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Article: Ultrafast Two-Electron Transfer in a CdS Quantum Dot-Extended-Viologen Cyclophane Complex

TitleUltrafast Two-Electron Transfer in a CdS Quantum Dot-Extended-Viologen Cyclophane Complex
Authors
Issue Date2016
Citation
Journal of the American Chemical Society, 2016, v. 138, n. 19, p. 6163-6170 How to Cite?
AbstractTime-resolved optical spectroscopies reveal multielectron transfer from the biexcitonic state of a CdS quantum dot to an adsorbed tetracationic compound cyclobis(4,4′-(1,4-phenylene) bipyridin-1-ium-1,4-phenylene-bis(methylene)) (ExBox4+) to form both the ExBox3+• and the doubly reduced ExBox2(+•) states from a single laser pulse. Electron transfer in the single-exciton regime occurs in 1 ps. At higher excitation powers the second electron transfer takes ∼5 ps, which leads to a mixture of redox states of the acceptor ligand. The doubly reduced ExBox2(+•) state has a lifetime of ∼10 ns, while CdS+•:ExBox3+• recombines with multiple time constants, the longest of which is ∼300 μs. The long-lived charge separation and ability to accumulate multiple charges on ExBox4+ demonstrate the potential of the CdS:ExBox4+ complex to serve as a platform for two-electron photocatalysis.
Persistent Identifierhttp://hdl.handle.net/10722/333177
ISSN
2023 Impact Factor: 14.4
2023 SCImago Journal Rankings: 5.489
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYoung, Ryan M.-
dc.contributor.authorJensen, Stephen C.-
dc.contributor.authorEdme, Kedy-
dc.contributor.authorWu, Yilei-
dc.contributor.authorKrzyaniak, Matthew D.-
dc.contributor.authorVermeulen, Nicolaas A.-
dc.contributor.authorDale, Edward J.-
dc.contributor.authorStoddart, J. Fraser-
dc.contributor.authorWeiss, Emily A.-
dc.contributor.authorWasielewski, Michael R.-
dc.contributor.authorCo, Dick T.-
dc.date.accessioned2023-10-06T05:17:18Z-
dc.date.available2023-10-06T05:17:18Z-
dc.date.issued2016-
dc.identifier.citationJournal of the American Chemical Society, 2016, v. 138, n. 19, p. 6163-6170-
dc.identifier.issn0002-7863-
dc.identifier.urihttp://hdl.handle.net/10722/333177-
dc.description.abstractTime-resolved optical spectroscopies reveal multielectron transfer from the biexcitonic state of a CdS quantum dot to an adsorbed tetracationic compound cyclobis(4,4′-(1,4-phenylene) bipyridin-1-ium-1,4-phenylene-bis(methylene)) (ExBox4+) to form both the ExBox3+• and the doubly reduced ExBox2(+•) states from a single laser pulse. Electron transfer in the single-exciton regime occurs in 1 ps. At higher excitation powers the second electron transfer takes ∼5 ps, which leads to a mixture of redox states of the acceptor ligand. The doubly reduced ExBox2(+•) state has a lifetime of ∼10 ns, while CdS+•:ExBox3+• recombines with multiple time constants, the longest of which is ∼300 μs. The long-lived charge separation and ability to accumulate multiple charges on ExBox4+ demonstrate the potential of the CdS:ExBox4+ complex to serve as a platform for two-electron photocatalysis.-
dc.languageeng-
dc.relation.ispartofJournal of the American Chemical Society-
dc.titleUltrafast Two-Electron Transfer in a CdS Quantum Dot-Extended-Viologen Cyclophane Complex-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/jacs.5b13386-
dc.identifier.scopuseid_2-s2.0-84971220423-
dc.identifier.volume138-
dc.identifier.issue19-
dc.identifier.spage6163-
dc.identifier.epage6170-
dc.identifier.eissn1520-5126-
dc.identifier.isiWOS:000376331000017-

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