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The 2017 Seventeenth Annual UMM Undergraduate Research Symposium (URS) celebrates student scholarly achievement and creative activities. Students from all disciplines participate in the URS. Types of presentations include posters, oral presentations, and short or abbreviated theatrical, dance, or musical performances. 

Presentations are accompanied by discussions and multimedia.

 


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Saturday, April 22 • 10:00am - 12:00pm
Direct Heteroarylation Synthesis of a Novel Benzodithiophene Organic Polymer

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Organic homopolymers are large carbon based compounds composed of repeating units called monomers. A common monomeric unit is benzodithiophene (BDT). BDT homopolymers have shown great potential as semiconductor materials for organic photovoltaic solar cells and other organic electronics. Unfortunately, conventional polymer synthesis produces toxic by-products. Direct heteroarylation polymerization is far more environmentally friendly as it requires reduced monomer preparation and produces no toxic by-products; however, direct heteroarylation of benzodithiophene polymers has not yet been reported. Herein, we report the successful synthesis of high molecular weight, defect free polymers via direct heteroarylation polymerization. Synthesis was performed on a benzodithiophene monomer using a palladium catalyst with two different chemical additives, and an inorganic base in an organic solvent. Polymer weight, light absorption, and chemical structure were analyzed using gel-permeation chromatography, UV-Vis spectroscopy, and 1H NMR spectroscopy respectively. Direct heteroarylation produced significantly higher molecular weight polymers in a comparable yield to conventional synthetic methods. These results show that direct arylation synthesis is an effective green alternative for conventional polymerization of BDT organic polymers.

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Saturday April 22, 2017 10:00am - 12:00pm
Student Center, Oyate Hall 600 E 4th St., Morris MN 56267