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Issue 14, 2018
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Four tetra-nuclear lanthanide complexes based on 8-hydroxyquinolin derivatives: magnetic refrigeration and single-molecule magnet behaviour

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Abstract

Four tetra-nuclear lanthanide complexes: {[Ln4(L)6(tmhd)43-OH)2mH2O} (Ln = Gd (1, m = 0), Tb (2, m = 3), Dy (3, m = 0), Ho (4, m = 0); L = 5-((pyridin-4-ylmethylene)amino)quinolin-8-ol, tmhd = 2,2,6,6-tetramethylheptane-3,5-dione) were fabricated and structurally characterized. Compounds 1–4 are isostructural and belong to the monoclinic system with space group P21/n. The cores of the complexes contain a tetranuclear arrangement of LnIII ions, which is bridged by the two pyramidal μ3-OH ions, and the four LnIII ions are precisely coplanar. The magnetic study reveals that 1 exhibits cryogenic magnetic refrigeration property (−ΔSm = 20.85 J K−1 kg−1), whereas compound 3 exhibits slow relaxation of the magnetization.

Graphical abstract: Four tetra-nuclear lanthanide complexes based on 8-hydroxyquinolin derivatives: magnetic refrigeration and single-molecule magnet behaviour

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Publication details

The article was received on 03 May 2018, accepted on 04 Jun 2018 and first published on 08 Jun 2018


Article type: Paper
DOI: 10.1039/C8NJ02161A
Citation: New J. Chem., 2018,42, 11847-11853
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    Four tetra-nuclear lanthanide complexes based on 8-hydroxyquinolin derivatives: magnetic refrigeration and single-molecule magnet behaviour

    M. Fang, L. Shao, T. Shi, Y. Chen, H. Yu, P. Li, W. Wang and B. Zhao, New J. Chem., 2018, 42, 11847
    DOI: 10.1039/C8NJ02161A

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