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Efficient light-harvesting antenna with a multi-porphyrin cascade

Efficient light-harvesting antenna with a multi-porphyrin cascade

Journal of the American Chemical Society 133(34): 13276-13279

ISSN/ISBN: 0002-7863

PMID: 21790118

DOI: 10.1021/ja2050343

A light-harvesting antenna 1 comprising three varieties of porphyrins, each having a different number of ethynyl groups at its meso positions, was designed and synthesized. Antenna 1 exhibits intense absorption throughout the visible region up to 700 nm. Steady-state and time-resolved fluorescence studies showed that singlet-excited-state energy transfer occurs from the peripheral porphyrins to the central porphyrin with >90% efficiency and rate constants on the order of 10(10) s(-1).

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Accession: 052909574

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