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Mechanisms of photochemistry and reactive oxygen production by fullerene suspensions in water.

Publication ,  Journal Article
Hotze, EM; Labille, J; Alvarez, P; Wiesner, MR
Published in: Environmental science & technology
June 2008

Buckminsterfullerene (C60) is a known photosensitizer that produces reactive oxygen species (ROS) in the presence of light; however, its properties in aqueous environments are still not well understood or modeled. In this study, production of both singlet oxygen and superoxide by UV photosensitization of colloidal aggregates of C60 in water was measured by two distinct methods: electron paramagnetic resonance (EPR) with a spin trapping compound, and spectrophotometric detection of the reduced form of the tetrazolium compound XTT. Both singlet oxygen and superoxide were generated by fullerol suspensions while neither was detected in the aqu/nC60 suspensions. A mechanistic framework for photosensitization that takes into account differences in C60 aggregate structure in water is proposed to explain these results. While theory developed for single molecules suggests that alterations to the C60 cage should reduce the quantum yield for the triplet state and associated ROS production, the failure to detect ROS production by aqu/nC60 is explained in part by a more dense aggregate structure compared with the hydroxylated C60.

Duke Scholars

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

June 2008

Volume

42

Issue

11

Start / End Page

4175 / 4180

Related Subject Headings

  • X-Ray Diffraction
  • Water Pollutants, Chemical
  • Ultraviolet Rays
  • Superoxides
  • Singlet Oxygen
  • Photochemistry
  • Microscopy, Electron, Transmission
  • Fullerenes
  • Environmental Sciences
 

Citation

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Hotze, E. M., Labille, J., Alvarez, P., & Wiesner, M. R. (2008). Mechanisms of photochemistry and reactive oxygen production by fullerene suspensions in water. Environmental Science & Technology, 42(11), 4175–4180. https://doi.org/10.1021/es702172w
Hotze, Ernest M., Jerome Labille, Pedro Alvarez, and Mark R. Wiesner. “Mechanisms of photochemistry and reactive oxygen production by fullerene suspensions in water.Environmental Science & Technology 42, no. 11 (June 2008): 4175–80. https://doi.org/10.1021/es702172w.
Hotze EM, Labille J, Alvarez P, Wiesner MR. Mechanisms of photochemistry and reactive oxygen production by fullerene suspensions in water. Environmental science & technology. 2008 Jun;42(11):4175–80.
Hotze, Ernest M., et al. “Mechanisms of photochemistry and reactive oxygen production by fullerene suspensions in water.Environmental Science & Technology, vol. 42, no. 11, June 2008, pp. 4175–80. Epmc, doi:10.1021/es702172w.
Hotze EM, Labille J, Alvarez P, Wiesner MR. Mechanisms of photochemistry and reactive oxygen production by fullerene suspensions in water. Environmental science & technology. 2008 Jun;42(11):4175–4180.
Journal cover image

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

June 2008

Volume

42

Issue

11

Start / End Page

4175 / 4180

Related Subject Headings

  • X-Ray Diffraction
  • Water Pollutants, Chemical
  • Ultraviolet Rays
  • Superoxides
  • Singlet Oxygen
  • Photochemistry
  • Microscopy, Electron, Transmission
  • Fullerenes
  • Environmental Sciences