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Preparation and Catalytic Activity of Natural Polymer Supported Quasi-Porphyrin Metal Complexes

Author: HaoErXia
Tutor: WangRongMin
School: Northwest Normal University
Course: Polymer Chemistry and Physics
Keywords: Polymer porphyrin metal complexes Metal phthalocyanine Porphyrin Chitosan Photocatalytic Catalytic Oxidation
CLC: O643.32
Type: Master's thesis
Year: 2009
Downloads: 134
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Abstract


Porphyrin-metal complexes (such as metal-free phthalocyanine, metal porphyrins, etc.) are a class of planar macrocyclic complexes, they are in a unique high catalytic activity and selectivity has become an important catalyst in many fields, in addition, a phthalocyanine or a class good photosensitizer porphyrin-like metal complexes is very promising for a class of functional polymer materials. Chitosan is an excellent natural polymeric materials, and most of the chitosan metal complex redox reaction to exhibit high catalytic activity and selectivity, is an ideal choice for the catalyst carrier. Porphyrin metal complex is carried in a polymer carrier to prepare a heterogeneous catalyst, its catalytic activity decreased significantly due to a phthalocyanine, a porphyrin molecule is easy to form a dimer and other issues can be avoided, but also so that after treatment of the catalyst is very easy to recycle and reuse. Thus, the synthesis of novel load class porphyrin metal series complexes applied to photocatalysis, catalytic oxidation of a variety of olefins, aromatics, and other significance. With the material synthesis and properties of the papers in our group about the high molecular clustering porphyrin metal based on the synthesis of a series of chitosan Tam containing porphyrin metal complexes and studied its photocatalytic and catalytic oxidation performance . The thesis is divided into the following four parts: the first chapter, first introduced the structure and nature of the porphyrin-metal compounds, and then reviewed several natural polymer carrier structure, nature and its sponsoring containing porphyrin compounds in catalysis . The second chapter, phthalocyanine supported on chitosan membranes made of chitosan - phthalocyanine film (CTS-M-CoPc), and IR and UV spectra, thermal gravimetric analysis, scanning electron microscopy, X-ray diffraction gel chromatography - 18-angle laser light scattering method for the CTS-M-CoPc its raw materials were characterized. In the high-pressure mercury lamp, the CTS-M-CoPc placed in a solution of Rhodamine B performance CTS-M-CoPc solution of Rhodamine B photodegradation. The results show that the initial concentration of the aqueous solution of rhodamine B 1 × 10 -5 mol / L, the amount of catalyst 0.5 g / L, pH = 6 pm, CTS-M-CoPc Rhodamine B light degradation rate of the aqueous solution. Chapter prepared chitosan - phthalocyanine microspheres (CTS-MS-CoPc), and structural characterization. Molecular oxygen as the oxidant cumene, examines the properties of catalytic oxidation of the CTS-MS-CoPc. The results showed that the polymer catalyst cumene oxidation showed high catalytic activity, oxidation products mainly for cumene hydroperoxide (CHP) and 2 - phenyl - 2 - propanol (PP), the optimal reaction The temperature should be controlled at about 100 ° C, suitable catalyst / cumene than for 1mg/2mL. Add trace ionic liquids have a certain influence on the catalytic activity of the CTS-MS-CoPc. CTS-MS-CoPc also been investigated for cyclohexene, and other aromatic hydrocarbons the catalytic performance, the study found that the polymer catalyst also showed superior catalytic oxidation performance. Chapter IV porphyrin carrier in the chitosan microspheres prepared chitosan - Porphyrin microspheres [CTS-MS-the TPPS4-M (M = Cu, Zn, Co, Ni), and the structural characterization. Molecular oxygen as the oxidant cumene investigated the catalytic oxidation performance of the CTS-MS-TPPS4-M. CTS-MS-TPPS4Cu strong performance of catalytic oxidation. The results show that: the use of chitosan membrane the chitosan microspheres Tam containing porphyrin metal complexes with high catalytic activity, is a class with a potential value of new polymer catalyst.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalytic reaction
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