D3h对称性导向聚酰亚胺分子设计及超分子聚集体可调控构筑

项目名称： D3h对称性导向聚酰亚胺分子设计及超分子聚集体可调控构筑

项目编号： No.51473055

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 程琳

作者单位： 华侨大学

项目金额： 78万元

中文摘要： 对称性是认识物质世界的强有力结构特征，三蝶烯在有机化合物中有非常独特对称性D3h。我们提出基于三蝶烯结构基元D3h对称性导向聚酰亚胺分子设计及其超分子聚集体可调控构筑研究。基于三蝶烯结构D3h对称性设计合成可以逐渐调节变化二维平面刚性伸展的苯环的数量和三维结构的新型系列二酐单体，研究该类新型单体的简便有效合成方法、结构特征和聚合反应化学，探索高分子量线型聚酰亚胺的聚合反应体系和方法。通过逐渐调节二酐单体结构中的二维平面刚性伸展的苯环数量和三维结构来调控聚酰亚胺大分子链间相互作用，进而调控聚酰亚胺超分子聚集体凝聚态拓扑结构，研究该类聚合物分别在无场存在与在力学场、 电场和温度场等梯度场中不同层次不同尺度超分子结构的形成机制和演进规律，从超分子化学角度揭示新型聚酰亚胺超分子聚集体的多尺度结构及其结构与性能关系。本研究不仅对三蝶烯化学具有重要意义，而且为聚酰亚胺类先进功能材料研究应用提供新思路。

中文关键词： D3h；对称性；三蝶烯；聚酰亚胺；高分子的超分子结构与性能；可调控构筑

英文摘要： Symmetry is a strong and powerful framework to perceive and predict the physical world,triptycene has very special symmetry D3h with high internal molecular free volume in organic compounds.The research objective of this proposal is to develop the efficient chemistry for the molecular design and modular construction of polyimides with novel supramolecular architectures derived from D3h symmetry of triptycene.We plan to prepare a series of the novel triptycene-based dianhydride with varying number of 2D planar π-extended benzene rings and the shape-persistent core and periphery of different size and dimensionality.we will develop the simple and effective approach for preparation and investigate the structural characteristic and polymerization chemistry of the novel triptycene-based dianhydrides so as to synthesize new linear polyimides with high molecular weight.Using the modular strategy and through careful control and optimization of polymerization,we will construct new poly(arylene triptycene imide)s with different nanoscale supramolecular topological architectures derived from varying number of 2D planar π-extended benzene rings and the shape-persistent core and periphery of different size and dimensionality,in order to gain insight into the effect of the supramolecular hierarchical architectures across different length scales under both field-free and diverse gradient fields such as mechanics,electricity and temperature on the properties,we intend to explore the formation mechanism and evolving law of the novel poly(arylene triptycene imide)s and the relationship between structure and property from the supramolecular chemistry point of view.It is anticipated that this research will not only create new compounds and macromolcules to advance and enhance our understanding in triptycene chemistry and polymer science but also generate advanced functional materials to foster high-tech innovations.

英文关键词： D3h symmetry;triptycene;polyimide;supramolecular architecture and property of macromolecules;modular construction