Journal of Physical Chemistry p. 281 - 285 (1981)
Update date:2022-08-11
Topics:
Yamagishi, Akihiko
Masui, Takeshi
Watanabe, Fumiyuki
The oxidations by Ce(IV) ion of the cations of acridine orange (AOH+) and its N-alkyl derivatives (AO+-(CH2)nH) have been studied in water and in the reversed micellar system of cetylpyridinium chloride (CyPCl)/water/chloroform.The length of a substituting alkyl chain (n) is varied from methyl to octadecyl groups.In both media, the oxidation is found to proceed via the two-step mechanism: (1) AO+-(CH2)nH + Ce(IV) -> I + Ce(III) (k1) and (2) I + Ce(IV) -> P + Ce(III) (k2), where I and P denote the one- and two-electron oxidized species, respectively.In water, the bimolecular rate constants, k1 and k2, do not vary very much with the change of n; k1 = 7.0 X 104-14 X 104 M-1 s-1 and k2 = 2.1 X 104-5.9 X 104 M-1 s-1 for n = 0-9 at
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