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Study on Synthesis、Structures and Spectra of Organic-Molybdenum Phosphate Clusters

Author: LinZhengZhong
Tutor: ZhangHanHui
School: Fuzhou University
Course: Organic Chemistry
Keywords: Phosphomolybdate Organic molecules Crystal structure Spectroscopy Quantum chemical calculations
CLC: O641
Type: Master's thesis
Year: 2002
Downloads: 137
Quote: 0
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Abstract


The polyoxometalate compound phosphomolybdate is an extremely important class of substances. MoO 6 octahedral and tetrahedral PO 4 variety of connection between phosphomolybdate has a very rich structure and chemical characteristics, it may constitute one-dimensional chain, two-dimensional layered and three-dimensional grid-like pore structure. Compared to the salt and the inorganic phosphoric acid (or silicic acid, etc.), an organic group having a geometric flexibility and strong complexing ability, the surface state of the inorganic oxide cluster structure can be regulated and modified to a certain extent, so that in having Design and Synthesis of the peculiar structure of the metal oxide cluster compounds can be played on the role of the different structure or performance. Organic - inorganic hybrid material combines the characteristics of both, is one of the hot topics of the present study. This thesis to carry out organic phosphorus molybdate hydrothermal synthesis method and structure, performance, and structure-activity relationship studies. The main tasks are: 1. Synthesis of the 12 kinds of novel compounds of the polyoxometalate and 12 crystal structure is determined by X-ray single crystal structure analysis method. These compounds are: organic - 10 kinds of novel inorganic phosphomolybdate - phosphomolybdate cobaltate and a phosphorus wherein the compound 1 and 2 of the skeleton as a discrete type, while the Compound 3 of the novel skeleton [Cuen) yl The Keidanren into the chain structure. The additional compounds 4 to 10 containing the skeleton, in which the five kinds of the skeleton is discrete, and the other two points M to cbstract were novel chain and lamellar structures. Ten compounds in the presence of extensive hydrogen bonding system. II. On the certain organic Phosphoaluminate infrared spectroscopy, Raman spectroscopy, UV-visible solid diffuse reflectance spectroscopy, dynamic and steady-state fluorescence spectroscopy and thermal gravimetric analysis, infrared and Raman spectroscopy phosphoaluminate the characteristic peaks, the location and structure of the characteristic peaks have a greater relationship; observed in the UV-visible solid diffuse reflectance spectra to the coordination of the oxygen to metal charge transfer transition; fluorescence emission spectra, along with the inorganic skeleton not vary somewhat, some compounds have a longer fluorescence lifetime. 3. Also the use of quantum chemical calculations to investigate some of the compounds into the key and electronic structure characteristics.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Structural Chemistry
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