Spectrophotometric detection of short-lived manganate (VI) intermediate through oxidation of some natural and synthetic polymers by alkaline permanganate

Authors
El-Azhari, S Hassan, RM
Citation
S. El-azhari et Rm. Hassan, Spectrophotometric detection of short-lived manganate (VI) intermediate through oxidation of some natural and synthetic polymers by alkaline permanganate, SPECT LETT, 32(1), 1999, pp. 17-29
Citations number
32
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
SPECTROSCOPY LETTERS
ISSN journal
00387010 → ACNP
Volume
32
Issue
1
Year of publication
1999
Pages
17 - 29
Database
ISI
SICI code
0038-7010(1999)32:1<17:SDOSM(>2.0.ZU;2-X
Abstract
Spectrophotometric evidence for the formation of a short-lived Mn(VI) inter mediate has been confirmed during the oxidation of pectin polysaccharide, a natural polymer, as well as poly (vinyl alcohol) [PVA], a synthetic polyme r, by potassium permanganate in alkaline medium at pH's > 12. This Mn(VI) i ntermediate was characterized by a band at a wavelength of 606 nm an absorp tion maximum, with a molar extinction coefficient of 1200 +- 50 dm(3) mol(- 1) cm(-1).