基于咪唑类离子液体构筑非中心对称功能化合物及其光电性能研究

项目名称： 基于咪唑类离子液体构筑非中心对称功能化合物及其光电性能研究

项目编号： No.21271123

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 翟全国

作者单位： 陕西师范大学

项目金额： 75万元

中文摘要： 作为新型的绿色可设计溶剂介质, 离子液体在功能材料合成中的应用近年来备受关注；本项目拟选择系列咪唑类离子液体为溶剂，结合其溶液性质研究的结果，以非线性光学效应和铁电性能为功能导向, 利用其不对称阳离子的模板效应或结构导向作用，离子型溶剂传递不对称信息的高效性, 以及无序咪唑阳离子的无序-有序相变等优势来构筑阴离子配位聚合物体系[RMIm]n[MOFs]，过渡金属卤化物杂化体系[RMIm]n[MXa]和多酸基杂化体系[RMIm]n[POMs]等三大系列非中心对称化合物；采用X-射线单晶衍射和各种谱学测试对化合物进行表征，结合材料性能计算结果，筛选获得结构稳定且性能良好的目标功能材料,培养其大尺寸单晶体，挖掘其应用潜力；本项目的实施对于阐明离子液体在功能材料制备过程中作用的规律性，构筑结构新颖、性能优良和用途广泛的非心晶态材料，揭示其合成、结构与性能之间的内在联系具有重要的学术意义和应用价值。

中文关键词： 离子热合成；无机-有机复合物；金属-有机骨架；光电性能；气体吸附

英文摘要： Within the last few years, significant attention has been paid to the application of ionic liquids as neoteric media for the functional materials synthesis due to their prominent advantages, such as negligible vapor pressures, wide liquidus ranges, good thermal stability, tunable solubility for both organic and inorganic molecules, and much synthetic flexibility. In this proposal, the imidazolium-based ion liquids will be utilized as solvent to prepare three series of novel non-centrosymmetric compounds, [RMIm]n[MOFs]，[RMIm]n[MXa] and [RMIm]n[POMs], which can exhibit important nonlinear optical (NLO) properties and ferroelectric behavior. In our opinion, the ion liquids solvent can effectively lead to non-centrosymmetric compounds because (i) the asymmetric imidazolium cations usually act as templates or structure-directing agents (SDA); (ii) the asymmetric ion liquid solvents can transfer the non-centrosymmetric or chiral information to the product more efficiently than the case in situations, for example, where the chirality of the environment is diluted by the presence of symmetric molecular solvents; (iii) the order-disorder phase change of the imidazolium cations can induce the non-centrosymmetric crystallization. All the resulting non-centrosymmetric complexes will be characterized by X-ray single-crystal

英文关键词： Ionothermal synthesis；Inorganic-organic hybrid solids；Metal-organic frameworks；Photoelectric property；Gas uptake