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


  • eng