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Self-Assembly of a Structurally Defined Chiro-Optical Peptide-Oligothiophene Hybrid Material
Not Found:Linkoping Univ, Dept Phys Chem and Biol, Div Mol Phys, Lab Mol Mat, S-58183 Linkoping, Sweden; Linkoping Univ, Dept Phys, Div Chem, Chem and Biol, S-58183 Linkoping, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Molecular Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-7001-9415
Linköping University, Department of Physics, Chemistry and Biology, Molecular Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Molecular Physics. Linköping University, Faculty of Science & Engineering.
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2018 (English)In: ACS OMEGA, ISSN 2470-1343, Vol. 3, no 11, p. 15066-15075Article in journal (Refereed) Published
Abstract [en]

Conducting polymers are routinely used in optoelectronic biomaterials, but large polymer polydispersity and poor aqueous compatibility complicate integration with biomolecular templates and development of discrete and defined supramolecular complexes. Herein, we report on a chiro-optical hybrid material generated by the self-assembly of an anionic peptide and a chemically defined cationic pentameric thiophene in aqueous environment. The peptide acts as a stereochemical template for the thiophene and adopts an a-helical conformation upon association, inducing optical activity in the thiophene r-n * transition region. Theoretical calculations confirm the experimentally observed induced structural changes and indicate the importance of electrostatic interactions in the complex. The association process is also probed at the substrate-solvent interface using peptide-functionalized gold nanoparticles, indicating that the peptide can also act as a scaffold when immobilized, resulting in structurally well-defined supramolecular complexes. The hybrid complex could rapidly be assembled, and the kinetics of the formation could be monitored by utilizing the local surface plasmon resonance originating from the gold nanoparticles. We foresee that these findings will aid in designing novel hybrid materials and provide a possible route for the development of functional optoelectronic interfaces for both biomaterials and energy harvesting applications.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 3, no 11, p. 15066-15075
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Physical Chemistry
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URN: urn:nbn:se:liu:diva-153701DOI: 10.1021/acsomega.8b02153ISI: 000451992500053OAI: oai:DiVA.org:liu-153701DiVA, id: diva2:1276202
Note

Funding Agencies|Knut and Alice Wallenberg Foundation; Swedish Foundation for Strategic Research; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]

Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-03-25

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Nilsson, Peter

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