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Photoinduced Electron Transfer in Amino Acid Assemblies

Publication ,  Journal Article
Mecklenburg, SL; Peek, BM; Schoonover, JR; McCafferty, DG; Wall, CG; Erickson, BW; Meyer, TJ
Published in: Journal of the American Chemical Society
June 1, 1993

The preparation and photophysical characterization of a series of redox-active lysines and related model compounds based on polypyridyl ruthenium complexes are described. Donor-chromophore-acceptor triad 1, [PTZpn-Lys(RuIIb2m)2+-NH-prPQ2+] (PF6−)4 (see below), was prepared by assembly of a modified ruthenium bipyridyl chromophore (RuIIb2m, where b = 2,2′-bipyridine, m = 4′-methyl-2,2′-bipyridyl-4′-carbonyl), an electron donor (phenothiazine, PTZ), and an electron acceptor (paraquat, PQ2+) on a lysine (Lys) scaffold utilizing amide bonds. This derivatized amino acid exhibited efficient (>95%) quenching of the ruthenium metal-to-ligand charge-transfer (MLCT) excited state upon irradiation with a 420-nm laser pulse in CH3CN. The resulting redox-separated state, [(PTZpn·+)-Lys(RuII,b2m)2+-NH-(prPQ·+)], stored 1.17 eV and lived for 108 ns (k = 9.26 × 106 s−1) as observed by transient absorption spectroscopy. Also studied was a series of related model systems that included model chromophores, simple chromophore-quencher dyads linked by amide bonds, and chromophore-quencher dyads based on lysine. An account of the kinetic behavior of these systems including triad 1 and a discussion of factors that influence the lifetime of the redox-separated states, their efficiency of formation, and their energy storage ability are presented. © 1993, American Chemical Society. All rights reserved.

Duke Scholars

Published In

Journal of the American Chemical Society

DOI

EISSN

1520-5126

ISSN

0002-7863

Publication Date

June 1, 1993

Volume

115

Issue

13

Start / End Page

5479 / 5495

Related Subject Headings

  • General Chemistry
  • 03 Chemical Sciences
 

Citation

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Mecklenburg, S. L., Peek, B. M., Schoonover, J. R., McCafferty, D. G., Wall, C. G., Erickson, B. W., & Meyer, T. J. (1993). Photoinduced Electron Transfer in Amino Acid Assemblies. Journal of the American Chemical Society, 115(13), 5479–5495. https://doi.org/10.1021/ja00066a017
Mecklenburg, S. L., B. M. Peek, J. R. Schoonover, D. G. McCafferty, C. G. Wall, B. W. Erickson, and T. J. Meyer. “Photoinduced Electron Transfer in Amino Acid Assemblies.” Journal of the American Chemical Society 115, no. 13 (June 1, 1993): 5479–95. https://doi.org/10.1021/ja00066a017.
Mecklenburg SL, Peek BM, Schoonover JR, McCafferty DG, Wall CG, Erickson BW, et al. Photoinduced Electron Transfer in Amino Acid Assemblies. Journal of the American Chemical Society. 1993 Jun 1;115(13):5479–95.
Mecklenburg, S. L., et al. “Photoinduced Electron Transfer in Amino Acid Assemblies.” Journal of the American Chemical Society, vol. 115, no. 13, June 1993, pp. 5479–95. Scopus, doi:10.1021/ja00066a017.
Mecklenburg SL, Peek BM, Schoonover JR, McCafferty DG, Wall CG, Erickson BW, Meyer TJ. Photoinduced Electron Transfer in Amino Acid Assemblies. Journal of the American Chemical Society. 1993 Jun 1;115(13):5479–5495.
Journal cover image

Published In

Journal of the American Chemical Society

DOI

EISSN

1520-5126

ISSN

0002-7863

Publication Date

June 1, 1993

Volume

115

Issue

13

Start / End Page

5479 / 5495

Related Subject Headings

  • General Chemistry
  • 03 Chemical Sciences