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Spectrophotometric evidence for the formation of short-lived hypomanganate(V) and manganate(VI) transient species during the oxidation of K-carrageenan by alkaline permanganate
Journal article   Peer reviewed

Spectrophotometric evidence for the formation of short-lived hypomanganate(V) and manganate(VI) transient species during the oxidation of K-carrageenan by alkaline permanganate

Gamal A Ahmed, Ahmed Fawzy and Refat M Hassan
Carbohydrate research, Vol.342(10), pp.1382-1386
23/07/2007
DOI: https://doi.org/10.1016/j.carres.2007.03.022
PMID: 17445786

Abstract

Carrageenan - chemistry Carrageenan - classification Hydrogen-Ion Concentration Manganese Compounds - chemistry Models, Chemical Oxidation-Reduction Oxides - chemistry Spectrophotometry Spectrophotometry, Infrared
Spectrophotometric detection of the formation of short-lived hypomanganate(V), [KCAR-Mn(V)O43-], and manganate(VI), [KCAR-Mn(VI)O42-], intermediates has been confirmed through the oxidation of K-carrageenan (KCAR) by potassium permanganate in alkaline solutions of pH's >or= 12 using a conventional spectrophotometer. The short-lived transient species were characterized and a mechanism consistent with experimental observations is suggested.

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