Journal
CHINESE SCIENCE BULLETIN
Volume 55, Issue 25, Pages 2855-2858Publisher
SCIENCE PRESS
DOI: 10.1007/s11434-010-3143-2
Keywords
Hantzsch 1,4-dihydropyridines; molecular oxygen; photoinduced electron transfer; superoxide (O-2(-center dot))
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Funding
- National Natural Science Foundation of China [20732007, 20972171, 50973125]
- Ministry of Science and Technology of China [G2007CB808004, 2009CB2 20008]
- Bureau for Basic Research of the Chinese Academy of Sciences
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Photooxidation of Hantzsch 1,4-dihydropyridines (1,4-DHP, 1a-1d) by direct irradiation (lambda > 300 nm) under an oxygen atmosphere has been carefully examined in this work. Spectroscopic and electrochemical studies demonstrate that photoinduced singlet electron transfer from 1,4-DHP to molecular oxygen occurs. The generated superoxide radical anion (O-2 (-center dot)) is responsible for this typical photochemical oxidation.
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