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Photolytic Release of Carboxylic Acids Using Linked Donor−Acceptor Molecules:  Direct versus Mediated Photoinduced Electron Transfer to N-Alkyl-4-picolinium Esters

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journal contribution
posted on 23.06.2005, 00:00 by Chitra Sundararajan, Daniel E. Falvey
Efficient photorelease (Φ = 0.7) of carboxylic acids is achieved with a covalently linked mediator (benzophenone) protecting group (N-alkyl-4-picolinium ester) molecule. The mechanism involves initial photoreduction of the mediator, followed by rapid electron transfer to the protecting group.