A synthetic system mimicking the energy transfer and charge separation of natural photosynthesis

Devens Gust; Thomas Moore

doi:10.1016/0047-2670(85)87069-6

A synthetic system mimicking the energy transfer and charge separation of natural photosynthesis

Devens Gust, Thomas Moore

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Abstract

A synthetic molecular triad consisting of a porphyrin P linked to both a quinone Q and a carotenoid polyene C has been prepared as a mimic of natural photosynthesis for solar energy conversion purposes. Laser flash excitation of the porphyrin moiety yields a charge-separated state C^+·-P-Q^-· within 100 ps with a quantum yield of more than 0.25. This charge-separated state has a lifetime on the microsecond time scale in suitable solvents. The triad also models photosynthetic antenna function and photo-protection from singlet oxygen damage. The successful biomimicry of photo-synthetic charge separation is in part the result of multistep electron transfers which rapidly separate the charges and leave the system at high potential, but with a considerable barrier to recombination.

Original language	English (US)
Pages (from-to)	173-184
Number of pages	12
Journal	Journal of Photochemistry
Volume	29
Issue number	1-2
DOIs	https://doi.org/10.1016/0047-2670(85)87069-6
State	Published - May 1985

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title = "A synthetic system mimicking the energy transfer and charge separation of natural photosynthesis",

abstract = "A synthetic molecular triad consisting of a porphyrin P linked to both a quinone Q and a carotenoid polyene C has been prepared as a mimic of natural photosynthesis for solar energy conversion purposes. Laser flash excitation of the porphyrin moiety yields a charge-separated state C+·-P-Q-· within 100 ps with a quantum yield of more than 0.25. This charge-separated state has a lifetime on the microsecond time scale in suitable solvents. The triad also models photosynthetic antenna function and photo-protection from singlet oxygen damage. The successful biomimicry of photo-synthetic charge separation is in part the result of multistep electron transfers which rapidly separate the charges and leave the system at high potential, but with a considerable barrier to recombination.",

author = "Devens Gust and Thomas Moore",

note = "Funding Information: This material is based on work supported in part by the National Science Foundation (CHE-8209348 and INT-8212583), the Centre National de la Recherche Scientifique (3084), the North Atlantic Treaty Organization (RG.083.81) and the Cancer Research Campaign (U.K.). We thank our many coworkers [l] for their contributions.",

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T1 - A synthetic system mimicking the energy transfer and charge separation of natural photosynthesis

AU - Gust, Devens

AU - Moore, Thomas

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PY - 1985/5

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N2 - A synthetic molecular triad consisting of a porphyrin P linked to both a quinone Q and a carotenoid polyene C has been prepared as a mimic of natural photosynthesis for solar energy conversion purposes. Laser flash excitation of the porphyrin moiety yields a charge-separated state C+·-P-Q-· within 100 ps with a quantum yield of more than 0.25. This charge-separated state has a lifetime on the microsecond time scale in suitable solvents. The triad also models photosynthetic antenna function and photo-protection from singlet oxygen damage. The successful biomimicry of photo-synthetic charge separation is in part the result of multistep electron transfers which rapidly separate the charges and leave the system at high potential, but with a considerable barrier to recombination.

AB - A synthetic molecular triad consisting of a porphyrin P linked to both a quinone Q and a carotenoid polyene C has been prepared as a mimic of natural photosynthesis for solar energy conversion purposes. Laser flash excitation of the porphyrin moiety yields a charge-separated state C+·-P-Q-· within 100 ps with a quantum yield of more than 0.25. This charge-separated state has a lifetime on the microsecond time scale in suitable solvents. The triad also models photosynthetic antenna function and photo-protection from singlet oxygen damage. The successful biomimicry of photo-synthetic charge separation is in part the result of multistep electron transfers which rapidly separate the charges and leave the system at high potential, but with a considerable barrier to recombination.

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A synthetic system mimicking the energy transfer and charge separation of natural photosynthesis

Abstract

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