Studies On Syntheses, Thermochemistry And Applications Of Metal-Organic Frameworks

Metal-organic frameworks have the characteristics of high surface area and porosity for excellent adsorbent. In the thesis, syethsis and their chemical sensing and thermochemistry properties of metal-Organic frameworks were studied in this paper. There were four metal-organic frameworks such as FeBTB (C1), AlBTB (C2), ZnBTB (C3), and CdBTB (C4) which were successfully synthesized under solvothermal conditions, and with4,4’,4"-benzene-1,3,5-tribenzoate acid (H3BTB) and1,3,5-benzene-tricarboxylic acid (H3BTC) selected as the bridging organic ligands.When utilizing the quartz crystal microbalance (QCM) to investigate in situ the sensing and adsorbing properties for MOFs molecles, we found that methanol can be adsorbed the compound C1and C2; this indicates the C1is highly sensitive and response frequencies for methanol. Similarly, the compound C2is also shown a significant sensing and response frequencies for pyridine. This indicates that these materials may be prepared a new sensor used to test the micro-methanol or micro-pyridine, and thereby have the critical application values in the sensing and environment testing.The mole thermal capacity at low temperature for metal organic frameworks:C1, C3and C4synthesized were tested by temperature modulated differential scanning calorimetry (TMDSC), and derived their thumb formula. Their mole thermal capacity at298.15K were calculated, and the values of Cl, C3and C4are441.0,559.7and990.0J k-1mol-1, respectively. Also, their thermodynamatic functions at298.15K are HT-H298.1s and are derived.