Influence of Guest Exchange on the Magnetization Dynamics of Dilanthanide Single-Molecule-Magnet Nodes within a Metal-Organic Framework

被引：291

作者：

Zhang, Xuejing ^{[1
]}

Vieru, Veacheslav ^{[4
,5
]}

Feng, Xiaowen ^{[6
]}

Liu, Jun-Liang ^{[6
]}

Zhang, Zhenjie ^{[1
]}

Na, Bo ^{[1
]}

Shi, Wei ^{[1
]}

Wang, Bing-Wu ^{[2
]}

Powell, Annie K. ^{[3
]}

Chibotaru, Liviu F. ^{[4
,5
]}

Gao, Song ^{[2
]}

Cheng, Peng ^{[1
]}

Long, Jeffrey R. ^{[6
]}

机构：

[1] Nankai Univ, Dept Chem, Key Lab Adv Energy Mat Chem MOE, State Key Lab Elementoorgan Chem,Collaborat Innov, Tianjin 300071, Peoples R China

[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] Karlsruhe Inst Technol, Inst Inorgan Chem, D-76131 Karlsruhe, Germany

[4] Katholieke Univ Leuven, Theory Nanomat Grp, B-3001 Heverlee, Belgium

[5] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, B-3001 Heverlee, Belgium

[6] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 34期

基金：

中国国家自然科学基金;

关键词：

ab initio calculations; host-guest systems; lanthanides; metal-organic frameworks; single-molecule magnets; COORDINATION POLYMERS; LANTHANIDE COMPLEXES; SLOW RELAXATION; BLOCKING; ANISOTROPY; HYSTERESIS; BEHAVIOR;

D O I：

10.1002/anie.201503636

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Multitopic organic linkers can provide a means to organize metal cluster nodes in a regular three-dimensional array. Herein, we show that isonicotinic acid N-oxide (HINO) serves as the linker in the formation of a metal-organic framework featuring Dy-2 single-molecule magnets as nodes. Importantly, guest solvent exchange induces a reversible single-crystal to single-crystal transformation between the phases Dy-2(INO)(4)(NO3)(2)center dot 2 solvent (solvent=DMF (Dy-2-DMF), CH3CN (Dy-2-CH3CN)), thereby switching the effective magnetic relaxation barrier (determined by ac magnetic susceptibility measurements) between a negligible value for Dy-2-DMF and 76 cm(-1) for Dy-2-CH3CN. Ab initio calculations indicate that this difference arises not from a significant change in the intrinsic relaxation barrier of the Dy-2 nodes, but rather from a slowing of the relaxation rate of incoherent quantum tunneling of the magnetization by two orders of magnitude.

引用

页码：9861 / 9865

页数：5

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