Reactions of pyridin-3-ol with pulse-radiolytically generated reducing species

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Abstract
Rate constants for reactions of hydrated electron, hydrogen atom, and other reducing radicals such as (CH3)2COH and CO2 – with pyridin-3-ol at different values of pH have been determined using the pulse-radiolysis technique. The absorption spectra of the transient product species and kinetic parameters pertaining to them have been investigated. Of the above reducing species all except e– aq lead to transient species other than the one-electron reduction product of pyridin-3-ol. (CH3)2ĊOH and CO2 – radicals are found to add on to the pyridin-3-ol ring. Pyridin-3-ol radicals formed by reaction with e– aq are found to be highly reducing in nature and transfer electrons to thionine, methylene blue, safranine, anthraquinone 2-sulphonate, paraquat, and benzophenone with almost diffusion-controlled rate constants.

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