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Quantum interferences among Dexter energy transfer pathways.

Publication ,  Journal Article
Bai, S; Zhang, P; Antoniou, P; Skourtis, SS; Beratan, DN
Published in: Faraday discussions
July 2019

Dexter energy transfer in chemical systems moves an exciton (i.e., an electron-hole pair) from a donor chromophore to an acceptor chromophore through a bridge by a combination of bonded and non-bonded interactions. The transition is enabled by both one-electron/one-particle and two-electron/two-particle interaction mechanisms. Assuming that there is no real intermediate state population of an electron, hole, or exciton in the bridge, the transport involves two states that are coupled non-adiabatically. As such, coherent quantum interferences arise among the Dexter energy coupling pathways. These interferences, while related to well understood interferences in single-electron transfer, are much richer because of their two particle nature: the transfer of a triplet exciton involves the net transfer of both an electron and a hole. Despite this additional complexity, simple rules can govern Dexter coupling pathway interferences in special cases. As in the case of single-electron transfer, identical parallel coupling pathways can be constructively interfering and may enhance the Dexter transfer rate. Because of the virtual particle combinatorics associated with two-particle superexchange, two parallel Dexter coupling routes may be expected to enhance Dexter couplings by more than a factor of two. We explore Dexter coupling pathway interferences in non-covalent assemblies, employing a method that enables the assessment of Dexter coupling pathway strengths and interferences, in the context of one-particle and two-particle coupling interactions.

Duke Scholars

Published In

Faraday discussions

DOI

EISSN

1364-5498

ISSN

1359-6640

Publication Date

July 2019

Volume

216

Issue

0

Start / End Page

301 / 318

Related Subject Headings

  • Chemical Physics
  • 34 Chemical sciences
  • 03 Chemical Sciences
 

Citation

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Bai, S., Zhang, P., Antoniou, P., Skourtis, S. S., & Beratan, D. N. (2019). Quantum interferences among Dexter energy transfer pathways. Faraday Discussions, 216(0), 301–318. https://doi.org/10.1039/c9fd00007k
Bai, Shuming, Peng Zhang, Panayiotis Antoniou, Spiros S. Skourtis, and David N. Beratan. “Quantum interferences among Dexter energy transfer pathways.Faraday Discussions 216, no. 0 (July 2019): 301–18. https://doi.org/10.1039/c9fd00007k.
Bai S, Zhang P, Antoniou P, Skourtis SS, Beratan DN. Quantum interferences among Dexter energy transfer pathways. Faraday discussions. 2019 Jul;216(0):301–18.
Bai, Shuming, et al. “Quantum interferences among Dexter energy transfer pathways.Faraday Discussions, vol. 216, no. 0, July 2019, pp. 301–18. Epmc, doi:10.1039/c9fd00007k.
Bai S, Zhang P, Antoniou P, Skourtis SS, Beratan DN. Quantum interferences among Dexter energy transfer pathways. Faraday discussions. 2019 Jul;216(0):301–318.
Journal cover image

Published In

Faraday discussions

DOI

EISSN

1364-5498

ISSN

1359-6640

Publication Date

July 2019

Volume

216

Issue

0

Start / End Page

301 / 318

Related Subject Headings

  • Chemical Physics
  • 34 Chemical sciences
  • 03 Chemical Sciences