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Tuning the Magnetization Dynamics of TbIII-Based Single-Chain Magnets Through Substitution on the Nitronyl Nitroxide Radical

Abstract

Two one-dimensional nitronyl nitroxide radical (NITR)-bridged lanthanide chain compounds, namely, [Tb(hfac)3(NIT-4-ThienPh)]n (1) and [Tb(hfac)3(NIT-5-ThienPh)]n (2), where hfac = hexafluoroacetylacetonate, NIT-4-ThienPh = 2-(4′-phenyl-2′-thienyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide, and NIT-5-ThienPh = 2-(5′-phenyl-2′-thienyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide, were obtained with different NITRs. Alternating-current magnetic susceptibility studies show that both of the compounds are single-chain magnets, while a minor change of the site of phenyl substituent on the NITR significantly influences the magnetization dynamics. The effective magnetization reversal barrier of 1 (53 cm−1) is more than two times higher than that of 2 (20 cm−1) and the coercive field of 1 is also much higher than that of 2 because of minor changes of the local coordination symmetry of the TbIII centers and magnetic interactions between the spin carriers along the chain induced by substitution on the radical ligand.

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Publication details

The article was received on 23 Apr 2019, accepted on 15 May 2019 and first published on 16 May 2019


Article type: Paper
DOI: 10.1039/C9DT01704F
Dalton Trans., 2019, Accepted Manuscript

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    Tuning the Magnetization Dynamics of TbIII-Based Single-Chain Magnets Through Substitution on the Nitronyl Nitroxide Radical

    X. Liu, Y. Wang, Z. Han, T. Han, W. Shi and C. Peng, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT01704F

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