稀土锗氧簇合物的溶剂热合成及性能研究

The rare earth Ge-O cluster compounds developing the new direction of the manufacturing germinates hybrid materials, are becoming hot topics research from home and abroad. The key of these hybrid materials applied widely, lies in the development of synthesis method. Hydrothermal/solvothermal method is an efficient and simple synthesis technique, using this method, it has been confirmed that the rare earth ions could be successfully incorporated into the framework of germinates to form a ternary system. Up to now, the research for the rare earth Ge-O cluster compounds mainly focused on organic ligands containing two carboxylic groups, the exact interaction mechanism of the rare earth ions and Ge-O cluster is still unknown, Frameworks containing Ge-O and the rare earth oxygen clusters need to be developed in further. Through profound investigations, it is helpful for the finding some new rare earth Ge-O cluster compounds and the widespread use of germinates hybrid materials. On the basis of our works, the rare earth Ge-O cluster compounds with luminescent and photocatalysis properties were prepared by mild hydrothermal/solvothermal method, with GeO2 and rare earth ions or oxides as ingredient and COOH-R-NH2、 OH-R-NH2、COOH-R-OH as organic ligands. The effects of rare earth ions and organic ligands on the cluster compounds were investigated and the relationship between the structure and properties of the obtained cluster compounds is discussed in detail.

稀土锗氧簇合物开拓了锗酸盐杂化材料的新方向，正逐渐成为国内外研究的热点课题之一。该类材料能否获得广泛应用，关键在于探索适宜的合成方法。水热/溶剂热法操作简单、省时省力，研究证实采用该法稀土离子可以进入锗氧簇骨架，组成三元体系。迄今为止，对于稀土锗氧簇合物的研究主要集中于含两个羧基的有机配体上，对于稀土离子与锗氧簇结合的相互作用规律尚不十分清楚，且稀土氧簇与锗氧簇混合结构的簇合物有待于进一步研究，深入探究这些问题有助于发现新的稀土锗氧簇合物，进而有利于稀土锗酸盐杂化材料的广泛应用。本项目拟在前期研究工作的基础上，通过温和的水热/溶剂热法，以二氧化锗、稀土离子或者稀土氧化物为原料，利用同时含有羧基和胺基、羟基和胺基及羧基和羟基的有机功能配体，制备出具有发光、光催化等性能的稀土锗氧簇合物；研究稀土离子、有机配体等对稀土锗氧簇合物的影响，并分析其结构与性能间的内在联系。

项目围绕稀土锗氧/钛氧簇合物的溶剂热合成及性能研究展开，探索了不同锗源、稀土原料及有机配体等因素对稀土锗氧簇合物的合成影响。通过优化实验条件，合成出含二羧基有机配体、稀土元素，过渡金属等不同类型的钛氧簇合物，并探究了钛氧簇合物产物的光催化降解与晶体结构的关系,然后利用晶体钛氧簇合物作为前驱体制备薄膜电极进而研究其光电性质，已发表相关研究论文4篇。