Warren, Jeffrey J. and Winkler, Jay R. and Gray, Harry B. (2013) Hopping maps for photosynthetic reaction centers. Coordination Chemistry Reviews, 257 (1). pp. 165-170. ISSN 0010-8545. PMCID PMC3530024. doi:10.1016/j.ccr.2012.07.002. https://resolver.caltech.edu/CaltechAUTHORS:20130201-110533889
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Abstract
Photosynthetic reaction centers (PRCs) employ multiple-step tunneling (hopping) to separate electrons and holes that ultimately drive the chemistry required for metabolism. We recently developed hopping maps that can be used to interpret the rates and energetics of electron/hole hopping in three-site (donor–intermediate–acceptor) tunneling reactions, including those in PRCs. Here we analyze several key ET reactions in PRCs, including forward ET in the L-branch, and hopping that could involve thermodynamically uphill intermediates in the M-branch, which is ET-inactive in vivo. We also explore charge recombination reactions, which could involve hopping. Our hopping maps support the view that electron flow in PRCs involves strong electronic coupling between cofactors and reorganization energies that are among the lowest in biology (≤0.4 eV).
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| Additional Information: | © 2012 Elsevier B.V. Received 16 May 2012; Received in revised form 3 July 2012; Accepted 4 July 2012; Available online 14 July 2012. Our work is supported by NIH (DK019038 to HBG and JRW; GM095037 to JJW), and an NSF Center for Chemical Innovation (Powering the Planet, CHE-0947829). | |||||||||
| Group: | CCI Solar Fuels | |||||||||
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| Subject Keywords: | Electron transfer; Multistep tunneling; Hopping maps; Photosynthesis; Bacterial photosynthetic reaction centers | |||||||||
| Issue or Number: | 1 | |||||||||
| PubMed Central ID: | PMC3530024 | |||||||||
| DOI: | 10.1016/j.ccr.2012.07.002 | |||||||||
| Record Number: | CaltechAUTHORS:20130201-110533889 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20130201-110533889 | |||||||||
| Official Citation: | Jeffrey J. Warren, Jay R. Winkler, Harry B. Gray, Hopping maps for photosynthetic reaction centers, Coordination Chemistry Reviews, Volume 257, Issue 1, 1 January 2013, Pages 165-170, ISSN 0010-8545, 10.1016/j.ccr.2012.07.002. | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 36741 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 05 Feb 2013 23:25 | |||||||||
| Last Modified: | 09 Nov 2021 23:24 |
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