Abstract
Malates and aspartates [M2(asp)2L] and [M2(mal)2L] (M=Cu, Co, Ni; L=ditopic rigid organic ligand) represent the family of isoreticular frameworks where all structural units (metal cations, chiral ligands and bridging ligands) could be changed with retention of the topology in the resulting framework. The compound [Ni2(mal)2(bpe)]·3H2O has a different structure and contributes to a different family of isoreticular homochiral MOFs. [Display omitted]
► The family of isoreticular malate frameworks has been synthesized. ► Structural units could be changed with retention of the topology in the framework. ► Nickel malate with bis(4-pyridyl)ethylene contributes to a new family of MOFs.
Three new homochiral metal–organic frameworks (MOFs) based on malate anions and N-donor linkers of different length have been prepared. [Co2(mal)2(bpy)]·2H2O (1), [Ni2(mal)2(bpy)]·2H2O (2), [Ni2(mal)2(bpe)]·3H2O (3) (mal=S-malate, bpy=4,4′-bipyridyl, bpe=trans-1,2-bis(4-pyridyl)ethylene) were characterized by a number of analytical methods including single crystal X-ray analysis. Optical purity of compounds 2 and 3 was confirmed by polarimetry experiments. Compounds 1 and 2 contribute to the family of isoreticular M(II) malates and aspartates ([M2(asp)2L] and [M2(mal)2L], M=Cu, Co, Ni; L=ditopic rigid organic ligand) where all structural units (metal cations, chiral ligands and bridging ligands) could be changed with retention of the topology in the resulting framework. Compound 3 has a different structure and contributes to a different family of isoreticular homochiral MOFs.