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Journal Articles Dalton Transactions Year : 2021

A metal-radical hetero-tri-spin SCM with methyl–pyrazole–nitronyl nitroxide bridges

Abstract

The preparation, crystal structures, and magnetic properties of a family of hetero-tri-spin 1-D coordination polymers with the formula [Ln(hfac)3Cu(hfac)2(4-NIT-MePyz)2] (Ln = Gd, 1, Tb, 2, Dy, 3; hfac = hexafluoroacetylacetonate; 4-NIT-MePyz = 2-{4-(1-methyl)-pyrazolyl}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) are reported. In these complexes, the 4-NIT-MePyz radical acts as a linker to bridge the CuII and LnIII ions through its pyrazole and aminoxyl groups to form a chain structure. Magnetic properties typical of spin-chains are observed for Dy and Tb derivatives but single-chain magnet (SCM) behavior was evidenced only for the Tb compound which is characterized by an energy gap for demagnetization Δτ/kB of 31 K.
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Dates and versions

hal-03361525 , version 1 (01-10-2021)

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Xiaohui Huang, Kang Wang, Jing Han, Junfang Xie, Licun Li, et al.. A metal-radical hetero-tri-spin SCM with methyl–pyrazole–nitronyl nitroxide bridges. Dalton Transactions, 2021, 50 (34), pp.11992-11998. ⟨10.1039/D1DT02006D⟩. ⟨hal-03361525⟩
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