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Crystallization and Single Molecule Magnetic Behavior of Quadruple-stranded Helicate: Tuning the Anisotropic Axes

Abstract

It has proven successful that bis-β-diketone ligand in proper length and flexibility is essential for the construction of multiple-stranded helicates, where two Dy3+ centers in the subtle environment would supple an opportunity to tune the anisotropic axes. Based on our previous work, we have designed a flexible bis-β-diketone ligand BTT (BTT = 3,3''-bis(4,4,4-trifluoro-1,3-dioxobutyl)-m-terphenyl), which is successfully utilized to construt a quadruple-stranded helicate in the formula of [C6H16N]2[Ln2(BTT)4] [Ln = Ce (1), Dy (2)]. Structural analysis indicates that they crystallize in the tetragonal space group P4/n, and each Ln3+ center is chelated by four diketonate moieties from four ligands, giving rise to the formation of dinuclear quadruple-stranded helicate. Magnetic measurement shows that 2 displays single molecular magnet behavior under an applied dc field of 2000 Oe. Further investigation indicates that the anisotropic axes of the Dy3+ centers could be tuned, depending on the bis-β-diketonate ligands used to assemble the Dy helicates.

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Article information


Submitted
21 Nov 2019
Accepted
28 Jan 2020
First published
29 Jan 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

Crystallization and Single Molecule Magnetic Behavior of Quadruple-stranded Helicate: Tuning the Anisotropic Axes

X. Gao, L. Li, W. Sun and P. Chen, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/C9DT04483C

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