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Evolution from linear tetranuclear cluster into one-dimensional chain of Dy(III) single-molecule magnets with enhanced energy barrier

Abstract

Reactions of DyCl3∙6H2O or Dy2O3 with 2-quinolinecarboxylic acid (H-QLC) yielded two compounds, namely, [Dy4(QLC)12(H2O)6]·4H2O (1) and [Dy(QLC)3(H2O)2]n (2). Compound 1 is a linear tetranuclear structure with one central [Dy2(QLC)4(H2O)4] subunit and two terminal [Dy(QLC)3(H2O)] subunits linked by bridging QLC– ligands. Compound 2 has a one-dimensional(1D) chain wherein the [Dy(QLC)2] unit formed by two QLC–ligands chelating a Dy(III) ion is connected by the bridging QLC–ligands. Compounds 1 and 2 exhibit slow magnetic relaxation behaviour in the absence of static magnetic field, which is rarely observed in lanthanide-carboxylate compounds. Structural evolution from linear Dy4 cluster of 1 into 1D chain of 2, the anisotropy energy barrier (Ueff) are enhanced from 45.4(2) to 144.2(1) K. Though the Dy(III) centers in 1 and 2 all are eight-coordinated with square antiprismatic coordination environments, the higher energy barrier observed for 2 could be the result of a more favorable crystal field for the Dy(III) ions in 2.

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Publication details

The article was received on 01 Apr 2017, accepted on 09 May 2017 and first published on 12 May 2017


Article type:
DOI: 10.1039/C7QI00178A
Citation: Inorg. Chem. Front., 2017, Accepted Manuscript
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    Evolution from linear tetranuclear cluster into one-dimensional chain of Dy(III) single-molecule magnets with enhanced energy barrier

    R. Li, Q. Liu, Y. Wang, C. Liu and S. Liu, Inorg. Chem. Front., 2017, Accepted Manuscript , DOI: 10.1039/C7QI00178A

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