Engineering topics
Gagliardi, Christopher J.
Publications and source records attributed to Gagliardi, Christopher J..
Direct observation of light-driven, concerted electron–proton transfer
Significance Concerted proton-coupled electron transfer (EPT) reactions in which both electrons and protons transfer in tandem are at the heart of many chemical and biological conversions including photosystem II. We report here the direct observation of absorption bands arising from photoEPT transitions, in this case, in H-bonded complexes between N -methyl-4,4′-bipyridinium cation and biologically relevant donors including tyrosine. The importance of these observations follows from the earlier experimental observations by Taube and coworkers on intervalence transfer in mixed-valence complexes. The observation of these photoEPT transitions and the appearance of reactive radical products also points to a possible, if inefficient, role in DNA photodamage and, possibly, in the formation of reactive oxygen intermediates.
Role of Proton-Coupled Electron Transfer in the Redox Interconversion between Benzoquinone and Hydroquinone
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Proton-Coupled Electron Transfer
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