环金属铂(II)配合物的超分子动态自组装研究

项目名称： 环金属铂(II)配合物的超分子动态自组装研究

项目编号： No.21503284

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： 李永光

作者单位： 中山大学

项目金额： 21万元

中文摘要： 基于其灵活、动态等特点，超分子动态组装体在智能材料领域有着诸多的应用价值，因此构筑动态组装体系成为超分子领域的研究热点之一。本项目拟以平面结构的环金属铂(II)及光致异构基团偶氮苯作为构筑基元，利用分子间弱相互作用及其协同性构建超分子自组装体系。通过偶氮苯顺反构型的转变调控分子间的弱相互作用，实现超分子聚集体的动态自组装；重点研究通过分子间氢键、金属-金属相互作用、pi-pi 堆积及其协同作用共同诱导形成手性超分子组装体的过程。详细研究组装体基于金属-金属相互作用所产生的特异的光物理性质，借助圆二色光谱和电子显微镜研究分子聚集过程中光学活性及聚集形貌的变化，结合光谱、核磁、XRD等方法深入研究超分子聚集体手性及动态组装的机理，探索聚集体构筑基元的结构特点与超分子手性及动态组装之间的关系,可为利用非手性结构基元构筑手性超分子体系奠定理论和技术基础。

中文关键词： 动态自组装；铂(II)配合物；超分子手性；光响应；弱相互作用

英文摘要： Construction of dynamic supramolecular aggregates has attracted great attention because of their unique features and the increasing potential of their applications as smart functional materials. In the project, square-planar cyclometalated platinum(II) complex and photoisomeric azobenzene group are used as building blocks to construct dynamic self-assembled architectures via various weak interactions and their cooperation. The dynamic supramolecular self-assembly will achieve by photo-stimulus of azobenzene between trans and cis isomers. Importantly, the formation and properties of supramolecular chirality induced by hydrogen bonding, metal-metal interaction, pi-pi stacking interaction and their cooperation will be investigated. Their unique photophysical properties from metal-metal interaction will be studied in details. The optical activities and morphologies will be monitored by means of circular dichroism spectra and scanning/transmission electron microscopy studies, respectively, in the progress of aggregation. The mechanism will be investigated according to the studies of their spectroscopic properties, NMR, XRD results and aggregate morphologies. The relationship between the structural characteristics of the achiral building blocks and chiral and dynamic self-assembly will be explored. It would enrich the theoretical and technical foundation for construction artificial chiral supramolecular architectures by using achiral units.

英文关键词： dynamic self-assemblies;platinum(II) complexes;supramolecular chirality;photo-response;weak interaction