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Issue 10, 2018
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Magnetic properties and structure of tetranuclear lanthanide complexes based on 8-hydroxylquinoline Schiff base derivative and β-diketone coligand

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Abstract

Five tetranuclear lanthanide complexes [Gd4(dbm)4(L)63-OH)2]·5CH3CN (1), [Tb4(dbm)4(L)63-OH)2]·2CH3CH2OH·4CH3CN (2), [Dy4(dbm)4(L)63-OH)2]·4CH3CN·2H2O (3), [Ho4(dbm)4(L)63-OH)2]·CH3CH2OH·4CH3CN·2H2O (4) and [Er4(dbm)4(L)63-OH)2] (5) are obtained from the reaction of 5-(4-pyridinecarboxaldehyde)amino-8-hydroxylquinoline (HL) and Ln(dbm)3·2H2O (dbm = 1,3-diphenyl-1,3-propanedione). Complexes 1–5 are isomorphous and crystallize in the monoclinic space group P21/c. The metal ions in 1–5 adopt an approximately square-antiprismatic coordination environment. Magnetic studies indicate that complex 1 features a magnetocaloric effect (MCE) with the magnetic entropy change of −ΔSm(T) = 16.35 J kg−1 K−1 at 3 K for ΔH = 7 T. Additionally, complex 3 displays single molecule magnet (SMM) behavior, exhibiting an effective energy barrier of the relaxation of magnetization Ueff/kB = 89.38 K and pre-exponential factor τ0 = 3.32 × 10−8 s.

Graphical abstract: Magnetic properties and structure of tetranuclear lanthanide complexes based on 8-hydroxylquinoline Schiff base derivative and β-diketone coligand

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Publication details

The article was received on 07 Jan 2018, accepted on 30 Jan 2018 and first published on 30 Jan 2018


Article type: Paper
DOI: 10.1039/C8DT00063H
Citation: Dalton Trans., 2018,47, 3503-3511
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    Magnetic properties and structure of tetranuclear lanthanide complexes based on 8-hydroxylquinoline Schiff base derivative and β-diketone coligand

    H. Gao, S. Huang, X. Zhou, Z. Liu and J. Cui, Dalton Trans., 2018, 47, 3503
    DOI: 10.1039/C8DT00063H

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