Bulletin of the Chemical Society of Japan p. 1649 - 1659 (2001)
Update date:2022-08-10
Topics:
Mohan
Mittal
Pulse radiolysis technique has been employed to investigate the nature and the redox properties of the transient species generated on radiolysis of aqueous solution of (4-methylthiophenyl)methanol (MTPM). Pulse radiolysis in 1,2-dichloroethane, reaction with specific one-electron oxidants (Cl2-, SO4-, Tl2+, Br) and reaction of OH radicals in acidic solution showed absorption bands at 320 and 545 nm; these are assigned to solute radical cation with positive charge on the benzene ring. OH-adduct was observed in neutral solution. The oxidation potential for MTPM/MTPM+ couple is determined to be 1.55 ± 0.04 V vs NHE. eaq- reacts with a bimolecular rate constant of 1.5 × 109 dm3 mol-1 s-1 and the transient absorption bands (λax = 320, 470 nm) are assigned to the solute radical anion. E0 value for MTPM/MTPM- couple is determined to be -1.84 ± 0.04 V vs NHE. The redox properties of the transient species formed on reaction with OH, H, and O- have been evaluated.
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