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1 July 2002 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, Devens Gust, Thomas A. Moore, Ana L. Moore
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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.

Ernesto Mariño-Ochoa, Rodrigo Palacios, Gerdenis Kodis, Alisdair N. Macpherson, Tomas Gillbro, Devens Gust, Thomas A. Moore, and Ana L. Moore "High-efficiency Energy Transfer from Carotenoids to a Phthalocyanine in an Artificial Photosynthetic Antenna," Photochemistry and Photobiology 76(1), 116-121, (1 July 2002). https://doi.org/10.1562/0031-8655(2002)076<0116:HEETFC>2.0.CO;2
Received: 11 April 2002; Accepted: 1 May 2002; Published: 1 July 2002
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