Solvent-Mediated Activation/Deactivation of Photoinduced Electron-Transfer in a Molecular Dyad

Larsen, Christopher B. and Farrow, George A. and Smith, Lian D. and Appleby, Martin and Chekulaev, Dimitri and Weinstein, Julia and Wenger, Oliver S.. (2020) Solvent-Mediated Activation/Deactivation of Photoinduced Electron-Transfer in a Molecular Dyad. Inorganic Chemistry, 59 (15). pp. 10430-10438.

PDF - Accepted Version

Official URL: https://edoc.unibas.ch/77989/

Downloads: Statistics Overview


Herein is presented a molecular dyad comprised of a [Ru(bpy)3]2+ photosensitizer and an anthraquinone (AQ) acceptor coupled by an ethynyl linker ([Ru(bpy)2(bpy-cc-AQ)]2+) in which activation/deactivation of photoinduced electron-transfer from the [Ru(bpy)3]2+ photosensitizer to the AQ acceptor is achieved and characterized as a function of the dielectric constant and hydrogen-bond donating ability of the solvent used. It is demonstrated that the rate of photoinduced electron-transfer can be modulated over several orders of magnitude (105-1011 s-1) by choice of solvent. Nanosecond transient absorption spectra are dominated by MLCT signals and exhibit identical decay kinetics to the corresponding emission signals. Ultrafast transient absorption and time-resolved infrared spectroscopies provide direct evidence for the formation of the charge-separated (CS) state and rapid (on the order of a few picoseconds) establishment of an excited-state pseudoequilibrium.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Wenger)
UniBasel Contributors:Wenger, Oliver and Larsen, Christopher Bryan
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
edoc DOI:
Last Modified:03 Aug 2021 01:30
Deposited On:12 Aug 2020 15:53

Repository Staff Only: item control page