Reduction of Triplet C60by Hydrogen-Bonded Naphthols: Concerted Electron and Proton Movement
- 1 March 1997
- journal article
- research article
- Published by Taylor & Francis in Fullerene Science and Technology
- Vol. 5 (2) , 343-353
- https://doi.org/10.1080/15363839708011996
Abstract
Hydrogen bonding equilibria, redox potentials and quenching of tripletC60 in naphthol solutions containing added pyridines are studied by absorption spectroscopy, nanosecond flash photolysis and cyclic-voltammetry. It is shown that the quenching reaction involves reduction of the triplet by a hydrogen bonded naphthol-pyridine pair, with formation of C60 neutral naphthoxy radical and protonated base. Quenching rates increase with pyridine basicity, in parallel with decreased naphthol oxidation potential, and decrease with deuteration of the naphthol. It is concluded that electron and proton movement from die naphthol respectively to 3C60 and to base is concerted. Bulk radical yield increases with pyridine basicity and solvent polarity.Keywords
This publication has 13 references indexed in Scilit:
- C60 as a Photocatalyst of Electron-Transfer Processes: Reactions of Triplet C60 with Chloranil, Perylene, and Tritolylamine Studied by Flash Photolysis and FT-EPRThe Journal of Physical Chemistry, 1996
- Concerted Electron and Proton Movement in Quenching of Triplet C60 and Tetracene Fluorescence by Hydrogen-Bonded Phenol-Base PairsThe Journal of Physical Chemistry, 1995
- Study of Acid-Base and Redox Equilibria for the C60/C60H2 System in Dimethyl Sulfoxide SolventThe Journal of Physical Chemistry, 1994
- Electrochemical Studies of the Protonation of C60- and C602-The Journal of Physical Chemistry, 1994
- Electroreduction of Buckminsterfullerene, C60, in aprotic solvents. Solvent, supporting electrolyte, and temperature effectsThe Journal of Physical Chemistry, 1992
- Extinction coefficients of C60 triplet and anion radical, and one-electron reduction of the triplet by aromatic donorsChemical Physics Letters, 1992
- Electron transfers in chemistry and biologyBiochimica et Biophysica Acta (BBA) - Reviews on Bioenergetics, 1985
- Reaction of tert-butoxy radicals with phenols. Comparison with the reactions of carbonyl tripletsJournal of the American Chemical Society, 1981
- Charge Transfer Processes in Condensed MediaPublished by Springer Nature ,1979
- Hydrogen Bonding Effect on the Fluorescence of Some Nitrogen Heterocycles. IBulletin of the Chemical Society of Japan, 1957