UMass Boston News

Chemistry Colloquium: Professor Samuel Thomas, Tufts University

Event Date: November 20, 2013 - 11 a.m.
Location: Science Center, Chemistry Conference Room (Science S01-0089)

University of Massachusetts Boston

Department of Chemistry

Chemistry Colloquium

Controlling Polymeric Thin Films with Light

Professor Samuel W. Thomas III

Department of Chemistry, Tufts University

Wednesday, November 20, 2013 | 12:00 pm

Chemistry Conference Room (Science S01-0089)

This talk will describe several new approaches to controlling the properties of solid-state organic materials with light. We have developed conjugated polymer (CP)-based materials that show a photoluminescent response to singlet oxygen (1O2). Thin films of these polymers also respond to irradiation of microspheres with protein-bound sensitizers, a solution to the problem of protein-conjugated polymer non-specific interactions in biosensing. The talk will also summarize two approaches to controlling non-covalent interactions between polymers using light. First, photoinduced charge-shifting polymers yield photoresponsive polyelectrolyte multilayer films. Second, polythiophenes with photocleavable solubilizing side-chains undergo aggregation and resist dissolution upon irradiation with UV light.

For disability-related accommodations, including dietary accommodations, please visit two weeks prior to the event.