Combination of Piperazine and Carboxylate Ligands toward the Design of Metal-Organic Frameworks

• Main Authors: Jian-Wen Lin, 林建文
• Other Authors: Long-Li Lai
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/23884179503456587842

碩士 === 國立暨南國際大學 === 應用化學系 === 97 === This thesis describes the self-assembly of a flexible 4,4’-dipyridylpiperazine (2N-DPyP) and rigid or flexible carboxylate ligands and metal ions. The synthetic method, structures and photophysical properties of the products were investigated. Carboxylate including 4,4’-(hexafluoro isopropylidene)diphthalic anhydride (6FDA), benzophenone-3,3’,4,4’-tetracarboxylic dianhydride (BPTDA), 4,4’-oxydiphthalic anhydride (ODA) were employed in the present investigation. Due to three different kind of functional space groups, the metal ions coordinated to the ligands in different modes. The first part of this thesis describes the self-assembly of 1D coordination polymers, such as {[Co(betc)(H2O)4]．(2N-DPyP)0.5(H2O)}n (1), {[Ni(betc)(H2O)4]．(2N-DPyP) 0.5(H2O)}n (2) from non-flexible 1,2,4,5-tetra carboxylate and piperazine ligands. The second part describes the preparation of 3D coordination polymers, {[Ni2(2N- DPyP)2(6FDT)(H2O)2]．(2N-DPyP) 2.5(H2O)}n (3), {[Cd2(2N-DPyP)2(BPTC)(H2O)2]．0.5(H2O)}n (4), [Ni2(2N-DPyP)2(ODT)(H2O)2]n (6) and a 2D coordination polymer, [Ni3 (2N-DPyP)3(HODT)2(H2O)9]n (5), which are self-assembled from flexible carboxylate and piperazine ligands. The third part describes different experimental procedure of the self-assembling synthetic strategy employing piperazine and carboxylate ligands. In this study, the synthetic strategies, X-ray structural characterization, thermal stability and photophysical properties of the synthesized coordination polymers were carried out. Structural variation, particularly differences in piperazine and flexible carboxylate conformation, makes these metal-organic frameworks interesting supramolecules.