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Chemistry Colloquium: Yang Qin, University of New Mexico

Friday, June 14, 2019
10:15am – 11:30am

Storrs Campus
CHEM A-304

Chemistry Colloquium: "Design, Preparation,and Application of Organic/Inorganic Hybrid Materials"

Yang Qin, Department Chemistry and Chemical Biology, University of New Mexico, Host: Jie He

Abstract: In this presentation,I will describe our research efforts in developing bottom-up approaches toward organic/inorganic hybrid materials with tailor-designed chemical structures, controlled nanomorphologies and specifically targeted functions. First, a versatile toolbox employing supramolecular chemistry that is capable of precisely nanostructuring multi-component hybrid materials through self-assembly processes is described. Specifically, we show that well-defined conjugated polymer (CP)/fullerene core-shell composite nanofibers (NFs) can be obtained through cooperation of orthogonal non-covalent interactions including block copolymer (BCP) self-assembly, CP crystallization, fullerene aggregation and hydrogen bonding interactions. Organic photovoltaic (OPV) devices applying these NFs display improved controllability of morphologies at both macroscopic and microscopic levels, as well as enhanced efficiencies and stability, over their conventional bulk heterojunction (BHJ) counterparts. Secondly, our recent efforts in controlling nanomorphologies of metal-organic framework (MOF)-polymer composite membranes will be discussed. By using a templated growth mechanism, well-defined one-dimensional MOF nanotubes and nanorods could be obtained by simply varying the reactant concentrations. Intriguingly, when the template pore sizes are reduced to 30 nm, single crystal MOF nanowires with lengths up to 2 micrometers could be obtained that also displayed preferred lattice orientation. Such findings are potentially useful in gas and liquid separation applications.

Refreshments will be served at 10:15am. All are welcome.

Contact:

jie.he@uconn.edu

Chemistry Department (primary), College of Liberal Arts and Sciences, UConn Master Calendar

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