Design,Synthesis and Properties of One Novel Metal Organic-framework Based on Aspartic Acid
Chiral metal-organic framework materials(CMOFs)have received widespread attention in the resolution of enantiomers of chiral molecules due to their tunable porous structures and unique chiral environment.In this work,a flexible chiral bridging ligand(H4 L)with four carboxylic acid co-ordination groups has been rational designed and synthesized by using dimethyl L-aspartate as the chiral source and naphthalene-1,5-disulfonyl chloride as the bridging linker,respectively.Subsequently,a novel three-dimensional(3D)chiral metal-organic framework,[Ni2(H2 L)2(bpy)3·(H2 O)2](CMOF-1)was assembled by the solvothermal reaction of H4 L,4,4'-bipyridine(bpy)and nickel ions(Ni2+).In addition,the enantioselective adsorption experiment of CMOF-1 towards 1-phenylethanol showed that CMOF-1 could recognize and absorb preferentially the S-enantiomers of 1-phenylethanol,affording chiral 1-phenylethanol with 51%ee.This result indicated that CMOF-1 is a promising chiral adsorbent.
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