among the similar Dy-2 SMMs with hula hoop-like geometry reveals the significant role played by coordination geometry and magnetic interaction in modulating the relaxation dynamics of SMMs.
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收藏
页码：4587 / 4592
页数：6
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