3D Co(II, III) mixed-valence metal-organic framework affording field-induced slow magnetic relaxation

被引：8

作者：

Zhang, Sheng ^{[1
]}

Liu, Xiangyu ^{[1
,2
]}

Liu, Bin ^{[1
]}

Xia, Zhengqiang ^{[1
]}

Wang, Weitao ^{[3
]}

Yang, Qi ^{[1
]}

Ke, Hongshan ^{[1
]}

Wei, Qing ^{[1
]}

Xie, Gang ^{[1
]}

Chen, Sanping ^{[1
]}

Gao, Shengli ^{[1
]}

机构：

[1] NW Univ Xian, Key Lab Synthet & Nat Funct Mol Chem, Coll Chem & Mat Sci, Minist Educ, Xian 710069, Peoples R China

[2] Ningxia Univ, Sch Chem & Chem Engn, Yinchuan 750021, Peoples R China

[3] Shaanxi Univ Sci & Technol, Coll Chem & Chem Engn, Xian 710021, Peoples R China

来源：

SCIENCE CHINA-CHEMISTRY | 2015年 / 58卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Co(II; III); mixed-valence; metal-organic framework; slow magnetic relaxation; SINGLE-MOLECULE-MAGNET; CRYSTAL-STRUCTURES; COORDINATION POLYMER; COBALT(II) COMPLEXES; AZOLATE FRAMEWORKS; BUILDING-BLOCKS; CU-II; LIGAND; CLUSTER; ENERGY;

D O I：

10.1007/s11426-015-5318-9

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A 3D mixed-valence Co(III)-Co(II) compound [Co-9(bta)(10)(Hbta)(2)(H2O)(10)] (n) center dot[22(H2O)] (n) (1) (H(2)bta=N,N-bis(1H-tetrazole-5-yl)-amine) was hydrothermally synthesized by reaction of Co(NO3)(2)center dot 6H(2)O with H(2)bta center dot H2O. Compound 1 consists of three kinds of distorted-octahedral [Co-II(N4O2)] paramagnetic nodes which are separated by [Co-III(bta)(2)(Hbta)](2-)/[Co-III(bta)(3)](3-) diamagnetic linkers to generate a 3D porous metal-organic framework (MOF) with alternative a <-Co(III)a <-Co(II)a <- array and channels incorporating water molecules. Under an applied magnetic field of 4000 Oe, compound 1 exhibits slow relaxation of magnetization at low temperatures, giving Delta E/k (B) =30.00 K and tau(0) =2.0x10(-8) s.

引用

页码：1032 / 1038

页数：7

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