Slow magnetic relaxation and spin crossover behavior in two mixed-valence Co(ii)/Co(iii) complexes

被引：5

作者：

Huang, You-Lin ^{[1
]}

Zhong, Yun-Jing ^{[1
]}

Ye, Hua-Jian ^{[1
]}

Li, You-Hong ^{[1
]}

Kuang, Xiao-Man ^{[1
]}

Ouyang, Zhi-Jian ^{[1
]}

Chen, Wen-Bin ^{[1
]}

Yang, Meng ^{[1
]}

Dong, Wen ^{[1
]}

机构：

[1] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou Key Lab Environmentally Funct Mat & Tec, Guangzhou 510006, Peoples R China

来源：

NEW JOURNAL OF CHEMISTRY | 2022年 / 46卷 / 37期

基金：

中国国家自然科学基金;

关键词：

SINGLE-MOLECULE MAGNET; COBALT(II) COMPLEX; CRYSTAL-STRUCTURE; EASY-PLANE; ION; ANISOTROPY; TRANSITION; CHAIN;

D O I：

10.1039/d2nj03051a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two mixed-valence Co(II)/Co(III) complexes of [Co-II(phen)(3)][Co-III(HATD)(2)](2).3DMA.3.5H(2)O (1), and [CoII(terpy)(2)][Co-III(HATD)(2)](2).4DMA.H2O (2), (phen = 1,10-phenanthroline, terpy = 2,2':6',2"-terpyridine, H(3)ATD = azotetrazolyl-2,7-dihydroxynaphthalene, DMA = N,N-dimethylacetamide) were synthesized and their crystal structures were characterized. Crystal structure analyses reveal that complexes 1 and 2 consist of CoIII and CoII ions in an octahedral environment where the CoII ion is coordinated by three phen ligands and two terpy ligands, respectively. Magnetic measurements show that complex 1 displays field induced single-molecule magnet behavior, whereas 2 undergoes a gradual thermal spin crossover (SCO).

引用

页码：17720 / 17725

页数：6

共 60 条

[1] Synthesis, Characterization, and DFT Analysis of Bis-Terpyridyl-Based Molecular Cobalt Complexes [J].

Aroua, Safwan ;

Todorova, Tanya K. ;

Hommes, Paul ;

Charnoreau, Lise-Marie ;

Reissig, Hans-Ulrich ;

Mougel, Victor ;

Fontecave, Marc .

INORGANIC CHEMISTRY, 2017, 56 (10) :5930-5940

[2] Heat capacity calorimetry of a molecule-based magnetic material N(n-C4H9)4[CoIIFeIII(ox)3] [J].

Bhattacharjee, A ;

Sorai, M .

JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 326 (1-2) :251-254

[3] A systematic study of the influence of ligand field on the slow magnetic dynamics of Co(II)-diimine compounds [J].

Bhowmick, Indrani ;

Newell, Brian S. ;

Shores, Matthew P. .

DALTON TRANSACTIONS, 2021, 50 (31) :10737-10748

[4] Single molecule magnet behaviour in a square planarS=1/2 Co(ii) complex and spin-state assignment of multiple relaxation modes [J].

Bhowmick, Indrani ;

Shaffer, David W. ;

Yang, Jenny Y. ;

Shores, Matthew P. .

CHEMICAL COMMUNICATIONS, 2020, 56 (49) :6711-6714

[5] Slow Relaxation of the Magnetization on Frustrated Triangular FeIII Units with S=1/2 Ground State: The Effect of the Highly Ordered Crystal Lattice and the Counteranionsdel [J].

Canon-Mancisidor, Walter ;

Hermosilla-Ibanez, Patricio ;

Spodine, Evgenia ;

Paredes-Garcia, Veronica ;

Gomez-Garcia, Carlos J. ;

Minguez Espallargas, Guillermo ;

Venegas-Yazigi, Diego .

CRYSTAL GROWTH & DESIGN, 2021, 21 (11) :6213-6222

[6] The rationalized pathway from field-induced slow magnetic relaxation in CoII-WIV chains to single-chain magnetism in isotopological CoII-WV analogues [J].

Charytanowicz, Tomasz ;

Jankowski, Robert ;

Zychowicz, Mikolaj ;

Chorazy, Szymon ;

Sieklucka, Barbara .

INORGANIC CHEMISTRY FRONTIERS, 2022, 9 (06) :1152-1170

[7] Syntheses, supramolecular structures, magnetic and photochromic properties of six lanthanide complexes based on the 5-azotetrazolyl salicylic acid ligand [J].

Chen, Wen-Bin ;

Li, Zhi-Xin ;

Ouyang, Zhi-Jian ;

Lin, Wen-Ning ;

Yang, Liu ;

Dong, Wen .

RSC ADVANCES, 2014, 4 (105) :61104-61113

[8] Molecule-Based Magnetic Materials [J].

Coronado, E ;

Palacio, F ;

Veciana, J .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (23) :2570-2572

[9] Magnetic Anisotropy from Easy-Plane to Easy-Axial in Square Pyramidal Cobalt(II) Single-Ion Magnets [J].

Cui, Hui-Hui ;

Xu, Hongjuan ;

Zhang, Mingxing ;

Luo, Shuchang ;

Tong, Wei ;

Wang, Miao ;

Sun, Tongming ;

Chen, Lei ;

Tang, Yanfeng .

CRYSTAL GROWTH & DESIGN, 2022, 22 (04) :2742-2748

[10] On Approaching the Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal Dysprosium(III) Single-Molecule Magnet [J].

Ding, You-Song ;

Chilton, Nicholas F. ;

Winpenny, Richard E. P. ;

Zheng, Yan-Zhen .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2016, 55 (52) :16071-16074

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