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Issue 2, 2015
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Energy transfer within responsive pi-conjugated coassembled peptide-based nanostructures in aqueous environments

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Abstract

Steady-state and time-resolved photophysical measurements demonstrate energy transfer within π-conjugated peptide nanostructures composed of oligo-(p-phenylenevinylene)-based donor units and quaterthiophene-based acceptor units in completely aqueous environments. These peptide-based assemblies encourage energy migration along the stacking axis, thus resulting in the quenching of donor emission peaks along with the development of new spectral features reminiscent of acceptor emission. These spectral changes were observed even at minute amounts of the acceptor (starting at 1 mol%), suggesting that exciton migration is involved in energy transport and supporting a funnel-like energy transduction mechanism. The reversibility of nanostructure formation and the associated photophysical responses under different conditions (pH, temperature) were also studied. This unique material design incorporates two different semiconducting units coassembled within peptide nanostructures and offers a new platform for the engineering of energy migration through bioelectronic materials in aqueous environments.

Graphical abstract: Energy transfer within responsive pi-conjugated coassembled peptide-based nanostructures in aqueous environments

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Supplementary files

Article information


Submitted
11 Oct 2014
Accepted
30 Nov 2014
First published
05 Dec 2014

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2015,6, 1474-1484
Article type
Edge Article

Energy transfer within responsive pi-conjugated coassembled peptide-based nanostructures in aqueous environments

H. A. M. Ardoña and J. D. Tovar, Chem. Sci., 2015, 6, 1474
DOI: 10.1039/C4SC03122A

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    [Original citation] - Published by The Royal Society of Chemistry.

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