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Single-Molecule Reactive Oxygen Species Detection in Photocatalytic Reactions

Peroxides (2014)

  1. Takashi Tachikawa,
  2. Tetsuro Majima

Published Online: 17 JUN 2013

DOI: 10.1002/9780470682531.pat0862

Patai's Chemistry of Functional Groups

Patai's Chemistry of Functional Groups

How to Cite

Tachikawa, T. and Majima, T. 2013. Single-Molecule Reactive Oxygen Species Detection in Photocatalytic Reactions. Patai's Chemistry of Functional Groups.

Author Information

  1. Osaka University, The Institute of Scientific and Industrial Research (SANKEN), Ibaraki, Osaka, Japan

Publication History

  1. Published Online: 17 JUN 2013

Abstract

In this chapter, we have focused on the fluorescence detection of reactive oxygen species, such as singlet oxygen and hydroxyl radical, with single dye molecules under a microscope. In particular, successful applications of single-molecule fluorescence micro(spectro)scopy for the investigation of TiO2 photocatalytic reactions are demonstrated. The spatially resolved imaging techniques enable us to determine the spatial distribution of ROS and the location of (photo)catalytically active sites that are related to the heterogeneously distributed defects on the surface. Results of these studies provided important information for elucidating the mechanism of heterogeneous chemical reactions on catalyst nanoparticles and for designing new materials for applications in a variety of areas.

Keywords:

  • fluorescence dye;
  • reactive oxygen species;
  • single-molecule fluorescence spectroscopy;
  • TiO2 photocatalyst