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The Type of Polyacid of Organic-Inorganic Hybrid Materials: Synthesis, Characterization and Properties

Author: LinYanYan
Tutor: WangShiMing
School: Fujian Normal University
Course: Inorganic Chemistry
Keywords: Hybrid materials Phosphotungstic acid Polymerization cyclodextrin Photocatalytic Isonicotinato Crystal structure
CLC: TB34
Type: Master's thesis
Year: 2010
Downloads: 83
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Abstract


Multi- acid organic - inorganic hybrid materials is a class of molecule-based functional materials with good optical , electrical and magnetic properties , in the field of catalysis, drug and functional materials has broad application prospects . The new multi- acid organic - inorganic synthesis and properties of hybrid materials , has become extremely active field of materials science one , not only is the new growth point of the multi- acid chemistry applied research , synthetic materials research frontier . This selection of polymerization cyclodextrin ( CDP ) , prepared as an inorganic component 8 - hydroxyquinoline / furfural polymer (HQ / FF) and isonicotinato different organic components Keggin structure phosphotungstic acid (HPW) a series of organic - inorganic hybrid materials the CDP / HPW the HQ / FF -HPW phosphotungstic acid - isonicotinic acid supramolecular compound ([C6H5NO2] 2 [PW12O40] · H20). By IR , UV-visible diffuse reflectance spectroscopy , X - ray photoelectron spectroscopy , X - ray powder diffraction and cyclic voltammetry and other means were used to characterize the synthesized compounds . The single-crystal X-ray diffraction analysis of the crystal structure of the the acid isonicotinato supramolecular compounds . In the above synthesis of research on the basis of (1) to explore the the hybrid materials CDP / HPW photochromic sexual ; methyl orange as a probe molecule to examine in detail the photocatalytic activity of CDP / HPW and its influencing factors . The results show that the CDP-HPW the reversible photochromic ultraviolet efficient light catalytic degradation of high concentrations of methyl orange solution . Moreover , a good stability of the catalyst used can be reused . ( 2) at room temperature , the hybrid materials HQ / FF -HPW enhanced compared to the ESR signal of the HQ / FF many also significantly improve the thermal stability of the material . Methyl orange as a probe molecule investigated the photocatalytic activity of the hybrid materials . The results show that the catalytic performance of catalyst with ultraviolet light , visible light photocatalytic activity . (3 ) the acid isonicotinato supramolecular compounds crystal structure shows that the compound has a three-dimensional microporous structure of protonated isonicotinic acid cation heteropolyanion together through hydrogen bonds .

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