-transparent.png){kind=logo}
The quantum yield of phthalocyanine-photosensitized generation of superoxide anion radical (O2-) was measured by the electron spin resonance (ESR) technique. From the redox potential data, it is concluded that O2- is formed by electron transfer from the singlet excited state (not triplet or ground state) of phthalocyanines (PCs) to oxygen. Since a much larger theoretical quantum yield of O2- generation (phi c) than experimental (phi m) was found, it is suggested that charge recombination processes between O2- and PCs+ occur more rapidly than O2- trapping by 5,5-dimethyl-1-pyrroline-1-oxide (DMPO). The results indicate that the use of DMPO as a spin trap is not an ideal method for measurement of the quantity of O2- formed via photosensitization.
X F Zhang, and
H J Xu, and
D W Chen
November 1985,
International journal of radiation biology and related studies in physics, chemistry, and medicine,
X F Zhang, and
H J Xu, and
D W Chen
May 1988,
Bulletin of environmental contamination and toxicology,
X F Zhang, and
H J Xu, and
D W Chen
August 2023,
Biochemistry. Biokhimiia,
X F Zhang, and
H J Xu, and
D W Chen
January 1981,
The Kurume medical journal,
X F Zhang, and
H J Xu, and
D W Chen
September 1996,
Masui. The Japanese journal of anesthesiology,
X F Zhang, and
H J Xu, and
D W Chen
February 1984,
Gan,
X F Zhang, and
H J Xu, and
D W Chen
September 2007,
Clinical biochemistry,
X F Zhang, and
H J Xu, and
D W Chen
August 2023,
The journal of physical chemistry letters,
X F Zhang, and
H J Xu, and
D W Chen
January 2015,
Current medicinal chemistry,
X F Zhang, and
H J Xu, and
D W Chen
September 2018,
The Journal of organic chemistry,
