非心金属硼硅酸盐的设计合成及其非线性光学性能的研究

项目名称： 非心金属硼硅酸盐的设计合成及其非线性光学性能的研究

项目编号： No.21501133

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 程琳

作者单位： 天津师范大学

项目金额： 20万元

中文摘要： 有效的设计和合成具有非心结构的化合物，是获得性能优异的非线性光学材料的前提。在无机化合物中，硼酸盐易于呈现出非心结构的特性，从而受到人们的关注。本项目拟在水热/溶剂热条件下，利用具有不对称配位环境的碱（土）金属或具有孤对电子的Pb2+、Bi3+金属阳离子作为结构导向剂,通过非心结构的硼氧簇与刚性SiO4四面体的协同组合，以不同的硼源与硅源作为原料，探索合适的反应温度、反应周期和溶剂，合成具有非心结构的金属硼硅酸盐，总结合成的条件与规律，研究所得化合物的结构与热稳定性，考察不同的非心硼氧簇和不对称配位环境的阳离子对化合物结构的影响。并进行系统的二阶非线性光学性质研究，探讨构效关系。此外，探索分步合成法在硼酸盐化合物中的反应条件，为新型硼酸盐基非线性光学晶体的合成提供实验基础。本项目将推动结构化学、配位化学以及非线性光学的发展，具有重要的科学意义。

中文关键词： 硼硅酸盐；硼氧簇；水热合成；结构与性质；非线性光学

英文摘要： The exploration of new non-linear optical (NLO) materials with excellent performance is premised on the effective design and synthesis of non-centrosymmetrical compounds. Borates are attracting increasing attentions due to their preference to present as non-centrosymmetrical structural characterization. The presented project is to synthesize novel metal borosilicates with non-centrasymmetrical structures. The construction of such structural features is based on the synergistic combination of non-symmetrical BxOy clusters and rigid SiO4 tetrahedron, and the structure-directing cations with asymmetric coordination environment (i.e. alkali metal ion, alkali earth metal ion), or with lone-pair of electrons (i.e. Pb2+, Bi3+). We will explore the reaction temperature, period and solvents under hydro(solvo)thermal conditions with various silicon and boron sources. A detailed comparison will be carried out about the effect of different oxo-boron clusters and cations with different coordination environments on the structures. Furthermore, systematical secondary order non-linear optical measurements will be performed on these materials to explore the relationship between structure and property. Besides, we will probe for the reaction conditions of step method to synthesize borate compounds, providing an experimental playground for the synthesis novel borate-based non-linear optical materials. This project will develop structure chemistry, coordination chemistry and non-linear optics, possessing important scientific significance.

英文关键词： borosilicate;oxo-boron cluster;hydrothermal synthesis;structure and property;non-linear optics