Slow magnetic relaxation in five-coordinate spin-crossover cobalt(II) complexes

被引：52

作者：

Cui, Hui-Hui ^{[1
]}

Wang, Jing ^{[1
]}

Chen, Xue-Tai ^{[1
]}

Xue, Zi-Ling ^{[2
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing 210023, Jiangsu, Peoples R China

[2] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

来源：

CHEMICAL COMMUNICATIONS | 2017年 / 53卷 / 67期

基金：

美国国家科学基金会;

关键词：

SINGLE-MOLECULE MAGNET; ION MAGNET; BEHAVIOR; IRON(II); STATE; 4-COORDINATE; ANISOTROPY; BLOCKING; SYSTEMS; FE(II);

D O I：

10.1039/c7cc04785a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present the first examples of the coexistence of field induced slow magnetic relaxation and spin-crossover observed in five-coordinate cobalt(II) complexes [Co(12-TMC)(CH3CN)](X)(2) (12-TMC = 1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecane, X = BF4-, 1; PF6-, 2). The direct-current (dc) magnetic data show a gradual and incomplete spin-crossover at high temperature. 1 and 2 display frequency-and temperature-dependent alternating-current (ac) magnetic susceptibility under an applied dc field of 2500 Oe, which originates from the S = 1/2 spin state of Co(II) ions.

引用

页码：9304 / 9307

页数：4

共 46 条

[1] Shape maps and polyhedral interconversion paths in transition metal chemistry [J].

Alvarez, S ;

Alemany, P ;

Casanova, D ;

Cirera, J ;

Llunell, M ;

Avnir, D .

COORDINATION CHEMISTRY REVIEWS, 2005, 249 (17-18) :1693-1708

[2] Continuous symmetry measures of penta-coordinate molecules: Berry and non-Berry distortions of the trigonal bipyramid [J].

Alvarez, S ;

Llunell, M .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 2000, (19) :3288-3303

[3] Reduced anionic Mn12 molecules with half-integer ground states as single-molecule magnets [J].

Aubin, SMJ ;

Sun, ZM ;

Pardi, L ;

Krzystek, J ;

Folting, K ;

Brunel, LC ;

Rheingold, AL ;

Christou, G ;

Hendrickson, DN .

INORGANIC CHEMISTRY, 1999, 38 (23) :5329-5340

[4] Magnetic anisotropy in two- to eight-coordinated transition-metal complexes: Recent developments in molecular magnetism [J].

Bar, Arun Kumar ;

Pichon, Celine ;

Sutter, Jean-Pascal .

COORDINATION CHEMISTRY REVIEWS, 2016, 308 :346-380

[5] Field Supported Slow Magnetic Relaxation in a Mononuclear Cu(II) Complex [J].

Boca, Roman ;

Rajnak, Cyril ;

Titis, Jan ;

Valigura, Dusan .

INORGANIC CHEMISTRY, 2017, 56 (03) :1478-1482

[6] Slow magnetic relaxation in mononuclear seven-coordinate cobalt(II) complexes with easy plane anisotropy [J].

Chen, Lei ;

Chen, Shu-Yang ;

Sun, Yi-Chen ;

Guo, Yu-Mei ;

Yu, Lu ;

Chen, Xue-Tai ;

Wang, Zhenxing ;

Ouyang, Z. W. ;

Song, You ;

Xue, Zi-Ling .

DALTON TRANSACTIONS, 2015, 44 (25) :11482-11490

[7] Slow Magnetic Relaxation in a Mononuclear Eight-Coordinate Cobalt(II) Complex [J].

Chen, Lei ;

Wang, Jing ;

Wei, Jin-Mei ;

Wernsdorfer, Wolfgang ;

Chen, Xue-Tai ;

Zhang, Yi-Quan ;

Song, You ;

Xue, Zi-Ling .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2014, 136 (35) :12213-12216

[8] PHI: A powerful new program for the analysis of anisotropic monomeric and exchange-coupled polynuclear d- and f-block complexes [J].

Chilton, Nicholas F. ;

Anderson, Russell P. ;

Turner, Lincoln D. ;

Soncini, Alessandro ;

Murray, Keith S. .

JOURNAL OF COMPUTATIONAL CHEMISTRY, 2013, 34 (13) :1164-1175

[9] Dispersion and absorption in dielectrics I. Alternating current characteristics [J].

Cole, KS ;

Cole, RH .

JOURNAL OF CHEMICAL PHYSICS, 1941, 9 (04) :341-351

[10] Magnetic blocking in extended metal atom chains: a pentachromium(II) complex behaving as a single-molecule magnet [J].

Cornia, A. ;

Rigamonti, L. ;

Boccedi, S. ;

Clerac, R. ;

Rouzieres, M. ;

Sorace, L. .

CHEMICAL COMMUNICATIONS, 2014, 50 (96) :15191-15194

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