Photochemical energy conversion in a helical oligoproline assembly.
Journal Article (Journal Article)
A general method is described for constructing a helical oligoproline assembly having a spatially ordered array of functional sites protruding from a proline-II helix. Three different redox-active carboxylic acids were coupled to the side chain of cis-4-amino-L-proline. These redox modules were incorporated through solid-phase peptide synthesis into a 13-residue helical oligoproline assembly bearing in linear array a phenothiazine electron donor, a tris(bipyridine)ruthenium(II) chromophore, and an anthraquinone electron acceptor. Upon transient 460-nm irradiation in acetonitrile, this peptide triad formed with 53% efficiency an excited state containing a phenothiazine radical cation and an anthraquinone radical anion. This light-induced redox-separated state had a lifetime of 175 ns and stored 1.65 eV of energy.
Full Text
Duke Authors
Cited Authors
- McCafferty, DG; Friesen, DA; Danielson, E; Wall, CG; Saderholm, MJ; Erickson, BW; Meyer, TJ
Published Date
- August 1996
Published In
Volume / Issue
- 93 / 16
Start / End Page
- 8200 - 8204
PubMed ID
- 8710847
Pubmed Central ID
- PMC38646
Electronic International Standard Serial Number (EISSN)
- 1091-6490
International Standard Serial Number (ISSN)
- 0027-8424
Digital Object Identifier (DOI)
- 10.1073/pnas.93.16.8200
Language
- eng