有机-无机三缺位杂多钼氧簇稀土金属衍生物光电材料制备及性能研究

In this project,organic-inorganic heteropolymolybdate rare-earth metal derivatives photoelectric materials based on trivacant Keggin polyoxoanions will be prepared by conventional syntheses and hydrothermal syntheses.In order to obtain the functional materials having excellent photoelectric properties,some polycarboxylic acid functional organic ligands that have delocalized electron and can enhance fluorescence property will be selected.In order to provide new methods for the design and syntheses of novel heteropolymolybdates,the factors influencing the formation of rare-earth substituted trivacant heteropolymolybdates will be researched.The correlations of their structures,space dimension and the coordination environment of rare earth metal ions will be studied. This project will provide theoretic and experimental basis for the photoelectric study of other type polyoxometelates.At last,the project will exploit excellent photoelectric functional materials to widen the application field of heteropolymolybdate rare-earth derivatives and realize the comprehensive development and utilization of molybdenum resources in China.

本项目拟通过常规合成法和水(溶剂)热合成法，选择具有离域电子和增强荧光性能的多羧酸功能有机配体，制备基于三缺位Keggin结构阴离子形成的有机-无机杂多钼氧簇稀土金属衍生物，以期获得具有优良光电性能的功能材料。研究影响稀土取代三缺位杂多钼氧簇的形成因素，为新型杂多钼氧簇的设计、合成提供新方法。探索结构、空间维度和稀土金属离子配位环境与光电性能之间的关系，为其它多金属氧酸盐光电性能研究提供实验依据和理论基础。开发具有优良光电功能特性的复合材料，拓宽杂多钼氧簇稀土金属衍生物的应用领域，实现我国钼资源综合开发和利用。

本项目通过常规合成法和水热合成法，通过选择不同的多金属氧酸盐前驱体和不同结构的羧基配体，合成了多系列的有机-无机杂多钨酸盐和有机-无机杂多钼酸盐化合物，并对其进行了元素分析、红外光谱、紫外光谱、热重分析、X-射线粉末衍射和X-射线单晶衍射测试，探索了不同羧基配体对结构的影响，并对其光学和磁性性能进行了研究。本项目的研究，不仅丰富了多金属氧酸盐的结构，而且为开发新型光学、磁学材料提供了理论基础。