Ultrafast energy transfer and excited state coupling in an artificial photosynthetic antenna

M. Maiuri; J. J. Snellenburg; I. H.M. Van Stokkum; S. Pillai; K. Wongcarter; D. Gust; T. A. Moore; A. L. Moore; R. Van Grondelle; G. Cerullo; D. Polli

doi:10.1021/jp401073w

Ultrafast energy transfer and excited state coupling in an artificial photosynthetic antenna

M. Maiuri, J. J. Snellenburg, I. H.M. Van Stokkum, S. Pillai, K. Wongcarter, D. Gust, T. A. Moore, A. L. Moore, R. Van Grondelle, G. Cerullo, D. Polli

Arizona State University

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

We have studied the energy transfer dynamics in an artificial light-harvesting dyad composed of a phthalocyanine (Pc) covalently linked to a carotenoid (Car). The combination of high temporal resolution transient absorption spectroscopy with global and target analysis allowed us to quantify the efficiency of the energy transfer from the S₂ excited state of the Car to the Pc at 37%, close to values observed in some natural light-harvesting complexes. In addition, following selective excitation of the Pc, we have identified the spectral signatures of the S₁ excited state of the Car which appear within the ≈30 fs time resolution of our measurement. This strongly indicates excited state coupling between the S ₁ state of Car and the Q_x state of Pc, with important implications for the regulation of photosynthetic activity.

Original language	English
Pages (from-to)	14183-14190
Number of pages	8
Journal	Journal of Physical Chemistry B
Volume	117
Issue number	46
DOIs	https://doi.org/10.1021/jp401073w
Publication status	Published - Nov 21 2013

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ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

Cite this

Maiuri, M., Snellenburg, J. J., Van Stokkum, I. H. M., Pillai, S., Wongcarter, K., Gust, D., Moore, T. A., Moore, A. L., Van Grondelle, R., Cerullo, G., & Polli, D. (2013). Ultrafast energy transfer and excited state coupling in an artificial photosynthetic antenna. Journal of Physical Chemistry B, 117(46), 14183-14190. https://doi.org/10.1021/jp401073w

Ultrafast energy transfer and excited state coupling in an artificial photosynthetic antenna. / Maiuri, M.; Snellenburg, J. J.; Van Stokkum, I. H.M.; Pillai, S.; Wongcarter, K.; Gust, D.; Moore, T. A.; Moore, A. L.; Van Grondelle, R.; Cerullo, G.; Polli, D.

In: Journal of Physical Chemistry B, Vol. 117, No. 46, 21.11.2013, p. 14183-14190.

Research output: Contribution to journal › Article

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AU - Gust, D.

AU - Moore, T. A.

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AB - We have studied the energy transfer dynamics in an artificial light-harvesting dyad composed of a phthalocyanine (Pc) covalently linked to a carotenoid (Car). The combination of high temporal resolution transient absorption spectroscopy with global and target analysis allowed us to quantify the efficiency of the energy transfer from the S2 excited state of the Car to the Pc at 37%, close to values observed in some natural light-harvesting complexes. In addition, following selective excitation of the Pc, we have identified the spectral signatures of the S1 excited state of the Car which appear within the ≈30 fs time resolution of our measurement. This strongly indicates excited state coupling between the S 1 state of Car and the Qx state of Pc, with important implications for the regulation of photosynthetic activity.

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