Synthesis, Adsorption And Sensor Performances Of Porous Coordination Polymers

Porous coordination polymers are formed by metal ions with organic ligands andformationed through coordination bond self-assembly, with various structure formsand unique optical, just like electrical, magnetic, adsorption, catalytic properties.They have great application prospect in many ways. Become a research focus of newfunctional material.In this paper, we focus on the synthesis, thermodynamics, adsorption and sensingproperties of novel porous coordination polymers. Four reported in the literaturecoordination polymers have been synthesized in this study.Two mixed ligands coordination polymers C1and C2have been synthesized.Utilization of1,3,5-benzenetricarboxylic acid as oxygen ligand and4,4’-bipyridineas nitrogen ligands synthesized two coordination polymers which have the samestructure: Ni（HBTC）（4,4’-bipy）·3DMF （C1） and Co（HBTC）（4,4’-bipy）·3DMF （C2）.Study on the adsorption of C1using quartz crystal microbalance （QCM）. We foundthat C1have apparent adsorption on H₂O. The adsorption of CO₂and CH₄for C1under273K condition were test. At P/P0=1, the adsorption molar capacity of CO₂and CH₄is22.4:1.Two complexes Ni₉（btz）₁2（DMA）₆（NO₃）₆（C3） and Zn₅（btz）₆（NO₃）₄（H₂O）（C4）have been synthesized under solvent thermal conditions use of transition metal withnitrogen ligand. We using quartz crystal microbalance （QCM） study the adsorptionof C3. C3showed a significant response frequencies to H₂O.The molar heat capacities of four coordination polymers C1-C4were measuredby modulated differential scanning calorimetry （TMDSC） for the first time. Theimportant thermodynamic data were obtained. And the thermodynamic databaseenriched.