Oxidation of 3,5-di-tert-butylcatechol in the presence of V-polyoxometalate

✍ Scribed by Xue-Feng Hu; Lei Wu

• Book ID: 111491551
• Publisher: Versita
• Year: 2012
• Tongue: English
• Weight: 203 KB
• Volume: 66
• Category: Article
• ISSN: 0366-6352
• DOI: 10.2478/s11696-011-0119-x

✦ Synopsis

Abstract

The oxidase and dioxygenase reactions of 3,5-di-tert-butylcatechol (DTBC, I) in the presence of V-polyoxometalate were studied. It was found that the addition of a Lewis base quenched the V-polyoxometalate-catalysed catechol dioxygenase reaction and catalysed the oxidase reaction selectively. The existence of V-polyoxometalate accelerates the autoxidation rate of I as demonstrated by the rate measurements. ESR and UV-VIS spectra showed that the Lewis base destroyed the dioxygenation reaction catalyst as formed and restrained its regeneration by suppressing the coordination of catechol radical to vanadium. The by-products of the dioxygenation and oxidation reactions are H2O and H2O2, respectively.