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Issue 33, 2019
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Ligand ratio/solvent-influenced syntheses, crystal structures, and magnetic properties of polydentate Schiff base ligand-Dy(iii) compounds with β-diketonate ligands as co-ligands

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Abstract

Tuning the synthesis conditions and further regulating the magnetic dynamics of single-molecule magnets (SMMs) are crucial challenges for chemists. Some feasible approaches have been developed to understand magneto-structural correlations and regulate relaxation behaviors via rational design. Based on the solvent-induced effect or ligand ratio regulation, three new dysprosium(III) coordination compounds, [Dy(L)(Dppd)]·solvent (1), [Dy(L)(Dppd)] (2) and [Dy(L)(Dppd)2]·solvent (3) (H2L = N,N′-bis(2-hydroxy-5-methyl-3-formylbenzyl)-N,N′-bis-(pyridin-2-ylmethyl)ethylenediamine, Dppd = dibenzoylmethane) have been successfully prepared. Compounds 1 and 2 are mononuclear structures. 3 is a dinuclear core in which the metal centers are bridged by two phenol-O atoms of one L2− ligand. Dy(III) cations in compounds 1–3 present acta-coordination geometries. More interestingly, compounds 1 and 2 can be mutually transformed through the reversible single-crystal-to-single-crystal (SCSC) transformation under different solvent environments. The crystals of 1 and 2 underwent a dissolution–precipitation process and changed into 3, respectively. The distinct structures and magnetic properties were determined through combined structural, experimental and theoretical investigations.

Graphical abstract: Ligand ratio/solvent-influenced syntheses, crystal structures, and magnetic properties of polydentate Schiff base ligand-Dy(iii) compounds with β-diketonate ligands as co-ligands

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Publication details

The article was received on 21 Jun 2019, accepted on 22 Jul 2019 and first published on 22 Jul 2019


Article type: Paper
DOI: 10.1039/C9DT02618E
Dalton Trans., 2019,48, 12466-12481

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    Ligand ratio/solvent-influenced syntheses, crystal structures, and magnetic properties of polydentate Schiff base ligand-Dy(III) compounds with β-diketonate ligands as co-ligands

    S. Zhang, W. Mo, Z. Zhang, F. Gao, L. Wang, D. Hu and S. Chen, Dalton Trans., 2019, 48, 12466
    DOI: 10.1039/C9DT02618E

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