Synthesis Of Homochiral And Lanthanide Based Metal Organic Frameworks

The research of coordinatin polymers not only connects inorganic and organic chemistry but also involves basic theory and applications. In recent years, this area has become the advanced study of Inorganic chemistry, crystal chemistry and material chemistry in the internation, which is vital varieties of material science, is fertile field and has attractive applied values. The chiral metal-organic frameworks (MOFs) as an important branch of coordination polymers, have attracted the attention of the chemical workers for the potential applications in the selective catalysis, molecular recognition, optoelectronics, magnetic properties, the main object of exchange and molecular conductors.In this paper, research efforts are mainly focuses on the synthesis of chiral metal organic framework based on chiral ligands. We have synthesized five novel homochiral porous MOFs based on camphoric acid by adding different ancillary ligands in order to increase the size of pore structure through hydrothermal synthesis. In order to further increase the size of the hole and introduce more functionalities in the structure, we have chosen polyoxometalates as a template which could serve as functional groups, and built a new rare earth MOF. Complexes 1-5 were studied by X-ray crystallography, TGA,IR and CD spectrum.1. The four homochiral complexes with the formula [M₂(CA)₂(BPP)]_n [M=Co,Ni,Cu, Cd; H₂CA=D-(+)-Camphoric acid, BPP= 1,4-Bis(4-pyridylmethyl)piperazine], which were synthesized through hydrothermal synthesis, consist of CA-bridged (4,4) layers with [Co₂(O₂CN)₄] clusters as the secondary building units (SBUs). The SBUs were connected by CA ligands into 2D homochiral layers and were further linked by BPP ligands into a 3D framework.2. The homochiral complex with the formula [Co₂(CA)₂(HBI)₂]·H₂O [HBI=1-(4-Hydro-xybenzyl)-imidazole] consists of the similar 2D homochiral layers as that in the front four complexes, which were packed through the weak interaction (hydrogen bonding andÏ€-Ï€stacking) between HBI ligands into a unique 3D supermolecular framework.3. The porous complex with the formula [Ho_1.5K_1.5(dpdo)₅(OH)]·10H₂O(dpdo=4,4'-bipyridine-N,N'-dioxide) was synthesized through hydrothermal synthesis by introducing polyoxometalates as a template.