期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 138, 期 10, 页码 3362-3370出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b12001
关键词
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资金
- Johns Hopkins University
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0004857]
- National Science Foundation [DMR-1407493]
- Harry and Cleio Greer Fellowship
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1407493] Funding Source: National Science Foundation
We report the synthesis, self-assembly, and electron transfer capabilities of peptide-based electron donor acceptor molecules and supramolecular nanostructures. These modified peptides contain pi-conjugated oligothiophene electron donor cores that are peripherally substituted with naphthalene diimide electron acceptors installed via imidation of site-specific lysine residues. These molecules self-assemble into one-dimensional nanostructures in aqueous media, as shown through steady-state absorption, photoluminescence, and circular dichroism spectra, as well as transmission electron microscopy. Excitation of the oligothiophene donor moieties results in electron transfer to the acceptor units, ultimately creating polar, charge-separated states that persist for over a nanosecond as observed with transient absorption spectroscopy. This study demonstrates how transient electric fields can be engineered into aqueous nanomaterials of biomedical relevance through external, temporally controlled photonic inputs.
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