Relative one-electron reduction potentials for carotenoid radical cations and the interactions of carotenoids with the vitamin E radical cation

A study was conducted on the rates of electron transfer between pairs of carotenoids with one serving as the radical cation. The results revealed the order of six cartenoids in terms of their reduction potential. The interactions of carotenoids with the vitamin E radical cation was also examined with the use of pulse radiolysis. Results revealed the order of seven cartenoids based on the relative ease of their electron transfer.