Reduction of triplet C60 by hydrogen-bonded naphthols: Concerted electron and proton movement

Neeraj Gupta, Henry Linschitz, Làszlò Biczòk

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Abstract

Hydrogen bonding equilibria, redox potentials and quenching of triplet C60 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 the naphthol respectively to 3C60 and to base is concerted. Bulk radical yield increases with pyridine basicity and solvent polarity.

Original languageEnglish
Pages (from-to)343-353
Number of pages11
JournalFullerene Science and Technology
Volume5
Issue number2
DOIs
Publication statusPublished - Jan 1 1997

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ASJC Scopus subject areas

  • Chemical Engineering(all)

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