Synthesis, Thermochemistry And Sensor Performanes Of Organic-inorganic Coordination Polymers

Inorganic-organic coordination polymer is a series of porous materials constructed bymetal ions as connected centers and polyfunctional organic ligands as linkers usually. MOFshave attracted a great deal of interests for their diverse topology frameworks as well as theirpotential applications in the field of gas storage, separation, catalysis, chemical sensor,luminescence and magnetism. Different structure can be designed through combinations ofdifferent inorganic and organic units, so that these materials perform a rich variety oftopology and unique structure compared to traditional inorganic molecular sieve. In recentyears, inorganic-organic coordination polymer as a promising hydrogen storage material,scientists worldwide great concern to a lot of researches and published a number of scholarlyarticles. USA’s Yaghi, Japan’s Kitagawa and France’s Férey research teames madeimpressive achievements in the performance, structure and synthesis of coordinationpolymers. In China, there are a lot of the research groups of MOFs years of extensive andin-depth research. And produce a certain effect in the international arena. Jilin UniversityJUC-48reports represent a class of hydrogen storage materials(MOFs) in our research anddevelopment level.Heat capacity is one of the basic thermodynamic properties of the material, its manytheoretical studies of the physical and chemical, is the basis of energy and materialsengineering, has important significance. According to the laws of thermodynamics, theformation of metal and organic ligand coordination polymer based on the study of theformation of the research papers on thermodynamic properties is relatively less. In this thesis,we focus on the synthesis, adsorption and sensor of novel porous coordination polymers. Fourmaterials have been synthesized and use the experimental method to measure the four kindsof complexes of molar heat capacity, the result is satisfactory.Solvothermal reaction of nickel/cobalt metals with1,3,5-benzenetricarboxylicacid haveresulted in two novel coordination polymers: C1-C2. The thermal decompositioncharacteristics of the compound C1was investigated by TG–DSC. The apparent activationenergy of the two steps of the compound C1was calculated by the Kissinger method usingexperimental data of TG analysis. The adsorption of solvents on C2were investigated in-situby quartz crystal microbalance, which indicated that this framework is highly sensitive towater. Solvothermal reaction of cobalt metal with two kinds of ligand(2,6-naphthalenedicarboxylate and4,4’-bipyridine) have resulted in two novel coordinationpolymers: C3–C4, which has three dimensional structure. Two mixed ligands coordinaionpolymers C3and C4have been synthesized and characterized. The thermal decompositioncharacteristics of the complexes were investigated by TG–DSC.The molar heat capacities of four coordination polymers C1, C2, C3, C4were measuredby temperature modulated differential scanning calorimetry (TMDSC) for the first time, andthe important thermodynamic data of them were obtained.