Affiliation:
1. Department of Chemistry Indian Institute of Technology Guwahati Guwahati Assam 781039 India
2. The Manchester Institute of Biotechnology and Department of Chemical Engineering The University of Manchester 131 Princess Street Manchester M1 7DN (United Kingdom)
Abstract
AbstractChlorine oxyanions have various applications, such as bleaching and oxidizers in rocket fuels. However, their high solubility in water and long environmental lifetimes have led to ecological concerns, especially regarding drinking water quality. This study focuses on the conversion of chlorite to chlorine dioxide, which is of significant interest as it exhibits superior antimicrobial activity and generates less harmful byproducts for water treatment. Two nonheme iron(II) complexes capable of producing chlorine dioxide from chlorite at room temperature and pH 5.0 are presented. These complexes oxidize chlorite through high‐valent iron (IV)‐oxo intermediates formed in‐situ. The study establishes second‐order rate constants for chlorite oxidation and investigates the effects and mechanisms involved by substituting a methyl group in the secondary coordination sphere of the FeIV(O)(N4Py) system. By employing kinetic analysis and spectroscopic investigations, the crucial elements for the reaction mechanism in chlorite oxidation are identified. These findings pave the way for future advancements in this field.
Funder
Indian Institute of Technology Guwahati