【學術報告】Breaking?and?Reforming:?The?Key?to?Structurally?Ordered?Polymeric?Architectures?and?Recyclable?Materials?via?Dynamic?Covalent?Chemistry
日期：2024-05-13
閱讀：2964
主題：Breaking?and?Reforming:?The?Key?to?Structurally?Ordered?Polymeric?Architectures?and?Recyclable?Materials?via?Dynamic?Covalent?Chemistry
報告人：Wei?Zhang
時間：2023年5月13日（周一）10:00
地點：霞光樓200號
邀請人：顏徐州 研究員
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個人簡介
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 (UIUIC) with Prof. Jeffrey Moore in 2005. After conducting his postdoctoral research 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. Currently he is a full professor and serves 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 many awards/recognitions in his independent career, such as University New Inventor of the Year, 3M Non-Tenured Faculty Award, CAPA Distinguished Junior Faculty Award, NSF CAREER Award, Alfred P. Sloan Research Fellow, Provost’s Faculty Achievement Award, Guest Professorship at ETH Zürich, with the most recent election as a 2023 Senior Member of the National Academy of Inventors (NAI) and recipient of the 2022 American Chemical Society (ACS) Colorado Section Award and 2024 College Scholar Award.
報告簡介
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?unprecedented?single-crystal?DNA-like?helical?covalent?polymers?(HCPs),?2D/3D?open?frameworks,?and?closed-loop?recyclable?thermosets.
