分子凝胶中有机化合物的结晶机制

项目名称： 分子凝胶中有机化合物的结晶机制

项目编号： No.21473110

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 刘凯强

作者单位： 陕西师范大学

项目金额： 90万元

中文摘要： 不同于传统的化学凝胶，分子凝胶是以小分子化合物为胶凝剂，通过超分子弱相互作用而形成，具有类型多样、溶剂适应性强等突出优点，特别是当受到物理或化学刺激时表现出明显的相态变化，在无缺陷晶体培养与含能材料制备等方面具有潜在的应用价值。然而，分子凝胶作为新型结晶介质的相关研究报道很少。本项目以高分子凝胶结晶理论为基础，围绕分子凝胶介质中结晶过程所涉及的空间限域效应、耦合效应、溶剂效应与温度效应诸多因素，选取课题组业已成熟的一系列典型的透明分子凝胶为结晶介质，以具有在胶凝溶剂中结晶行为匹配的有机化合物作为待结晶对象，通过典型的实验设计与实施，期望揭示分子凝胶介质中有机化合物的结晶规律以及多种效应的影响机制，丰富分子凝胶结晶理论与方法。

中文关键词： 分子凝胶；胶凝剂；自组装；结晶行为；相互作用

英文摘要： Molecular gel is a typical soft material which forms 3-D entangled networks via supramolecular interactions between low molecular wight gelators, entrapping and immobilizing solvent molecules. The gelator structure and solvent nature of molecular gel are simple and changeable and molecular gel commonly exhibits a sol-gel phase reversible behavior under some physical or chemical stimulus. It was shown that molecular gel is a novel and potential medium for organic crystallization, e.g., defect-free crystals, and energetic material production, etc., but there are only a few works about it at the present. On the basis of theories of polymer gel crystallization, the project is to use low molecular weight transparent gels as a media for the templated growth of molecular organic crystals to explore space confinement effect, coupling effect, solvent effect and temperature effect on molecular organic crystallization and their crystal characteristics by choosing transparent molecular gels from the research group and model organic compounds matching the bulk solvent in crystallization. Typical experiments will be carried out to reveal the effect mechanism of organic crystallization in molecular gels, which will enrich the theory and method of organic crystallization in molecualr gels.

英文关键词： Molecular gel;Gelator;Self-assembly;Crystallization;Interaction