03/18/21 - 9:45 AM to 11:00 AM
Department Seminar: Professor Rebekka Klausen
Atomistic Control of Complex Polysilanes and Organic Polymers
Research in the Klausen Group applies the principles of target-oriented organic synthesis to polymeric materials. Examples include the cyclosilane building blocks, bifunctional inorganic monomers resembling fragments of the silicon lattice. Different cyclosilanes template distinct polymeric architectures, such that catalytic polymerization afforded controlled access to cyclic and linear polysilanes. Advances in building block design also provided fundamental organic polymers inaccessible from traditional feedstocks. BN 2-Vinylnaphthalene (BN2VN) is a masked polar monomer, with an aromatic core that imparts styrene-like reactivity. Postpolymerization functionalization converted the boron-based side chain to a hydroxyl group, resulting in the first syntheses of highly stereoregular polyvinyl alcohol and styrene-vinyl alcohol and methacrylate-vinyl alcohol copolymers. Achieving atomistic control of polymer structure ultimately provides materials with tailored properties.
The unifying theme of research in the Klausen research group is the application of rational organic synthesis to advance the frontiers of materials science. Through the atomic-level control provided by bottom-up synthesis, we precisely determine and control materials properties. In particular, researchers focus on carbon and silicon-based materials. Crystalline silicon, the preeminent solid state semiconductor, powers defining modern technologies like integrated circuits and solar cells. Inspired by the structure and properties of Group IV and III-V electronic materials, like silicon, graphene, and h-BN, they explore the synthetic chemistry and materials properties of carbon and silicon molecules, polymers, and other nanomaterials.
Professor Klausen joined the faculty at Johns Hopkins University (JHU) in July 2013. Prior to JHU, she earned her doctorate at Harvard University, and completed post-doctoral work at Columbia University.