Stability of water-stable C60 clusters to OH radical oxidation and hydrated electron reduction

Jaesang Lee, Weihua Song, Seung S. Jang, John D. Fortner, Pedro J.J. Alvarez, William J. Cooper, Jae Hong Kim

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Reactions of water-stable C60 clusters (nC60) in water with OH radicals (•OH) and hydrated electrons (eaq -), generated by steady-state γ-radiation, were observed and characterized. Ordered C60 clusters were relatively recalcitrant to highly reactive •OH and eaq- species, with only a fraction of carbons oxidized and reduced, respectively. Pulse radiolysis suggested that the reactions of nC60 with OH• and e aq- were diffusion limited, with rate constants of (7.34 ± 0.31) - 109 M-1 s-1 and (2.34 ± 0.02) - 1010 M-1 s-1, respectively. Quantum mechanical calculations of binding energy of the C60-OH adduct as a function of C60 clustering degree indicate, despite an initial fast reaction, a slower overall conversion due to thermodynamic instability of C 60-OH intermediates. The results imply that ordered clustering of C60 in the aqueous phase significantly hinders C60s fundamental reactivity with radical species.

Original languageEnglish
Pages (from-to)3786-3792
Number of pages7
JournalEnvironmental Science and Technology
Volume44
Issue number10
DOIs
Publication statusPublished - 2010 May 15

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Fingerprint Dive into the research topics of 'Stability of water-stable C<sub>60</sub> clusters to OH radical oxidation and hydrated electron reduction'. Together they form a unique fingerprint.

  • Cite this

    Lee, J., Song, W., Jang, S. S., Fortner, J. D., Alvarez, P. J. J., Cooper, W. J., & Kim, J. H. (2010). Stability of water-stable C60 clusters to OH radical oxidation and hydrated electron reduction. Environmental Science and Technology, 44(10), 3786-3792. https://doi.org/10.1021/es903550e