Photoinduced Electron Transfer Reactions in Zeolite-Based Donor-Acceptor and Donor-Donor-Acceptor Diads and Triads

Edward H. Yonemoto, Thomas E. Mallouk, Yeong Kim, Jim O. Wallin, Ben A. Shoulders, Russell H. Schmehl, Benny R. Richardson, James F. Haw

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

Electron transfer (ET) reactions in a series of donor-acceptor (D-A) molecules (2, 2ʹ-bipyridine)2Ru(4-CH3-2,ʹ-bipyridine-4ʹ)-(CH2)n-(4, 4ʹ-bipyridinium-CH3)4+ (n = 2-5, 7, 8) exchanged onto the surface of large-pore zeolites (Y, L, and mordenite) were studied in suspensions by nanosecond flash photolysis/transient diffuse reflectance techniques. From solid state CP-MAS spectra of 13C-labeled compounds, it was established that the D-A molecules occupy surface sites in which the A end is occluded by the zeolite channels, while the size-excluded D end is exposed. The rate of forward ET reactions from photoexcited D to A decreases with increasing spacer length. The back ET reaction is approximately 105 times slower for D—A diads on the zeolite surface than in solution. Slowing of the back ET rate and a maximum in charge separation quantum yields at n = 4, 5 are attributed to lateral charge transfer diffusion on the zeolite surface to form an intermolecular charge-separated state. Addition of size-or charge-excluded electron donors (Dʹ) to the suspension gives a Dʹ-D-A triad, in which the initial ET reaction can be between D and A, or Dʹ and D, depending on energetics and the spacer length n. In both cases a long-lived charge-separated state is formed between Dʹ and A.

Original languageEnglish (US)
Pages (from-to)10557-10563
Number of pages7
JournalJournal of the American Chemical Society
Volume116
Issue number23
DOIs
StatePublished - Nov 1 1994

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Zeolites
Electrons
Suspensions
Molecules
Photolysis
Quantum yield
Charge transfer

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Yonemoto, E. H., Mallouk, T. E., Kim, Y., Wallin, J. O., Shoulders, B. A., Schmehl, R. H., ... Haw, J. F. (1994). Photoinduced Electron Transfer Reactions in Zeolite-Based Donor-Acceptor and Donor-Donor-Acceptor Diads and Triads. Journal of the American Chemical Society, 116(23), 10557-10563. https://doi.org/10.1021/ja00102a024
Yonemoto, Edward H. ; Mallouk, Thomas E. ; Kim, Yeong ; Wallin, Jim O. ; Shoulders, Ben A. ; Schmehl, Russell H. ; Richardson, Benny R. ; Haw, James F. / Photoinduced Electron Transfer Reactions in Zeolite-Based Donor-Acceptor and Donor-Donor-Acceptor Diads and Triads. In: Journal of the American Chemical Society. 1994 ; Vol. 116, No. 23. pp. 10557-10563.
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Yonemoto, EH, Mallouk, TE, Kim, Y, Wallin, JO, Shoulders, BA, Schmehl, RH, Richardson, BR & Haw, JF 1994, 'Photoinduced Electron Transfer Reactions in Zeolite-Based Donor-Acceptor and Donor-Donor-Acceptor Diads and Triads', Journal of the American Chemical Society, vol. 116, no. 23, pp. 10557-10563. https://doi.org/10.1021/ja00102a024

Photoinduced Electron Transfer Reactions in Zeolite-Based Donor-Acceptor and Donor-Donor-Acceptor Diads and Triads. / Yonemoto, Edward H.; Mallouk, Thomas E.; Kim, Yeong; Wallin, Jim O.; Shoulders, Ben A.; Schmehl, Russell H.; Richardson, Benny R.; Haw, James F.

In: Journal of the American Chemical Society, Vol. 116, No. 23, 01.11.1994, p. 10557-10563.

Research output: Contribution to journalArticle

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AU - Yonemoto, Edward H.

AU - Mallouk, Thomas E.

AU - Kim, Yeong

AU - Wallin, Jim O.

AU - Shoulders, Ben A.

AU - Schmehl, Russell H.

AU - Richardson, Benny R.

AU - Haw, James F.

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