Synthesis, Structures And Properties Of Multifunctional Metal-organic Frameworks

The metal-organic frameworks （MOFs） reflect the large value in many applications,which has the huge space of development and prospects of application in the21stcentury. Their channels are regularity, and some also have three-dimensional open andinterconnected pores. Based on these advantages, the applications can be achieved ongas storage and separation, selective catalytic, nanoparticles wrapped, and so on. It wasanother important porous material in the application after molecular sieve. Meanwhile,chiral MOFs also have great potential applications in the optical and ferroelectricphysics. It has become one of the most active area shows to explore the versatility ofnovel chiral multifunctional MOFs by combining the photoelectric properties with theporous nature.In this thesis, we have synthesized a novel organic ligand and thus built themultifunctional chiral MOFs in taking design and synthesis perspective. Further, thefactors that affect the structures and properties are also explored. A chiral camphorderivative has been designed and synthesized by simple organic reaction [D-H₂ctba,D-4-（3-carboxy-2,2,3-trimethylcyclopentanecarboxamido）-benzoic acid]. Then, the[Cd₃O（ctba）₃]_n（1） have been obtained after occurring a self-assembly reaction betweenthe chiral compound and cadmium （Ⅱ） nitrate. Additionally, the luminescent spectrumof compound1shows a strong fluorescence at room temperature.[Zn₂（ctba）₂·H₂O]（2）,has been prepared under solvothermal conditions. Compound2shows capability forseparating water from alcohols and the ferroelectric behaviors, which are ascribed tochiral camphoric acid and amide groups. The results show that the functional groupplays a crucial role in the frameworks and multi-functional MOFs have broadapplication prospects.In order to obtain the compound of high specific surface area, this thesis has beendesigned and synthesized a rigid dendritic ligand, four imidazole nitrogen-containingheterocyclic compound [tetra（4-imidazolylphenyl）methane, Tipm]. A series ofcompound by Zn （II） with different anions,[Zn（Tipm）（NO₃）₂]_n（3），[Zn₂（Tipm）Cl4]_n（4） and [Zn（Tipm）SiF₆]_n（5） have been obtained using this ligand. There topology structuresare studied. Compound3and4have interpenetrating dia topology which affects theirpore size. Compound5has fsc topology with one-dimensional open pore structure.This thesis provides some experimental experience in the design and synthesis ofMOFs ligand, particularly in the synthesis of chiral MOFs. It has a broader prospecthow to reasonably design and build metal-organic frameworks...