The Nature of the Bridging Anion Controls the Single-Molecule Magnetic Properties of DyX4M 12-Metallacrown-4 Complexes

被引：48

作者：

Boron, Thaddeus T., III ^{[1
]}

Lutter, Jacob C. ^{[2
,3
]}

Daly, Connor I. ^{[2
]}

Chow, Chun Y. ^{[3
]}

Davis, Andrew H. ^{[1
]}

Ninithong-Roldan, Arunpatcha ^{[4
,6
]}

Zeller, Matthias ^{[4
,5
]}

Kampf, Jeff W. ^{[3
]}

Zaleski, Curtis M. ^{[2
]}

Pecoraro, Vincent L. ^{[3
]}

机构：

[1] Slippery Rock Univ, Dept Chem, Slippery Rock, PA 16057 USA

[2] Shippensburg Univ, Dept Chem, Shippensburg, PA 17257 USA

[3] Univ Michigan, Dept Chem, Ann Arbor, MI 48108 USA

[4] Youngstown State Univ, Dept Chem, Youngstown, OH 44555 USA

[5] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

[6] Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA

来源：

INORGANIC CHEMISTRY | 2016年 / 55卷 / 20期

基金：

美国国家科学基金会;

关键词：

LANTHANIDE COMPLEXES; METALLACROWNS; RELAXATION; 15-METALLACROWN-5; ANISOTROPY; DISTANCES; BEHAVIOR; DESIGN; FAMILY; STATE;

D O I：

10.1021/acs.inorgchem.6b01832

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A family of DyX4M(12-MCMnIII(N)shi(-4)) compounds were synthesized and magnetically characterized (X = salicylate, acetate, benzoate, trimethylacetate, M = Na-I or K-I). The bridging ligands were systematically varied while keeping the remainder of the MC-geometry constant. The type of monovalent cation, necessary for charge balance, was also altered. The dc magnetization and susceptibility of all compounds were similar across the series. Regardless of the identity of the countercation, the Dy(Hsal)(4)M 12-MC-4 compounds were the only compounds to show frequency-dependent ac magnetic susceptibility, a hallmark of single-molecule magnetism. This indicates that the nature of the bridging ligand in the 12-MCMnIII(N)shi-4 compounds strongly affects the out-of-phase magnetic properties. The SMM behavior appears to correlate with the pK(a) of the bridging ligand.

引用

页码：10597 / 10607

页数：11

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