Synthesis and characterization of metal-organic framework based on the porphine derivative

• Main Authors: Yao-Wei Hsu, 許耀維
• Other Authors: 許梅娟
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/kpm2u9

碩士 === 國立成功大學 === 化學工程學系 === 102 === In this work, 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphine (TPyP), a compound of porphine series is used as the precursor for the synthesis of hybrid organic-inorganic polymeric materials. It is via the interactions between the organic precursors as well as the coordination of the metal ions with the precursors to achieve a supramolecular conformation both with rigidity and flexibility. It owns geometric regularity from its repeated and symmetric structure (and chains) while, on the other hand, it also owns the property of softness for the inclusion of guest molecules into its flexible framework. Thus, a kind of soft materials with large molecular weights is created. The formation of the metallo-organic framework could be the consequence of the hydrogen bonds, the pi-pi interaction of the porphine-based plane and the coordination bond from d-orbit of the metal compound. The geometric symmetry of the TPyP precursor is an essential feature contributing to the assembly and therefore the formation of the metallic organic crystal. The metal-TPyP as prepared is measured by an FTIR and a UV/Vis spectrophotometer to analyze the bonding between the metal compound and the TPyP precursor. An SEM, an XRD, and an SAXS are altogether used to discover the micro-structure and also the crystallinity of the Zn(II)-TPyP. Thermo-stability is measured by a TGA. It could be concluded from the result that the framework could remain stable until approximately 600 oC. The synthesized Zn(II)-TPyP in this work is further analyzed by a BET. The BET surface area of 8.41 m2/g, the Langmuir surface area of 12.57 m2/g, and the pore volume of 0.036 cm3/g are all obtained. Additionally, Zn(II)-TPyP is confirmed that it indeed shows good performance in both fluorescence property and electro-conductivity. Different metal ions are also chosen to be coordinated with the TPyP precursor. Among these MOFs (metal-organic frameworks) being synthesized, ZnTPyP is chosen for the absorption investigation on the bilirubin molecules. Consequently, the results already confirm the inclusion ability of the metal-organic polymers towards bilirubin