Cyanide-Bridged Rope-like Chains Based on Trigonal-Bipyramidal [Fe2Cu3] Subunits

Jiong Yang; Mao-Lin You; Shihao Liu; Yi-Fei Deng; Xiao-Yong Chang; Stephen M Holmes; Yuan-Zhu Zhang

doi:10.1021/acs.inorgchem.3c02986

Cyanide-Bridged Rope-like Chains Based on Trigonal-Bipyramidal [Fe₂Cu₃] Subunits

Inorg Chem. 2023 Oct 23;62(42):17530-17536. doi: 10.1021/acs.inorgchem.3c02986. Epub 2023 Oct 6.

Authors

Jiong Yang¹, Mao-Lin You¹, Shihao Liu¹, Yi-Fei Deng¹, Xiao-Yong Chang¹, Stephen M Holmes², Yuan-Zhu Zhang¹

Affiliations

¹ Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China.
² Department of Chemistry and Biochemistry and Centre for Nanoscience, University of Missouri-St. Louis, St. Louis, Missouri 63121, United States.

PMID: 37801447
DOI: 10.1021/acs.inorgchem.3c02986

Abstract

Extending a selected cyanometalate block into a higher dimensional framework continues to present intriguing challenges in the fields of chemistry and material science. Here, we prepared two rope-like chain compounds of {[(Tp*^Me)Fe(CN)₃]₂Cu₂X₂(L)}·sol (1, X = Cl, L = (MeCN)_0.5(H₂O/MeOH)_0.5, sol = 2MeCN·1.5H₂O; 2, X = Br, L = MeOH, sol = 2MeCN·0.75H₂O; Tp*^Me = tris(3, 4, 5-trimethylpyrazole)borate) in which the cyanide-bridged trigonal-bipyramidal [Fe₂Cu₃] subunits were linked with the adjacent ones via two vertex Cu(II) centers, providing a new cyanometallate chain archetype. Direct current magnetic study revealed the presence of ferromagnetic couplings between Fe(III) and Cu(II) ions and uniaxial anisotropy due to a favorable alignment of the anisotropic tricyanoiron(III) units. Moreover, compound 1 exhibits single-chain magnet behavior with an appreciable energy barrier of 72 K, while 2 behaves as a metamagnet, likely caused by the subtle changes in the interchain interactions.