Title
Construction and crystal structure of a pair of tetranuclear Zn(II) chiral clusters that exhibit ferroelectric behavior under a higher frequency electric field at room temperature
Author
Haiyang Yu, Meiying Liu, Xuechuan Gao, Zhiliang Liu
Year
2017
Journal
Polyhedron
Abstract
A pair of novel enantiomerically chiral clusters, R/S-[Zn4(HL)2(L)2·(CH3OH)2]·(NO3)2, have been obtained via the self-assembly of R/S-H2L Schiff base ligands with divalent zinc nitrate (H2L = 2-[(1-benzyl-2-hydroxy-ethylimino)-methyl]-6-methoxy-phenol). The compounds were characterized by single-crystal X-ray diffraction, elemental analysis and infrared spectroscopy. Their structures reveal that the enantiomers are not only in a chiral space group but also have a non-centrosymmetric polar packing arrangement. Both clusters display ferroelectric behavior at room temperature. Impressively, the clusters show well-defined ferroelectric hysteresis loops with high Ps values at a relatively high frequency of 100 Hz, which is very rarely in the field of molecule-based ferroelectrics.
Instrument
J-810
Keywords
Circular dichroism, Cotton effect, Stereochemistry, Solid state, Organic chemistry