Assembling Dysprosium Dimer Units into a Novel Chain Featuring Slow Magnetic Relaxation via Formate Linker

被引：49

作者：

Chen, Qi ^{[1
,2
]}

Ma, Fang ^{[1
,2
]}

Meng, Yin-Shan ^{[4
]}

Sun, Hao-Ling ^{[1
,2
]}

Zhang, Yi-Quan ^{[3
]}

Gao, Song ^{[4
]}

机构：

[1] Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China

[2] Beijing Normal Univ, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China

[3] Nanjing Normal Univ, Sch Phys Sci & Technol, Jiangsu Key Lab NSLSCS, Nanjing 210023, Jiangsu, Peoples R China

[4] Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

来源：

INORGANIC CHEMISTRY | 2016年 / 55卷 / 24期

基金：

中国国家自然科学基金;

关键词：

SINGLE-MOLECULE MAGNETS; ION MAGNET; ANISOTROPY BARRIER; TB-III; COMPLEXES; DINUCLEAR; DYNAMICS; TETRANUCLEAR; SYMMETRY; BEHAVIOR;

D O I：

10.1021/acs.inorgchem.6b02276

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A dinuclear complex [DyLClCH3OH)](2) (1) and a one-dimensional compound [DyL(HCOO)(CH3OH)](n) (2) have been synthesized using an organic ligand of N'-(2-hydroxybenzylidene)picolinohydrazide (H2L). Complex 1 exhibits a symmetric dinuclear structure, in which the Dy3+ centers reside in a pentagonal-bipyramidal coordination environment. In 2, the dinuclear units of 1 are strung into chains by formate anions, in which Dy3+ ions are situated in an octa-coordinated, hula-hoop-like coordination geometry. Magnetic studies reveal that ferromagnetic coupling is found between Dy3+ ions in both compounds. Complexes 1 and 2 exhibit slow magnetic relaxation under zero dc field with effective energy barriers of 88.4 and 175.8 K, respectively. Magnetic study combined with ab initio calculations indicates that the better performance of 2 is related to the unique molecular geometry and relatively stronger Dy3+Dy3+ magnetic interaction within and/or between the dimer units.

引用

页码：12904 / 12911

页数：8

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