Kinetics of oxidation of polyoxyethylene chain of polyoxyethylene- t-octyl phenol (Triton X-100) by diperiodatoargenate (III)

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 277; no. 1; pp. 207 - 213
• Main Authors: Manhas, Manmeet Singh, Khan, Zaheer
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 05.04.2006; Elsevier
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Kinetics; Oxidation; Reduction; Silver(III); Surfactant; Silver(III); Reduction; Oxidation; Kinetics; Surfactant; Non ionic surfactant; Alcohol; Transition metal; Chemical reduction; Silver; Phenol; Phenols; Benzenic compound
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2005.11.077

The oxidative degradation of polyoxyethylene chain of TritonX-100 by diperiodatoargentate(III) (DPA) is reported for the first time. The kinetics of the reaction has been studied by conventional spectrophotometric method at 362 nm. Under pseudo-first order conditions, the rection rate is first- and fractional-order, respectively, in diperiodatoargentate(III) and Triton X-100. The formation of a complex between Triton X-100 and diperiodatoargentate(III) was characterized kinetically and the formation constant has been determined ( K c = 307 mol −1 dm 3). On addition of periodate, there is a decrease in the rate constants. The aquated silver(III) is found to be more reactive in comparison to hydroxylated silver(III) species. The reaction product is also examined. Monomeric and aggregated TritonX-100 molecules are oxidized by diperiodatoargentate(III). Reducing nature of the TritonX-100 is found to be due to the presence of primary alcoholic ( OH) group in the skeleton. On the basis of the observed data, a probable mechanism is proposed for the redox reaction of diperiodatoargentate(III) and TritonX-100.