Study On The Construction And Properties Of Carboxylic Acid With N-donor Ligand

Metal organic frameworks?MOFs?are composed of metal ions or ion clusters and organic ligands through coordination bonds,which not only have a crystalline porous structure,but also have high porosity and large specific surface area,special surface properties.Metal organic frameworks have been paid more and more attention by researchers.MOFs were synthesized from different N-donor ligands and different metal ions by the solvothermal synthesis.The crystal structure was characterized by single crystal diffractometer and Fourier transform infrared spectroscopy,and so on.The primary investigation contents of this paper are described as follows:In-MOF based on the pts topology was constructed from 4,4',4'',4'''-?9H-carbazole-1,3,6,8-tetrayl?tetrabenzoic acid?H₄CTTB?and indium ions.First,H₄CTTB has been obtained by Suzuki coupling reaction,hydrolysis,acidification,then the In-MOF was constructed by coordination-driven self-assembly with indium ions.The effects of temperature,solvent,mole ratio of reactants and other factors on the final MOFs structure were discussed,Furthermore,the selective adsorption of MOF on dyes was studied.Y-MOF was 3,5-bis?3-carboxyphenyl?-1,2,4-triazole and yttrium ions.First,H₄CTTB has been obtained by Suzuki coupling reaction,hydrolysis,acidification,then the In-MOF was constructed by coordination-driven self-assembly with indium ions.The effects of temperature,solvent,raw material ratio and other factors on the final MOFs structure were discussed.Furthermore,we have focus our study on the effects of temperature,pressure,pH value,mole ratio of reactants and other factors,It is found that the framework is suitable for pervaporation separation of ethanol/water system.