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Bioinspired Molecular Electrets: Synthetic “Proteome” for Engineering Charge-Transfer Systems

Valentine Vullev

Wednesday, February 22, 2017
  11 a.m.–Noon

Location: Chung Hall 205/206
  Parking Information

Category: Colloquium

Description: The ability to control charge transfer at molecular and nanometer scales represents the ultimate level of electronic mastery, and its impacts on electronic, energy and other applications cannot be overstated. As electrostatic analogues of magnets, electrets possess ordered electric dipoles that present key paradigms for directing transduction of electrons and holes. We undertake a bioinspired approach in the design of molecular electrets based on anthranilamides.[J. Phys. Chem. Lett. 2011, 2, 503–508] Similar to protein helices, the anthranilamides possess intrinsic dipoles originating from ordered amide and hydrogen bonds, i.e., they are composed of non-native anthranilamide (Aa) derivatives.[J. Org. Chem. 2013, 78, 1994-2004] Unlike proteins, however, the bioinspired molecular electrets have extended pi-conjugation along their backbones providing a means for efficient charge transfer. The anthranilic molecular electrets are polypeptides of non-native amino acids. This feature offers unexplored routes for bringing principles of proteomics into the de novo designs of electronic molecular systems and materials. In analogy, 22 proteogenic native alpha-amino acids, each with a different single side chain, are the building blocks of proteins with countless structural and functional characteristics yielding the amazing diversity of life on our planet. Therefore, a similar set of Aa residues with different electronic properties should prove most essential for the design of molecular electrets with a wide range of charge-transfer properties. Unlike the native amino acids, each of the Aa residues has two side chains that we selectively alter.....

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Open to: General Public
Admission: Free
Sponsor: Bioengineering Department

Contact Information:
Nancy Ford
(951) 827-5025