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UID:20250626T152456EDT-7173SFjnE9@132.216.98.100
DTSTAMP:20250626T192456Z
DESCRIPTION:Abstract:\n\nSynthetic chemists have developed robust methods t
 o synthesize discrete molecules\, linear and branched polymers\, and disor
 dered cross-linked networks. However\, two-dimensional (2D) polymers prepa
 red from designed monomers have been long missing from these capabilities\
 , both as objects of chemical synthesis and in nature.1 Recently\, new pol
 ymerization strategies and characterization methods have enabled the unamb
 iguous realization of 2D\, covalently linked macromolecular sheets. In the
  early realization of this synthetic challenge\, polymerization conditions
  were identified empirically by screening polymerization conditions throug
 h powder x-ray diffraction analysis of the insoluble powder products\, whi
 ch provided polycrystalline samples with crystalline domains with average 
 in-plane dimensions of 25-50 nm. More recently\, we have developed tools t
 o study these polymerizations experimentally and computationally\, which h
 as given rise to the first controlled two-dimensional polymerizations\, al
 ong with materials of improved quality (Figure). I will present these appr
 oaches and the properties of high-quality 2D polymers that are now startin
 g to emerge.\n\n \n\nBio:\n\nWilliam Dichtel received a B.S. degree in Che
 mistry from MIT\, where he performed research with Prof. Tim Swager. Dicht
 el obtained his Ph.D. degree from UC-Berkeley under Prof. Jean M. J. Fréch
 et. He was a joint postdoctoral researcher with Prof. Fraser Stoddart\, UC
 LA\, and Prof. James Heath\, Caltech. He began his independent academic ca
 reer at Cornell University in 2008 and was promoted to Associate Professor
  in 2014. In 2016\, he moved to Northwestern University as the Robert L. L
 etsinger Professor of Chemistry. The unifying theme of Dichtel’s research 
 is the use of organic synthesis and noncovalent assembly to control the st
 ructure and reactivity of molecules\, materials\, and interfaces across ch
 emical environments. His research has expanded the study of polymerization
  processes into the second and third dimensions in an emerging class of po
 lymers known as covalent organic frameworks (COFs)\, porous polymers for w
 ater purification\, and new approaches to polymer recycling.\n\n \n\nDicht
 el’s research has been recognized nationally and internationally. Dichtel 
 has received a MacArthur Fellowship\, a Guggenheim Fellowship\, the Leo He
 ndrik Baekeland Award of the North Jersey Section of the ACS\, and was nam
 ed the 2020 National Laureate in Chemistry by the Blavatnik Awards for You
 ng Scientists.\n
DTSTART:20230131T180000Z
DTEND:20230131T193000Z
LOCATION:Room 10\, Maass Chemistry Building\, CA\, QC\, Montreal\, H3A 0B8\
 , 801 rue Sherbrooke Ouest
SUMMARY:Chemical Society Seminar: William Dichtel - Two Dimensional Polymer
 s and Polymerizations
URL:/chemistry/channels/event/chemical-society-seminar
 -william-dichtel-two-dimensional-polymers-and-polymerizations-340127
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