报告题目：By-design Functional Polymeric Materials Enabled by Dynamic Covalent Chemistry

报 告 人：张伟 教授（科罗拉多大学波德分校）

邀 请 人：黄飞 教授

报告时间：2023年5月15日（星期一） 上午10:00-11:30

报告地点：北区发光材料与器件国家重点实验室502会议室

报告摘要：

By-design Functional Polymeric Materials Enabled by Dynamic

Covalent Chemistry

Wei Zhang

Department of Chemistry, University of Colorado Boulder, Boulder, CO 80309

e-mail: [email protected]

Dynamic covalent chemistry (DCvC) has proven to be highly effective toward the construction of well-defined molecular and polymeric architectures. The error-correction mechanism enabled by the reversible formation of dynamic covalent bonds leads to the formation of structurally ordered, thermodynamically favored species. One such example is the solvothermal synthesis of covalent organic frameworks (COFs) with periodic structural order and low defect density. The chemical compositions of such frameworks are usually well-defined and inter-monomer connectivity (covalent bonding) is robust. Bottom-up synthesis of covalently linked polymers through DCvC has many critical advantages, such as easy tunability of functional and structural properties in a controlled fashion through rational design of the precursors, formation of highly stable linkages, minimized structural defect, and possible access to sophisticated architectures that are hard to obtain otherwise. This talk will focus on our recent progress in the development of three types of DCvC, namely alkyne metathesis, spiroborate exchange and dynamic nucleophilic aromatic substitution (DySNAr). These powerful synthetic tools enabled the bottom-up design and synthesis of novel polymeric materials, such as an unprecedented single-crystal DNA-like helical covalent polymer (HCP), a novel carbon allotrope, -graphyne, and a closed-loop recyclable thermoset. 

个人简介：

Dr. Wei Zhang received his B.S. in Chemistry from Peking University in 2000, and his Ph.D. in Chemistry from the University of Illinois at Urbana-Champaign with Prof. Jeffrey Moore in 2005. After a postdoctoral research position at MIT with Prof. Timothy Swager, he started his independent career at the Department of Chemistry and Biochemistry at University of Colorado Boulder in 2008, and was promoted to Associate Professor in 2014 and to Full Professor in 2018. After serving as the Associate Chair of the Chemistry Department for three years, in 2022, he started his current role as the Department Chair. Dr. Zhang’s research is focused on utilizing dynamic covalent chemistry to develop novel organic and hybrid functional materials for a broad range of environmental and energy applications, such as carbon capture, light harvesting, energy storage, catalysis, and development of closed-loop recyclable thermosets and functional composites. He has received numerous awards/recognitions for his research at CU Boulder, such as Guest Professorship at ETH Zürich, Provost’s Faculty Achievement Award, Alfred P. Sloan Research Fellow, NSF CAREER Award, CAPA Distinguished Junior Faculty Award, 3M Non-Tenured Faculty Award, University New Inventor of the Year, with the most recent election as a 2023 Senior Member of the National Academy of Inventors (NAI) and receipt of the 2022 American Chemical Society (ACS) Colorado Section Award.