Field-induced slow magnetic relaxation behaviours in binuclear cobalt(II) metallocycles and exchange-coupled clusters

Shao, Dong1,5; Moorthy, Shruti3; Zhou, Yue1; Wu, Si-Tong1; Zhu, Jing-Yan1; Yang, Jiong4; Wu, Dong-Qing2; Tian, Zhengfang1; Singh, Saurabh Kumar3

2022-05-01

10.1039/d2dt01620f

DALTON TRANSACTIONS   影响因子和分区

1477-9226

1477-9234

Precise control of the structures and magnetic properties of a molecular material constitutes an important challenge to realize tailor-made magnetic function. Herein, we report that the ligand-directed coordination self-assembly of a dianionic cobalt(II) mononuclear complex and selective organic linkers has led to two distinct dicobalt(II) complexes, [Co-2(pdms)(2)(bpym)(3)].2MeCN (1) and [Co(pdms)(bipm)](2).3DMF (2) (H(2)pdms = 1,2-bis(methanesulfonamide)benzene; bpym = 2,2'-bipyrimidine; bimp = 1,4-bis[(H-imidazol-1-yl)methyl]benzene). Structural analyses revealed that complexes 1 and 2 are discrete binuclear molecules containing two neutral {Co(pdms)} species bridged by bpym and bimp ligands, respectively, forming an exchange-coupled Co-2(II) dimer and a rare Co-2(II) metallocycle. Magnetic studies found that 1 exhibits considerable antiferromagnetic interactions transferred by the bpym bridge while negligible magnetic interactions in 2 due to the long bimp ligands. Interestingly, both the complexes show significant magnetic anisotropy and thus exhibit slow magnetic relaxation under an external dc field originating from spin-lattice relaxation. Detailed theoretical calculations were further applied to understand the magnetic interactions and magnetic anisotropy in 1 and 2. The foregoing results highlight that coordination solids with programmed structures and magnetic properties can be designed and prepared through a judicious selection of molecular complex building blocks and organic linkers.

SCI ; EI

英语

其他

Huanggang Normal University[2042021033] ; Open Foundation of State Key Laboratory of Coordination Chemistry[SKLCC2208] ; Department of Science and Technology[SRG/2020/001323] ; National Natural Science Foundation of China[21901152]

Chemistry

Chemistry, Inorganic & Nuclear

WOS:000807566200001

ROYAL SOC CHEMISTRY

20222512258133

Benzene ; Dimers ; Ligands ; Magnetic anisotropy ; Magnetism ; Microchannels

Magnetism: Basic Concepts and Phenomena:701.2 ; Physical Chemistry:801.4 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1 ; Physical Properties of Gases, Liquids and Solids:931.2

CHEMISTRY

Web of Science

1.Huanggang Normal Univ, Coll Chem & Chem Engn, Hubei Key Lab Proc & Applicat Catalyt Mat, Huanggang 438000, Peoples R China
2.Shangqiu Normal Univ, Engn Res Ctr Photoelect Funct Mat, Sch Chem & Chem Engn, Shangqiu 476000, Peoples R China
3.Indian Inst Technol Hyderabad, Dept Chem, Kandi 502285, Telangana, India
4.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
5.Nanjing Univ, State Key Lab Coordinat Chem, Nanjing 210023, Peoples R China

Shao, Dong,Moorthy, Shruti,Zhou, Yue,et al. Field-induced slow magnetic relaxation behaviours in binuclear cobalt(II) metallocycles and exchange-coupled clusters[J]. DALTON TRANSACTIONS,2022,51:9357-9368.

Shao, Dong.,Moorthy, Shruti.,Zhou, Yue.,Wu, Si-Tong.,Zhu, Jing-Yan.,...&Singh, Saurabh Kumar.(2022).Field-induced slow magnetic relaxation behaviours in binuclear cobalt(II) metallocycles and exchange-coupled clusters.DALTON TRANSACTIONS,51,9357-9368.

Shao, Dong,et al."Field-induced slow magnetic relaxation behaviours in binuclear cobalt(II) metallocycles and exchange-coupled clusters".DALTON TRANSACTIONS 51(2022):9357-9368.