Synthesis, Crystal Structures and Properties of Alkali Metal Coordination Polymers

• Main Authors: Ting-Kuang Chang, 張廷光
• Other Authors: Chia-Her Lin
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/15875624725079691179

碩士 === 中原大學 === 化學研究所 === 101 === For Elevent new coordination polymers have been synthesized under hydrothermal reactions and characterized by single crystal analysis. The reaction of benzenehexacarboxylic acid and tetrahydrofuran-2,3,4,5-tetracarboxylic acid with alkali metal ions. In addition, three new lithium coordination polymers were also synthesized between aromatic carboxylic acids and lithium ions. Moreover , metal coordination polymers were tested as anode materials for lithium ion batteries. The chemical formula of 1 to 11 are as follows: [ Li4(H2BHC)(H2O)4 ]·2H2O (1) [ Li6(BHC)(H2O)8 ] (2) [ Li4(H2BHC)(H2O)4 ] (3) [ Na3(H3BHC)(H2O)4 ] (4) [ K3(H3BHC)(H2O)2 ] (5) [ Rb2(BHCA) ] (6) [ Rb3(H3BHC)(H2O)2 ] (7) [ Li6(HTFTA)2(H2O)3 ]·3H2O (8) (NH4)[Na13(HTFTA)2(TFTA)2]·4H2O (9) [ K(H3TFTA) ] (10) [ Rb(H3TFTA) ] (11) In section one, eleven new coordination compounds 1-11 were synthesized by two different carboxylic acids and alkali metal ions. The single crystal structure analysis showed that all compounds are 3-D metal-organic framework. All compounds were further characterized by powder X-ray, elemental analysis, thermogravimetric analysis, UV-VIS spectra, photoluminescence and IR spectroscopy. In section two, the compounds 1、3、4 and 5 were tested as anode materials for lithium ion batteries. All new electrodes were characterized by powder X-ray, elemental analysis, cyclic voltammetry and charge-discharge test.These new anode materials display discharge capacity of above 100mAh/g at 0.1C rate and a stable cycle performance within thirty cycles, but capacity was decreased.