功能化环糊精树型超分子光捕获体系的构筑与性质研究

It is one of the focuses of current research that the construction of controllable supramolecular light-harvesting systems, and its application in the rational utilization of light energy, the regulation of photochemical reactions, and the development of “smart” photoluminescent and photovoltaic materials. In this project, antenna molecule (BODIPY derivative) and dendritic energy receptor (porphyrin derivatives) will be connected through host-guest interaction and meanwhile, redox ferrocene and photochromic diarylethene groups were introduced, to construct a series of dendritic supramolecular light-harvesting systems mediated by cyclodextrins. The morphology, assembly mode, energy transfer efficiency and antenna efficiency of these systems will be researched through transmission electron microscope, dynamic light scattering, UV-vis absorption spectrum, fluorescence spectrum, density functional theory calculation and so on. Then, the mechanisms of photo/electro-chemical controlling energy transfer between antenna molecule (receptor center) and receptor center (photochromic molecule) will be uncovered. This is of great scientific significance for further development of supramolecular photochemistry, which is applied to controllable artificial light-harvesting system, intelligent photoluminescent materials, photoelectric materials, biological materials and so on.

可控超分子光捕获系统的构筑及其在合理利用光能、调控光化学反应、发展智能发光材料和光电材料方面的应用是当前研究的热点之一。本课题拟通过主-客体化学的方法将主体氟硼荧衍生物作为天线分子和客体卟啉衍生物作为能量受体中心，引入氧化还原特性的二茂铁或光致变色特性的二芳基乙烯，构筑一系列功能化环糊精为媒介的树型超分子光捕获体系。通过透射电镜、动态光散射、紫外-可见吸收光谱、荧光光谱、密度泛函理论计算等手段研究该体系的形貌、组装模式、能量传递效率和天线效率，揭示电化学、光化学控制天线分子与受体中心、受体中心与光致变色分子之间能量传递的机理。这对于进一步发展超分子光化学在可控的人工光捕获系统，智能发光材料、光电材料和生物材料等领域的应用具有重要的科学意义。

可控超分子系统的构筑及其在调控光化学反应、发展智能发光材料和光电材料方面的应用是当前研究的热点之一。本课题主要通过主-客体化学的方法将大环主体冠醚、葫芦脲、柱芳烃和具有光致变色特性的客体分子二芳基乙烯、二苯代乙烯等结合，构筑一系列具有可控的光捕获、光致电子转移、荧光传感、控制-释放、光降解等功能的超分子体系。通过核磁共振光谱仪、高分辨质谱仪、透射电镜、扫描电镜、动态光散射、紫外-可见吸收光谱、荧光发射光谱、密度泛函理论计算等手段研究该体系的形貌、组装模式和能量传递效率，揭示光或其他刺激响应的光捕获、控制-释放和光降解等作用机理，进一步应用于溶酶体靶向成像、二维码防伪、磷酸二氢根离子的识别与控制-释放、可控的光致电子转移、光降解等方面。这对于进一步发展超分子光化学在智能发光材料、光电材料和生物材料等领域的应用具有重要的科学意义。