Thursday, 12 October, 2017
UT Host: Dr. Alexei Sokolov
Speaker: Dr. Brian Long, UTK Chemistry Professor --- Tenure Seminar
Title: “Accessing Tailored Polyolefins and Advanced Gas Separation Membranes via Coordination Polymerization Methods”
Abstract: Coordination-insertion based polymerization methods provide a multitude of opportunities for enhanced control over catalytic activity, selectivity, and reactivity. Through tailored catalyst development and macromolecular design, the Long Research Group leverages these advantages to synthesize unique and/or tailored polymeric structures for a variety of applications. In this talk, we will demonstrate the potential power of these coordination-insertion based polymerization methods through two studies. First, we will provide fundamental evidence that redox-active olefin polymerization catalysts can be effectively used to modulate polyolefin microstructure and copolymer composition via simple in situ changes in a catalyst's oxidation-state. Second, we will demonstrate that careful catalyst selection can enable access to a unique class of polymers that was previously believed to be inaccessible, and that those materials are extremely attractive as highly efficient gas separation membranes.
Biography: Brian began studying chemistry as an undergraduate at North Georgia College & State University under the direction of Professor Dan Thompson and as an REU student at Furman University under Professors John Wheeler and Noel A. P. Kane-Maguire. After completion of his B.S. degree, he attended the University of Texas at Austin for his doctoral studies with Professors C. Grant Willson and Christopher W. Bielawski. His research there involved the synthesis and application of traditional and nontraditional resist chemistries as well as nonlinear optical materials. After graduating in 2009, he moved to Ithaca, NY to begin his postdoctoral studies at Cornell University under the supervision of Professor Geoffrey W. Coates. While at Cornell, Brian focused on the design, synthesis and application of olefin polymerization catalysts. He has since returned to the southeast and is currently an assistant professor of chemistry at the University of Tennessee.
Web Cast: The seminar is not web cast.