| In recent years,metal-organic frameworks(MOFs)have attracted attention as a novel porous material,which is constructed by metal ions or metal clusters and organic ligands.Due to its diversity of structures,porosity,high specific surface area,and tunable structure,it has been widely used in many fields,such as gas adsorption,storage and separation,heterogeneous catalysis,fluorescence sensing.In this paper,eight metal-organic compounds were constructed by tris((4-carboxyl)phenylduryl)amine organic carboxylic acid ligands and four different neutral ligands with transition metal ions.We studied the structure and gas adsorption,fluorescence sensing,dye adsorption,and other properties of these compounds,and use three kinds of metal-organic frameworks(MOFs)constructed by triphenyltricarboxylic acid and tris((4-carboxyl)phenylduryl)amine which have been reported to studied their gas adsorption and heterogeneous catalysis properties.This paper contains four chapters.The first chapter introduces the concept of metal-organic framework materials,the synthesis method,and the current research progress of MOFs constructed from tris((4-carboxyl)phenylduryl)amine and triphenyltricarboxylic acid in gas adsorption,heterogeneous catalysis,and fluorescence sensing areas.The second chapter uses tris((4-carboxyl)phenylduryl)amine ligand(H3TPA)as the main ligand,and ancillary ligands bisimidazole butane(bbi)and 4,4’-dimethylene imidazole benzene(bibp),1,3-bismethylene imidazole benzene(bib),1,4-bis(imidazole-L-methyl)toluene(bix)with transition metal ions(Zn2+,Cd2+,Mn2+,Cu2+)synthesized eight types of MOFs:[Cu3(TPA)2(bbi)2(H2O)](Compound 1),[Zn9(TPA)6(bbi)3(DMF)3](Compound 2),[Cd3(TPA)2(bibp)2](Compound 3),[Zn3(TPA)2(bib)](Compound 4),[Cd3(TPA)2(bib)2](Compound 5),[Cu1.5(TPA)(bib)](Compound 6),[Zn3(TPA)2(bix)](Compound 7),[Mn1.5(TPA)(DMA)(H2O)]·DMA(Compound 8),and a compound[Cd3(TPA)2(bimb)3(H2O)2](Compound 9)which has already reported by degree 2014 graduateed student Shi Hui in the dissertation.Both Compound 1 and Compound 9 have a three-dimensional network structure with open sites.After activation,they can adsorb CO2,H2,C2H4,C2H6,C3H6,and C3H8 molecules.Compounds 1 and 9 are both potential separate C3/C1 materials.Compound 3 enables sensitive detection of small organic molecules through vapor fluorescence sensing which are toxic to humans,such as salicylaldehyde and nitrotoluene.The third chapter uses two MOFs that have been reported for performance studies.The triphenyltricarboxylic acid(H3TCA)is the main ligand,with the auxiliary ligands bisimidazole butane(bbi),1,3-bismethylene imidazole benzene(bib)and transition metal ions(Cd2+,Mn2+)respectively.Two types of MOFs were constructed:[Cd3(TCA)2(bbi)3(H2O)2](compound 10),[Mn3(TCA)2(bib)(DMA)2](compound 11).Compound 10 has both Lewis acid and Lewis basic sites.It shows excellent catalytic performance in Knoevenagel condensation reaction and cyanosilylation reaction,and both reactions show the law of the conversion influenced by size effect,substituent effect and molecular rigidity.Compound 11 has a certain adsorption of CO2 at 298K,has a high isothermal adsorption heat of CO2.Compound 11 also has a Lewis acid site in the structure,showing good catalytic activity in the coupling reaction of epoxide and CO2.The fourth chapter of this paper summarizes the current research results and innovations of the paper,and prospects the application of MOFs as heterogeneous catalytic materials and gas adsorption separation. |
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