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Energy transfer processes in electronically coupled porphyrin hetero-dyads connected at the beta position

Journal Article


Abstract


  • Energy transfer in a series of hetero-dyads of zinc porphyrin and free-base porphyrin connected at the beta position by pi conjugated bridges has been determined. The dyads have been characterized and compared with the homo dyads, excellent models for the donor and the acceptor porphyrins in the electronically conjugated system. The homo dyads provide reliable parameters for the determination of the energy transfer rate calculated according to the Forster theory. This model was inadequate to account for the experimental findings and an electron exchange mechanism was shown to contribute. A favorable coplanar arrangement of the bridge and the tetrapyrroles facilitates the energy transfer process, which displays a very low distance dependence and an efficiency > 98%.

Authors


  •   Ventura, Barbara (external author)
  •   Barigelletti, Francesco (external author)
  •   Lodato, Fabio (external author)
  •   Officer, David L.
  •   Flamigni, Lucia (external author)

Publication Date


  • 2009

Citation


  • Ventura, B., Barigelletti, F., Lodato, F., Officer, D. L. & Flamigni, L. (2009). Energy transfer processes in electronically coupled porphyrin hetero-dyads connected at the beta position. Physical Chemistry Chemical Physics, 11 (13), 2166-2176.

Scopus Eid


  • 2-s2.0-63049124968

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/3362

Number Of Pages


  • 10

Start Page


  • 2166

End Page


  • 2176

Volume


  • 11

Issue


  • 13

Abstract


  • Energy transfer in a series of hetero-dyads of zinc porphyrin and free-base porphyrin connected at the beta position by pi conjugated bridges has been determined. The dyads have been characterized and compared with the homo dyads, excellent models for the donor and the acceptor porphyrins in the electronically conjugated system. The homo dyads provide reliable parameters for the determination of the energy transfer rate calculated according to the Forster theory. This model was inadequate to account for the experimental findings and an electron exchange mechanism was shown to contribute. A favorable coplanar arrangement of the bridge and the tetrapyrroles facilitates the energy transfer process, which displays a very low distance dependence and an efficiency > 98%.

Authors


  •   Ventura, Barbara (external author)
  •   Barigelletti, Francesco (external author)
  •   Lodato, Fabio (external author)
  •   Officer, David L.
  •   Flamigni, Lucia (external author)

Publication Date


  • 2009

Citation


  • Ventura, B., Barigelletti, F., Lodato, F., Officer, D. L. & Flamigni, L. (2009). Energy transfer processes in electronically coupled porphyrin hetero-dyads connected at the beta position. Physical Chemistry Chemical Physics, 11 (13), 2166-2176.

Scopus Eid


  • 2-s2.0-63049124968

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/3362

Number Of Pages


  • 10

Start Page


  • 2166

End Page


  • 2176

Volume


  • 11

Issue


  • 13