Abstract
Chiral metal-organic frameworks (CMOFs) [Ni((L)-ccba)(1,3,5-tmib)(H2O)0.5]n (HU17-L ) and [Ni((D)-ccba)(1,3,5-tmib)(H2O)0.5]n (HU17-D ) were prepared from alanine derivatives (L)-H2ccba and (D)-H2ccba in the presence of auxiliary N-donor linker 1,3,5-tmib (H2ccba = 4-((1-carboxyethyl)-carbamoyl)benzoic acid, 1,3,5-tmib = 1,3,5-tris(2-methyl-1H-imidazol-1-yl)benzene). HU17-L and HU17-D are three-dimensional (3D) enantiomers based on dinuclear [Ni2(CO2)2(H2O)]2+ clusters. Helical motifs are their outstanding structural features. In HU17-L and HU17-D , (L)-ccba2- and (D)-ccba2- anions constructed left-handed (L)-ccba-Ni chain and right-handed (D)-ccba-Ni chain through chiral transfer, respectively. Moreover, achiral 1,3,5-tmib linkers were bridged together by Ni(II) centers to obtain left-handed 1,3,5-tmib-Ni chain in HU17-L and right-handed 1,3,5-tmib-Ni chain in HU17-D via asymmetric induction, respectively. Topological analysis revealed that these frameworks are 8-connected fcu nets with point symbol (424.64). Magnetic tests indicate that antiferromagnetic interactions exist in these complexes.
Published Version
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