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Photoinduced Electron Transfer in Linear Triarylamine-Photosensitizer-Anthraquinone Triads with Ruthenium(II), Osmium(II), and Iridium(III)

Hankache, Jihane and Niemi, Marja and Lemmetyinen, Helge and Wenger, Oliver S.. (2012) Photoinduced Electron Transfer in Linear Triarylamine-Photosensitizer-Anthraquinone Triads with Ruthenium(II), Osmium(II), and Iridium(III). Inorganic Chemistry, 51 (11). pp. 6333-6344.

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Official URL: http://edoc.unibas.ch/48172/

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Abstract

A rigid rod-like organic molecular ensemble comprised of a triarylamine electron donor, a 2,2′-bipyridine (bpy) ligand, and a 9,10-anthraquinone acceptor was synthesized and reacted with suitable metal precursors to yield triads with Ru(bpy)32+, Os(bpy)32+, and [Ir(2-(p-tolyl)pyridine)2(bpy)]+ photosensitizers. Photoexcitation of these triads leads to long-lived charge-separated states (τ = 80–1300 ns) containing a triarylamine cation and an anthraquinone anion, as observed by transient absorption spectroscopy. From a combined electrochemical and optical spectroscopic study, the thermodynamics and kinetics for the individual photoinduced charge-separation and thermal charge-recombination events were determined; in some cases, measurements on suitable donor–sensitizer or sensitizer–acceptor dyads were necessary. In the case of the ruthenium and iridium triads, the fully charge-separated state is formed in nearly quantitative yield.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Wenger)
UniBasel Contributors:Wenger, Oliver
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
ISSN:0020-1669
Note:Publication type according to Uni Basel Research Database: Journal article -- The final publication is available at American Chemical Society, see DOI link
Language:English
Identification Number:
Last Modified:13 Jun 2018 07:20
Deposited On:05 Jan 2017 10:28

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