Quantum Coherence Enhances Electron Transfer Rates to Two Equivalent Electron Acceptors

Brian T. Phelan; Jinyuan Zhang; Guan Jhih Huang; Yi-Lin Wu; Mehdi Zarea; Ryan M. Young; Michael R. Wasielewski

doi:10.1021/jacs.9b06166

Quantum Coherence Enhances Electron Transfer Rates to Two Equivalent Electron Acceptors

Brian T. Phelan, Jinyuan Zhang, Guan Jhih Huang, Yi-Lin Wu, Mehdi Zarea, Ryan M. Young^*, Michael R. Wasielewski

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

When a molecular electron donor interacts with multiple electron acceptors, quantum coherence can enhance the electron transfer (ET) rate. Here we report photodriven ET rates in a pair of donor-acceptor (D-A) compounds that link one anthracene (An) donor to one or two equivalent 1,4-benzoquinone (BQ) acceptors. Subpicosecond ET from the lowest excited singlet state of An to two BQs is about 2.4 times faster than ET to one BQ at room temperature, but about 5 times faster at cryogenic temperatures. This factor of 2 increase results from a transition from ET to one of two acceptors at room temperature to ET to a superposition state of the two acceptors with correlated system-bath fluctuations at low temperature.

Original language	English (US)
Pages (from-to)	12236-12239
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	141
Issue number	31
DOIs	https://doi.org/10.1021/jacs.9b06166
State	Published - Aug 7 2019

Funding

We thank Dr. Aritra Mandal for helpful discussions and Jonathan Schultz for assistance with the temperature dependence measurements. This work was supported by the National Science Foundation under grant number DMR-1710104.

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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@article{e710fcb6099649bbb414486dc9eaf676,

title = "Quantum Coherence Enhances Electron Transfer Rates to Two Equivalent Electron Acceptors",

abstract = "When a molecular electron donor interacts with multiple electron acceptors, quantum coherence can enhance the electron transfer (ET) rate. Here we report photodriven ET rates in a pair of donor-acceptor (D-A) compounds that link one anthracene (An) donor to one or two equivalent 1,4-benzoquinone (BQ) acceptors. Subpicosecond ET from the lowest excited singlet state of An to two BQs is about 2.4 times faster than ET to one BQ at room temperature, but about 5 times faster at cryogenic temperatures. This factor of 2 increase results from a transition from ET to one of two acceptors at room temperature to ET to a superposition state of the two acceptors with correlated system-bath fluctuations at low temperature.",

author = "Phelan, {Brian T.} and Jinyuan Zhang and Huang, {Guan Jhih} and Yi-Lin Wu and Mehdi Zarea and Young, {Ryan M.} and Wasielewski, {Michael R.}",

note = "Funding Information: We thank Dr. Aritra Mandal for helpful discussions and Jonathan Schultz for assistance with the temperature dependence measurements. This work was supported by the National Science Foundation under grant number DMR-1710104. Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

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AU - Phelan, Brian T.

AU - Zhang, Jinyuan

AU - Huang, Guan Jhih

AU - Wu, Yi-Lin

AU - Zarea, Mehdi

AU - Young, Ryan M.

AU - Wasielewski, Michael R.

N1 - Funding Information: We thank Dr. Aritra Mandal for helpful discussions and Jonathan Schultz for assistance with the temperature dependence measurements. This work was supported by the National Science Foundation under grant number DMR-1710104. Publisher Copyright: © 2019 American Chemical Society.

PY - 2019/8/7

Y1 - 2019/8/7

N2 - When a molecular electron donor interacts with multiple electron acceptors, quantum coherence can enhance the electron transfer (ET) rate. Here we report photodriven ET rates in a pair of donor-acceptor (D-A) compounds that link one anthracene (An) donor to one or two equivalent 1,4-benzoquinone (BQ) acceptors. Subpicosecond ET from the lowest excited singlet state of An to two BQs is about 2.4 times faster than ET to one BQ at room temperature, but about 5 times faster at cryogenic temperatures. This factor of 2 increase results from a transition from ET to one of two acceptors at room temperature to ET to a superposition state of the two acceptors with correlated system-bath fluctuations at low temperature.

AB - When a molecular electron donor interacts with multiple electron acceptors, quantum coherence can enhance the electron transfer (ET) rate. Here we report photodriven ET rates in a pair of donor-acceptor (D-A) compounds that link one anthracene (An) donor to one or two equivalent 1,4-benzoquinone (BQ) acceptors. Subpicosecond ET from the lowest excited singlet state of An to two BQs is about 2.4 times faster than ET to one BQ at room temperature, but about 5 times faster at cryogenic temperatures. This factor of 2 increase results from a transition from ET to one of two acceptors at room temperature to ET to a superposition state of the two acceptors with correlated system-bath fluctuations at low temperature.

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Quantum Coherence Enhances Electron Transfer Rates to Two Equivalent Electron Acceptors

Abstract

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