Abstract
Abstract Two three-dimensional (3D) chiral frameworks, [Cd6(L)4( d -Cam)4(H2O)4]·2H2O (1D) and [Cd6(L)4( l -Cam)4(H2O)4]·2H2O (1L) [HL = 3,5-di(imidazol-1-yl)benzoic acid, d -H2Cam = d -camphoric acid, l -H2Cam = l -camphoric acid], have been synthesized under hydrothermal conditions, which represent a nice example of enantioselectivity of organic racemic ligands ( dl -camphorates) during the self-assembly process and formation of the metal complexes. Compounds 1D and 1L feature 3D framework with chiral chains constructed by Cd(II) cations and camphorate anions. Solid-state circular dichroism (CD) spectra of 1D and 1L revealed that they are enantiomers. Furthermore, the complex with chiral C2 space group displays ferroelectric behavior with a remnant electric polarization (Pr) of ~ 0.140 μC/cm2 and an electric coercive field (Ec) of ~ 17.11 kV/cm.
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