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A pair of mononuclear Dy(III) enantiomers showing single-ion magnet and ferroelectric properties

Abstract

Using enantiopure ligands (–)/(+)-4,5-pinene-2,2ʹ-bipyridine (LR/LS) to react with Dy(btfa)3•2H2O, respectively, a pair of Dy(III) enantiomers with the formulae Dy(btfa)3LR (R-1 ) and Dy(btfa)3LS (S-1, btfa– = 3-benzoly-1,1,1-trifluoroacetonate) were obtained and structurally characterized. Each Dy(III) ion in R-1 and S-1 is octa-coordinate and adopts approximately square-antiprismatic (SAP) geometry with D4d symmetry. The studies on the magnetic and ferroelectric properties of R-1 were carried out and the investigation result of the magnetic property revealed that it displays slow magnetic relaxation behavior under zero direct-current (dc) field, confirming its single-ion magnet (SIM) characteristic with the effective energy barrier of 95.4(1.5) K. Moreover, R-1 crystallizes in ferroelectric point group C1, and exhibits ferroelectricity with notable remnant polarization (Pr) value of 3.75 μC/cm2 at room temperature. All these research results also suggested that R-1 and S-1 are potential multifunctional molecule-based materials combining chiroptical activities, ferroelectric and SIM properties within one molecule.

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Publication details

The article was received on 06 Apr 2018, accepted on 10 May 2018 and first published on 11 May 2018


Article type: Paper
DOI: 10.1039/C8NJ01659C
Citation: New J. Chem., 2018, Accepted Manuscript
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    A pair of mononuclear Dy(III) enantiomers showing single-ion magnet and ferroelectric properties

    X. Li, C. Zhu, Q. Rong, J. Wei, R. Li and C. Liu, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ01659C

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