High-efficiency energy transfer from carotenoids to a phthalocyanine in an artificial photosynthetic antenna

Ernesto Mariño-Ochoa, Rodrigo Palacios, Gerdenis Kodis, Alisdair N. Macpherson, Tomas Gillbro, John Devens Gust, Thomas A Moore, Ana L Moore

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Two carotenoid pigments have been linked as axial ligands to the central silicon atom of a phthalocyanine derivative, forming molecular triad 1. Laser flash studies on the femtosecond and picosecond time scales show that both the carotenoid S1 and S2 excited states act as donor states in 1, resulting in highly efficient singlet energy transfer from the carotenoids to the phthalocyanine. Triplet energy transfer in the opposite direction was also observed. In polar solvents efficient electron transfer from a carotenoid to the phthalocyanine excited singlet state yields a charge-separated state that recombines to the ground state of 1.

Original languageEnglish
Pages (from-to)116-121
Number of pages6
JournalPhotochemistry and Photobiology
Volume76
Issue number1
DOIs
Publication statusPublished - Jul 1 2002

Fingerprint

carotenoids
Energy Transfer
Carotenoids
Energy transfer
antennas
energy transfer
Antennas
Excited states
Silicon
pigments
Pigments
Ground state
excitation
flash
electron transfer
Lasers
Electrons
Ligands
Derivatives
Atoms

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry
  • Biophysics

Cite this

High-efficiency energy transfer from carotenoids to a phthalocyanine in an artificial photosynthetic antenna. / Mariño-Ochoa, Ernesto; Palacios, Rodrigo; Kodis, Gerdenis; Macpherson, Alisdair N.; Gillbro, Tomas; Gust, John Devens; Moore, Thomas A; Moore, Ana L.

In: Photochemistry and Photobiology, Vol. 76, No. 1, 01.07.2002, p. 116-121.

Research output: Contribution to journalArticle

Mariño-Ochoa, Ernesto ; Palacios, Rodrigo ; Kodis, Gerdenis ; Macpherson, Alisdair N. ; Gillbro, Tomas ; Gust, John Devens ; Moore, Thomas A ; Moore, Ana L. / High-efficiency energy transfer from carotenoids to a phthalocyanine in an artificial photosynthetic antenna. In: Photochemistry and Photobiology. 2002 ; Vol. 76, No. 1. pp. 116-121.
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