Carotenoid radical anions and their protonated derivatives

Ali El-Agamey, Ruth Edge, Suppiah Navaratnam, Edward J. Land, T. George Truscott

Research output: Contribution to journalArticlepeer-review


In this study, we report the protonation reactions for astaxanthin and canthaxanthin radical anions in methanol, alkaline methanol, and aqueous 2% Triton X-100 at different pH values. The pKa values for the corresponding α-hydroxy radical derivatives of astaxanthin, canthaxanthin, and β-apo-8‘-carotenal were estimated in 2% Triton X-100. Also, the effects of the microenvironment and the structure of the carotenoids on the protonation rate constant are discussed.
Original languageEnglish
Pages (from-to)4255-4258
JournalOrganic Letters
Issue number19
Publication statusPublished - 14 Sept 2006

Research Beacons, Institutes and Platforms

  • Dalton Nuclear Institute


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