Stepwise Photoinduced Electron Transfer in a Tetrathiafulvalene-Phenothiazine-Ruthenium Triad
- Publication type:
- Journal article
- Metadata:
-
- Autoren
- Michael Skaisgirski
- Christopher B Larsen
- Christoph Kerzig
- Oliver S Wenger
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000492816400014&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1002/ejic.201900453
- eISSN
- 1099-0682
- Externe Identifier
- Clarivate Analytics Document Solution ID: JH5NX
- ISSN
- 1434-1948
- Ausgabe der Veröffentlichung
- 39-40
- Zeitschrift
- EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
- Schlüsselwörter
- Electron transfer
- Time-resolved spectroscopy
- Donor-acceptor systems
- Charge transfer
- Photochemistry
- Paginierung
- 4256 - 4262
- Datum der Veröffentlichung
- 2019
- Status
- Published
- Titel
- Stepwise Photoinduced Electron Transfer in a Tetrathiafulvalene-Phenothiazine-Ruthenium Triad
- Sub types
- Article
- Ausgabe der Zeitschrift
- 2019
Data source: Web of Science (Lite)
- Other metadata sources:
-
- Abstract
- <jats:p>A molecular triad comprising a [Ru(bpy)<jats:sub>3</jats:sub>]<jats:sup>2+</jats:sup> (bpy = 2,2′‐bipyridine) photosensitizer, a primary phenothiazine (PTZ) donor and a secondary (extended) tetrathiafulvalene (exTTF) donor was synthesized and explored by UV/Vis transient absorption spectroscopy. Initial photoinduced electron transfer from PTZ to the <jats:sup>3</jats:sup>MLCT‐excited [Ru(bpy)<jats:sub>3</jats:sub>]<jats:sup>2+</jats:sup> occurs within less than 60 ps, and subsequently PTZ is regenerated by electron transfer from exTTF with a time constant of 300 ps. The resulting photoproduct comprising exTTF<jats:sup><jats:bold>·</jats:bold>+</jats:sup> and [Ru(bpy)<jats:sub>3</jats:sub>]<jats:sup>+</jats:sup> has a lifetime of 6100 ps in de‐aerated CH<jats:sub>3</jats:sub>CN at room temperature. Additional one‐ and two‐pulse laser flash photolysis studies of the triad were performed in the presence of excess methyl viologen (MV<jats:sup>2+</jats:sup>), to explore the possibility of light‐driven charge accumulation on exTTF. MV<jats:sup>2+</jats:sup> clearly oxidized [Ru(bpy)<jats:sub>3</jats:sub>]<jats:sup>+</jats:sup> and thereby re‐instated ground‐state [Ru(bpy)<jats:sub>3</jats:sub>]<jats:sup>2+</jats:sup> in triads in which exTTF had been oxidized to exTTF<jats:sup><jats:bold>·</jats:bold>+</jats:sup>, but further excitation of the solution containing the exTTF<jats:sup><jats:bold>·</jats:bold>+</jats:sup>‐PTZ‐[Ru(bpy)<jats:sub>3</jats:sub>]<jats:sup>2+</jats:sup> photoproduct did not provide evidence for exTTF<jats:sup>2+</jats:sup>. Nevertheless, it seems that the design principle of a covalent donor‐donor‐sensitizer triad (as opposed to simpler donor‐sensitizer dyads) is beneficial for light‐driven accumulation of oxidation equivalents. These investigations are relevant in the greater context of multi‐electron photoredox chemistry and artificial photosynthesis.</jats:p>
- Autoren
- Michael Skaisgirski
- Christopher B Larsen
- Christoph Kerzig
- Oliver S Wenger
- DOI
- 10.1002/ejic.201900453
- eISSN
- 1099-0682
- ISSN
- 1434-1948
- Ausgabe der Veröffentlichung
- 39-40
- Zeitschrift
- European Journal of Inorganic Chemistry
- Sprache
- en
- Online publication date
- 2019
- Paginierung
- 4256 - 4262
- Datum der Veröffentlichung
- 2019
- Status
- Published
- Herausgeber
- Wiley
- Herausgeber URL
- http://dx.doi.org/10.1002/ejic.201900453
- Datum der Datenerfassung
- 2023
- Titel
- Stepwise Photoinduced Electron Transfer in a Tetrathiafulvalene‐Phenothiazine‐Ruthenium Triad
- Ausgabe der Zeitschrift
- 2019
Data source: Crossref
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