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Photoinduced Bimolecular Electron Transfer in Ionic Liquids: Cationic Electron Donors.
- Source :
-
The journal of physical chemistry. B [J Phys Chem B] 2018 Mar 01; Vol. 122 (8), pp. 2379-2388. Date of Electronic Publication: 2018 Feb 19. - Publication Year :
- 2018
-
Abstract
- Recently, we have reported a systematic study of photoinduced electron-transfer reactions in ionic liquid solvents using neutral and anionic electron donors and a series of cyano-substituted anthracene acceptors [ Wu , B. ; Maroncelli , M. ; Castner , E. W. Jr Photoinduced Bimolecular Electron Transfer in Ionic Liquids . J. Am. Chem. Soc. 139 , 2017 , 14568 ]. Herein, we report complementary results for a cationic class of 1-alkyl-4-dimethylaminopyridinium electron donors. Reductive quenching of cyano-substituted anthracene fluorophores by these cationic quenchers is studied in solutions of acetonitrile and the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. Varying the length of the alkyl chain permits tuning of the quencher diffusivities in solution. The observed quenching kinetics are interpreted using a diffusion-reaction analysis. Together with results from the prior study, these results show that the intrinsic electron-transfer rate constant does not depend on the quencher charge in this family of reactions.
Details
- Language :
- English
- ISSN :
- 1520-5207
- Volume :
- 122
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- The journal of physical chemistry. B
- Publication Type :
- Academic Journal
- Accession number :
- 29377698
- Full Text :
- https://doi.org/10.1021/acs.jpcb.7b12542