| Attributs | Valeurs |
|---|
| type
| |
| Is Part Of
| |
| Subject
| |
| Title
| - Photoinduced Charge Separation and Recombination in Acridine−Triarylamine-BasedRedox Cascades
|
| has manifestation of work
| |
| related by
| |
| Author
| |
| Abstract
| - In this contribution, we report on the synthesis and the photophysical characterization of redox cascades,consisting of an acridine acceptor and up to three triarylamine donor subunits. These chromophores weredesigned in order to study directed photoinduced electron transfer along a redox gradient which results in along-lived charge separated state. The electronic coupling in between the redox subunits was tuned by stericalas well as electronic effects to investigate their influence on the kinetics of various deactivation pathways.Lifetime and population of intermediate charge transfer and charge separated states depend strongly on donorstrength of corresponding redox centers as well as on solvent polarity. We identified a low lying localizedexcited triplet state as an energy trap for all deactivation mechanisms in all cascades. The rate for populationand depopulation of the involved excited states were determined by stationary and time-resolved fluorescenceand absorption spectroscopy, respectively.
|
| article type
| |
| is part of this journal
| |
