56961-34-3Relevant academic research and scientific papers
Structure-reactivity relationships and substituent effect additivity in the aqueous oxidation of chlorophenols by cerium(iv)
Simon, Adrienn,Ballai, Csaba,Lente, Gabor,Fabian, Istvan
, p. 235 - 241 (2011)
The oxidation of all 19 chlorophenols and unsubstituted phenol by cerium(iv) was studied in an acidic aqueous solution in order to carry out a systematic test of chlorine substituent effects on the reactivity. All reactions were found to show 21 cerium(iv) phenol stoichiometry and a simple second-order rate equation. Rate constants did not correlate well with characteristic parameters such as pK values, carbon-13 NMR chemical shifts or Hammett substituent constants. Nevertheless, a strict additivity of chlorine substituent effects was found in both characteristic and reactivity parameters. The data suggest that a proton-coupled electron transfer mechanism could be operative. 2,4,6-Trichlorophenol was found to show exceptionally high reactivity towards cerium(iv). The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2011.
Hemo-acrylic polymers as catalyst for the oxidative dehalogenation of 2,4,6-trichlorophenol. Chloroperoxidase's mimic imprinting effects
Díaz-Díaz, Goretti,Blanco-López, M. Carmen,Lobo-Casta?ón, M. Jesús,Miranda-Ordieres, Arturo J.,Tu?ón-Blanco, Paulino
experimental part, p. 117 - 121 (2012/03/09)
Acrylic polymers with catalytic activity for the oxidative degradation of 2,4,6-trichlorophenol (TCP) were developed. In order to mimic the active site of chloroperoxidase (CPO), chloro-iron(III)-protoporphyrin IX was used as the catalytic centre, and methacrylamide (MA) and 4-vinylpyridine (VPY) were used as the monomers that build up the active sites. Taking as basis 3:1 (w/w) acid:basic aminoacidic composition of CPO, three MA:VPY combinations were tested: one keeping the same ratio (3:1) i.e. 25% VPY in the functional monomer mixture, one with lower content of the basic monomer (9:1) i.e. 10% VPY, and one with higher concentration of it (1:1) i.e. 50% VPY. Polymers synthesized with the lowest VPY content exhibited the highest catalytic efficiency, which was improved by the creation of specific TCP binding sites through molecular imprinting technology. In these way, synthetic enzymes with useful properties for analytical and bioremediation applications were obtained.
Kinetics of V(IV) Catalysed Oxidation of Phenols by Acid Bromate
Parimala, N.,Lakshmi, Vijaya,Sundaram, E. V.
, p. 667 - 669 (2007/10/02)
The oxidation of phenol and substituted phenols was studied using KBrO3 as oxidant in presence of V(IV) in binary solvent mixtures of acetic acid in water.Order with respect to oxidant is one and the order with respect to substrate and the catalyst is found to be fractional.The behaviour of acid shows that the order in acid is different under different acid concentrations.Effects of temperatures and percentage composition of acetic acid were studied.A suitable mechanism in presence of catalyst is given explaining the experimental facts.The effect of substituents was also studied and discussed.
