Polyoxometalate-Assisted Assembly of Pearl-Chain-Like Cyanide-Bridged Single-Chain Magnets

Chen, Zi-Yi; Cheng, Yue; Liu, Qi; Deng, Yi-Fei; Zhang, Yuan-Zhu

2021-12-01

10.1021/acs.inorgchem.1c02922

INORGANIC CHEMISTRY   影响因子和分区

0020-1669

1520-510X

The introduction of K eggin-type POMs of [PMo12O40](3-) or [SiW12O40](4-) as counteranions into the Fe-III-M-II cyanometalate system afforded three chain complexes: [(Tp*)Fe(CN)(3)Ni(DMF)(4)](2){[(Tp*)Fe(CN)(3)Ni-(DMF)(3)(H2O)](2)Ni(DMF)(4)}[PMo12O40](2)center dot 14DMF (1, Tp*= hydridotris(3,5-dimethyl-pyrazol-1-yl)borate) and {[(Tp*)Fe(CN)(3)M(DMF)(3)(H2O)](2)M(DMF)(4)}[SiW12O40]center dot 3DMF (2, M = Ni-II; 3, M = Co-II). Complex 1 contains both discrete cationic [Fe2Ni2](2+) squares and less-studied {Fe2Ni3}(n) pearl chains, namely 3,2-chains, while 2 and 3 consist of pure 3,2-chains due to the replacement of [PMo12O40](3-) with [SiW12O40](4-) bearing one more negative charge. Magnetic studies revealed that all of the complexes exhibit single-chain-magnet (SCM) behaviors with the effective thermal barriers of Delta(tau 1)/k(B) = 61.6 K (infinite regime) and Delta(tau 2)/k(B) = 36.5 K (finite regime) for 1, Delta(tau)/k(B) = 46.9 K for 2 (finite), and Delta(tau)/k(B) = 30.6 K for 3 (finite). The POM moieties may play a pivotal role for the realization of this promising archetype of favoring SCM property: (1) the highly negatively charged POMs may facilitate the formation of the uncommon highly positive "pearl chain"; (2) the nanosized POMs necessarily led to the good isolation of the chains in the title complexes, and (3) the employment of POMs with different charges may regulate the resultant complexes in both structure and magnetism.

SCI ; EI

英语

NI期刊

第一 ; 通讯

Stable Support Plan Program of the Shenzhen Natural Science Fund[20200925151834005] ; National Natural Science Foundation of China[21671095,21901101]

Chemistry

Chemistry, Inorganic & Nuclear

WOS:000738004000001

AMER CHEMICAL SOC

20220211454159

Gems ; Magnetism ; Silicon

Gems:482.2.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Magnetism: Basic Concepts and Phenomena:701.2

CHEMISTRY

Web of Science

Southern Univ Sci & Technol SUSTech, Dept Chem, Shenzhen 518055, Peoples R China

Chen, Zi-Yi,Cheng, Yue,Liu, Qi,et al. Polyoxometalate-Assisted Assembly of Pearl-Chain-Like Cyanide-Bridged Single-Chain Magnets[J]. INORGANIC CHEMISTRY,2021,61(2):931-938.

Chen, Zi-Yi,Cheng, Yue,Liu, Qi,Deng, Yi-Fei,&Zhang, Yuan-Zhu.(2021).Polyoxometalate-Assisted Assembly of Pearl-Chain-Like Cyanide-Bridged Single-Chain Magnets.INORGANIC CHEMISTRY,61(2),931-938.

Chen, Zi-Yi,et al."Polyoxometalate-Assisted Assembly of Pearl-Chain-Like Cyanide-Bridged Single-Chain Magnets".INORGANIC CHEMISTRY 61.2(2021):931-938.