en
Scientific article
Open access
English

The excited-state dynamics of the radical anions of cyanoanthracenes

Published inPhysical chemistry chemical physics, vol. 24, no. 1, p. 568-577
Publication date2022
First online date2022
Abstract

The radical anion of 9,10-dicyanoanthracene (DCA) has been suggested to be a promising chromophore for photoredox chemistry, due to its nanosecond excited-state lifetime determined from indirect measurements. Here, we investigate the excited-state dynamics of the radical anion of three cyanoanthracenes, including DCA˙−, produced by photoinduced electron transfer in liquid using both pump–probe and pump–pump probe transient electronic absorption spectroscopy. All three excited radical ions are characterised by a 3–5 ps lifetime, due to efficient non-radiative deactivation to the ground state. The decay pathway most probably involves D1/D0 conical intersection(s), whose presence is favoured by the enhanced flexibility of the radical anions relative to their neutral counterparts. The origin of the discrepancy with the nanosecond lifetime of DCA˙−* reported previously is discussed. These very short lifetimes limit, but do not preclude, photochemical applications of the cyanoanthracene anions.

eng
Research group
Citation (ISO format)
BECKWITH, Joseph, ASTER, Alexander, VAUTHEY, Eric. The excited-state dynamics of the radical anions of cyanoanthracenes. In: Physical chemistry chemical physics, 2022, vol. 24, n° 1, p. 568–577. doi: 10.1039/D1CP04014F
Main files (1)
Article (Published version)
Identifiers
ISSN of the journal1463-9076
255views
45downloads

Technical informations

Creation12/22/2021 5:48:00 PM
First validation12/22/2021 5:48:00 PM
Update time03/16/2023 2:16:21 AM
Status update03/16/2023 2:16:20 AM
Last indexation02/12/2024 1:34:47 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack