Kinetic isotope effect of proton-coupled electron transfer in a hydrogen bonded phenol–pyrrolidino[60]fullerene

Janneke Ravensbergen; Chelsea L. Brown; Gary F. Moore; Raoul N. Frese; Rienk van Grondelle; Devens Gust; Thomas A. Moore; Ana L. Moore; John T. M. Kennis

doi:10.1039/C5PP00259A

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Kinetic isotope effect of proton-coupled electron transfer in a hydrogen bonded phenol–pyrrolidino[60]fullerene†

Janneke Ravensbergen,^a Chelsea L. Brown,^b Gary F. Moore,^b Raoul N. Frese,^a Rienk van Grondelle,^a Devens Gust,^b Thomas A. Moore,^b Ana L. Moore*^b and John T. M. Kennis*^a

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* Corresponding authors

^a Department of Physics and Astronomy, Faculty of Sciences, VU University, De Boelelaan 1081, Amsterdam, The Netherland
E-mail: j.t.m.kennis@vu.nl

^b Center for Bioenergy and Photosynthesis, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, USA
E-mail: Ana.Moore@asu.edu

Abstract

Proton-coupled electron transfer (PCET) plays a central role in photosynthesis and potentially in solar-to-fuel systems. We report a spectroscopy study on a phenol–pyrrolidino[60]fullerene. Quenching of the singlet excited state from 1 ns to 250 ps is assigned to PCET. A H/D exchange study reveals a kinetic isotope effect (KIE) of 3.0, consistent with a concerted PCET mechanism.

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Article information

DOI: https://doi.org/10.1039/C5PP00259A
Article type: Communication
Submitted: 07 Jul 2015
Accepted: 24 Oct 2015
First published: 27 Oct 2015
This article is Open Access

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Photochem. Photobiol. Sci., 2015,14, 2147-2150

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Kinetic isotope effect of proton-coupled electron transfer in a hydrogen bonded phenol–pyrrolidino[60]fullerene

J. Ravensbergen, C. L. Brown, G. F. Moore, R. N. Frese, R. van Grondelle, D. Gust, T. A. Moore, A. L. Moore and J. T. M. Kennis, Photochem. Photobiol. Sci., 2015, 14, 2147 DOI: 10.1039/C5PP00259A

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Photochemical & Photobiological Sciences

Kinetic isotope effect of proton-coupled electron transfer in a hydrogen bonded phenol–pyrrolidino[60]fullerene†

Abstract

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Kinetic isotope effect of proton-coupled electron transfer in a hydrogen bonded phenol–pyrrolidino[60]fullerene

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