Enhancing Magnetic Behaviors of Dysprosium 'Single-Molecule Magnets from Crystal Field Perturbation by Deprotonating Schiff-Base Ligand

被引：17

作者：

Wang, Juan ^{[1
,2
]}

Wang, Haili ^{[1
,2
]}

Ma, Yue ^{[1
,2
]}

Tang, Jinkui ^{[3
]}

Li, Licun ^{[1
,2
]}

Wang, Qinglun ^{[1
,2
]}

Zhao, Bin ^{[1
,2
]}

Cheng, Peng ^{[1
,2
]}

Ma, Jiangong ^{[1
,2
]}

机构：

[1] Nankai Univ, Dept Chem, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China

[2] Nankai Univ, Tianjin Key Lab Met & Mol Based Mat Chem, Tianjin 300071, Peoples R China

[3] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Jilin, Peoples R China

来源：

CRYSTAL GROWTH & DESIGN | 2019年 / 19卷 / 06期

基金：

中国国家自然科学基金;

关键词：

ENERGY BARRIER; ION LN; RELAXATION; ANISOTROPY; DY(III); LANTHANIDES; COMPLEXES; DYNAMICS; OXALATE; LN(III);

D O I：

10.1021/acs.cgd.9b00261

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

For studying how crystal field perturbation influence magnetic relaxation behaviors of Ln-SMMs, four complexes of [Ln(H2L)(NO3)(H2O)(EtOH)](NO3)(2)center dot H2O (Ln = Dy (1), Tb (2)) and [Ln(L)(NO3)(MeOH)(2)] (Ln = Dy (3), Tb (4)) were synthesized by utilizing planar pentadentated Schiff-base ligand H2L [2,6-diylbis(ethan-1-yl-1-ylidene)di(isonicotinohydrazide)] under different alkaline conditions. They all have similar mononuclear structures with Ln(III) ion in nine-coordinated muffin geometry. Crystal field was slightly perturbed by deprotonating H2L ligand and using different solvent molecules in Dy-III complex 3, which result in field-induced two-step relaxation processes with almost 3-fold increase in U-eff of 57.52 K (SR) and 28.49 K (FR) than 20.63 K for complex 1 showing one-step relaxation process. This work gives another example of improving SMM behavior simply by subtle crystal field perturbation.

引用

页码：3365 / 3371

页数：7

共 60 条

[1] Mononuclear Lanthanide Single Molecule Magnets Based on the Polyoxometalates [Ln(W5O18)2]9- and [Ln(β2-SiW11O39)2]13- (LnIII = Tb, Dy, Ho, Er, Tm, and Yb) [J].

AlDamen, Murad A. ;

Cardona-Serra, Salvador ;

Clemente-Juan, Juan M. ;

Coronado, Eugenio ;

Gaita-Arino, Alejandro ;

Marti-Gastaldo, Carlos ;

Luis, Fernando ;

Montero, Oscar .

INORGANIC CHEMISTRY, 2009, 48 (08) :3467-3479

[2]

[Anonymous], 2014, SHELXL

[3]

[Anonymous], 2014, SHELXL 2014 PROGRAM

[4] Design of magnetic coordination complexes for quantum computing [J].

Aromi, Guillem ;

Aguila, David ;

Gamez, Patrick ;

Luis, Fernando ;

Roubeau, Olivier .

CHEMICAL SOCIETY REVIEWS, 2012, 41 (02) :537-546

[5] Magnetism of lanthanides in molecular materials with transition-metal ions and organic radicals [J].

Benelli, C ;

Gatteschi, D .

CHEMICAL REVIEWS, 2002, 102 (06) :2369-2387

[6] Single Pyramid Magnets: Dy5 Pyramids with Slow Magnetic Relaxation to 40 K [J].

Blagg, Robin J. ;

Muryn, Christopher A. ;

McInnes, Eric J. L. ;

Tuna, Floriana ;

Winpenny, Richard E. P. .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2011, 50 (29) :6530-6533

[7]

Boudreaux E.A., 1976, Theory and Applications of Molecular Paramagnetism

[8] Lanthanide-containing molecular and supramolecular polymetallic functional assemblies [J].

Bünzli, JCG ;

Piguet, C .

CHEMICAL REVIEWS, 2002, 102 (06) :1897-1928

[9] Structural and Electronic Dependence of the Single-Molecule-Magnet Behavior of Dysprosium(III) Complexes [J].

Campbell, Victoria E. ;

Bolvin, Helene ;

Riviere, Eric ;

Guillot, Regis ;

Wernsdorfer, Wolfgang ;

Mallah, Talal .

INORGANIC CHEMISTRY, 2014, 53 (05) :2598-2605

[10] Rational enhancement of the energy barrier of bis(tetrapyrrole) dysprosium SMMs via replacing atom of porphyrin core [J].

Cao, Wei ;

Gao, Chen ;

Zhang, Yi-Quan ;

Qi, Dongdong ;

Liu, Tao ;

Wang, Kang ;

Duan, Chunying ;

Gao, Song ;

Jiang, Jianzhuang .

CHEMICAL SCIENCE, 2015, 6 (10) :5947-5954

← 1 2 3 4 5 6 →