en
Scientific article
English

Temperature Effect on Back Electron-Transfer Reactions within a Geminate Radical Pair: the Influence of the Solvent on the Adiabaticity of the Process

Published inChemical physics, vol. 139, no. 2-3, p. 381-390
Publication date1989
Abstract

A study of the temperature dependence (from 233 to 353 K) of the rate of back electron-transfer reactions within geminate radical pairs by measurement of the free radical yield is reported. The radical pair is generated by photoinduced electron transfer with rhodamine 6G and oxazine 118 cations as electron acceptors and aromatic amines and methoxy-benzene derivatives as electron donors in acetonitrile, methanol and ethanol. In acetonitrile, the back electron transfer is non-adiabatic and apparent negative activation energies are observed for barrierless reactions. In alcohol solvents, an anomalously large temperature dependence is observed, which is attributed to a solvent-controlled adiabatic behaviour.

Research group
Citation (ISO format)
VAUTHEY, Eric, SUPPAN, Paul. Temperature Effect on Back Electron-Transfer Reactions within a Geminate Radical Pair: the Influence of the Solvent on the Adiabaticity of the Process. In: Chemical physics, 1989, vol. 139, n° 2-3, p. 381–390. doi: 10.1016/0301-0104(89)80150-8
Identifiers
ISSN of the journal0301-0104
558views
0downloads

Technical informations

Creation09/21/2009 4:19:59 PM
First validation09/21/2009 4:19:59 PM
Update time03/14/2023 3:13:22 PM
Status update03/14/2023 3:13:22 PM
Last indexation05/02/2024 11:17:30 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack