Slow relaxation of the magnetization in high-nuclearity Ln-complexes

被引:40
作者
Gu, Xiaojun [2 ]
Clerac, Rodolphe [1 ]
Houri, Ahmad [1 ]
Xue, Dongfeng [2 ]
机构
[1] Univ Bordeaux 1, CNRS, Ctr Rech Paul Pascal, UPR8641, F-33600 Pessac, France
[2] Dalian Univ Technol, State Key Lab Fine Chem, Dept Mat Sci & Chem Engn, Dalian 116012, Peoples R China
基金
中国国家自然科学基金;
关键词
surface modification; lanthanide; cluster; slow relaxation; magnetization;
D O I
10.1016/j.ica.2008.02.051
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
By the surface modi. cation strategy, a novel high-nuclearity lanthanide complex with a discrete structure, Er26I(mu(3)-OH)(20)(mu(3)-O)(6)(NO3)(9)(IN)(33)(OH)(3)(H2O)(33) (noted Er-26, HIN = isonicotinic acid), has been prepared under hydrothermal conditions. The magnetic properties of Er26 and two analogue dysprosium assemblies Dy30I(mu(3)-OH)(24)(mu(3)-O)(6)(NO3)(9)(IN)(41)(OH)(3)(H2O)(38) (noted Dy-26-I) and Dy26I(mu(3)-OH)(20)(mu(3)-O) (6)(NO3)(9)(IN)(31.25)(OH)(4.75)(H2O)(41.75) (noted Dy-26-II) have been studied. The results show that the slow relaxation of the magnetization is newly found in Dy-26-I constructed from {Dy-26} and {Dy-4} cluster units. The {Dy-4} units in Dy-26-I, the relative orientation of the complex or the inter-molecular interactions between {Dy26} cores might play an important role in the origin of this magnetic behavior. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:3873 / 3876
页数:4
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