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【11th.Dec.】Self-Assembly of Multi-Layered Metallo-Supramolecules with Increasing Complexity

2017-12-11

 

Topic: Self-Assembly of Multi-Layered Metallo-Supramolecules with Increasing Complexity
Speaker: Prof. Xiaopeng Li (李霄鹏教授)Department of Chemistry, University of South Florida, Tampa, Florida 33620, USA
Time: Monday, December 11, 2017, 10:30 AM
Location: Lecture Hall B410
Inviter: Prof. Shaodong Zhang (张绍东特别研究员)

摘要

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 selfassembly 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.

 


个人简历
李霄鹏博士,Assistant Professor, 现任职于University of South Florida。2012年9月到2016年7月间,李博士于 Texas State University 任 Assistant Professor。李博士于2004 年毕业于郑州大学; 同年赴美国 Cleveland State University 留学, 师从Baochuan Guo 教授,于2008年12月获得该校博士学位;在2009年2月至2012年8月期间,李博士在 University of Akron 的 Chrys Wesdemiotis 教授指导下,从事博士后研究。自2012年9月独立开展科研工作以来,李博士在包括 Nat. Chem., Nat. Commun.,ACS Cent. Sci., J. Am. Chem. Soc., Angew.Chem. Int. Ed., Nano Lett., Chem. Sci.等国际一流学术期刊上发表学术论文近60篇,受邀学术报告20余次,文章被引用超过2700次,H-index 达34。



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