Abstract
The electron-transfer quenching of the singlet excited state of polycyclic aromatic hydrocarbons (PAHs) by organic electron acceptors (cyano-and nitrobenzenes) has been investigated in acetonitrile and methanol. Intermolecular electron-transfer rate constants were determined. They follow a Rehm–Weller type correlation with the overall Gibbs energy of reaction. When the rate constants are below the diffusion control limit, in nearly all cases they are higher in methanol than in acetonitrile. The triplet state and free radical ions are formed in the quenching reaction. The charge-separation efficiency was also determined in both solvents. Using Eigen's equation for the cage-escape rate constants the global back electron transfer was estimated and correlated with the Gibbs energy change for the back-electron-transfer reaction, to the triplet state.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
