Syntheses, Characterizations and Foaming Properties of Magnesium Coordination Polymers by 1,2,4-benzenetricarboxylic acid

• Main Authors: Wei-Hang Huang, 黃瑋翰
• Other Authors: Chia-Her Lin
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/85606005253578547072

碩士 === 中原大學 === 化學研究所 === 98 === A series of magnesium coordination polymers, Li[Mg3(OH)(BTC)2(H2O)3]•4H2O (1), Na[Mg3(OH)(BTC)2(H2O)3]•4H2O (2), K[Mg3(OH)(BTC)2(H2O)3]•4H2O (3), Rb[Mg3(OH)(BTC)2(H2O)3]•3H2O (4), Cs[Mg3(OH)(BTC)2(H2O)3]•3H2O (5), (NH4)[Mg3(OH)(BTC)2(H2O)3]•3H2O (6), [Mg3(OH)(BTC)2(H2O)2]•H2O (7) and [Mg3(OH)(BTC)2(H2O)2]•0.5H2O• 0.5EG (8) (BTC = 1,2,4-Benzenetricarboxylate anion), were synthesized by solvothermal reactions and microwave synthesis. compounds 1~6 were synthesized between magnesium nitrate, BTC and BOH (B=Li,Na,K,Rb, Cs,NH4). The crystal structure analysis showed that compounds 1~6 have similar 3D framework which was connected by Mg3O14 SBU(secondary building unit) and asymmetric BTC. Monovalent cations in the compounds can balance the charge. Complexes of 2~5 containing Na、K、Rb、Cs showed the foaming phenomenon when heated above 500℃. Ion radii will also influence the amount of solvent molecules. In section two, we used same ligand and metal but got different framework 7 and 8 connected by Mg4O18 SBU and BTC. These complexes were also characterized by Powder X-ray diffraction, elemental analysis, thermogravimetric analysis, IR spectroscopy, UV-VIS spectra, photoluminescence.