高分子科学系列讲座第269讲,Dr.Xiaopeng Li,Self-Assembly of Multi-Layered Metallo-Supramolecules with Increasing Complexity

文章来源:    发布时间:2017-12-04
报告题目:Self-Assembly of Multi-Layered Metallo-Supramolecules with Increasing Complexity(NO.PSLAB269-PS2017-26)
报 告 人:Dr.Xiaopeng Li
单  位:University of South Florida,USA

  Self-assembly as a powerful bottom-up approach has been extensively used by nature to create complex biological systems. Synthetic supramolecular chemistry aims to use the principles of biological self-assembly to construct artificial nanostructures using molecular building blocks with desired functions and properties. The corresponding abiological assemblies, however, still suffered from a lack of complexity and thus were unable to reach the high degrees of functionality found in natural systems. With the goal of increasing the complexity of metallo-supramolecules, we designed and assembled a series of concentric, multi-layered architectures. With direct self-assembly strategy, we initiated our study through building different generations of 2D structures using terpyridine ligand. In the ligand preparation, pyrylium and pyridinium salts chemistry significantly facilitated the synthesis of multitopic ligands. Such ligand with multiple binding sites provided high geometric constraints to induce the formation of discrete structures. Replacing terpyridine by pyridine, we were able to assemble 3D sphere-in-sphere supramolecules with increasing complexity and stability. Finally, step-wise self-assembly was applied to advance terpyridine-based supramolecular chemistry into a new level of sophistication through constructing different generation of supramolecular fractals.

 Dr.Xiaopeng Li

李霄鹏,美国南佛罗里达大学(University of South Florida)化学系助理教授,博士生导师,2008年获得美国克利夫兰州立大学(Cleveland State University)化学博士学位后在阿克伦大学(University of Akron)从事博士后研究,2012年在德州州立大学(Texas State University)担任助理教授并开展独立研究,2016年转入南佛罗里达大学化学系担任助理教授。李霄鹏领导的课题组长期从事超分子结构设计、自组装的表征及官能化、超分子聚合物与功能材料方面的研究,近年来在Nat. Chem.、PNAS、J. Am. Chem. Soc.、Angew. Chem. Int. Ed.、Nano Lett.等国际学术刊物上发表论文80余篇,研究工作曾被Science、ACS Chemical& Engineering News、National Science Foundation (NSF)、Angew. Chem. Int. Ed.、JACS Select collection、Macromolecules等刊物和网站作为Hot Paper、Cover、Perspective以及Highlight报道。