TY - JOUR
T1 - Ultrafast energy transfer and excited state coupling in an artificial photosynthetic antenna
AU - Maiuri, M.
AU - Snellenburg, J. J.
AU - Van Stokkum, I. H.M.
AU - Pillai, S.
AU - Wongcarter, K.
AU - Gust, D.
AU - Moore, T. A.
AU - Moore, A. L.
AU - Van Grondelle, R.
AU - Cerullo, G.
AU - Polli, D.
PY - 2013/11/21
Y1 - 2013/11/21
N2 - 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.
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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U2 - 10.1021/jp401073w
DO - 10.1021/jp401073w
M3 - Article
AN - SCOPUS:84888581579
VL - 117
SP - 14183
EP - 14190
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1520-6106
IS - 46
ER -