Similar experiments provided rate constants at pH 7.0 and 12.0 of (6.6±1.0)×10 9 and (1.6±0.3)×10 9 M −1 s −1, respectively. The UV/Vis absorption spectrum of the hydroxycyclohexadienyl radical has a λ max=340 nm with a molar absorption coefficient of 4.1×10 3 l mol ...
Isoprene (C5H8) globally accounts for half of the non-methane hydrocarbon flux into Earth´s atmosphere. Its degradation is mainly initiated by the gas-phase reaction with OH radicals yielding a complex system of RO2 radicals. Subsequent product format
Hydroxyl radical Organic buffer Hydroxyl radical scavenger Rate constant Abbreviations Hepes, 4-(2-hydroxyethyl)-1-piperazine-ethanesulphonic acid Tricine, N-[2-hydroxy-1,1-bis-(hydroxymethyl)ethyl]glycine Tris, 2-amino-2-hydroxy-methylpropane-1,3-diol ...
Understanding the mechanism of hydrazine oxidation reaction by OH radical along with the rate constants of all possible pathways leads to explain the fate of hydrazine in the atmosphere. In this article, the comprehensive mechanisms and kinetics of the hydrazine plus hydroxyl radical reaction have been...
Hydroxyl radical production by reaction of zero-valent iron nanoparticles with oxygen: Mass balances and yieldsKeenan, Christina RDuesterberg, ChrisWaite, T DavidSedlak, David L
Hydroxyl radicalTheoreticalDynamics of imidogen reaction with hydroxyl radical over the lowest doublet potential energy surface was investigated at the CBS-QB3 level of theory using the two methods of quasi-classical trajectory (QCT) and master equation calculations. The reaction probabilities and total...
Recent work has suggested this discrepancy can be reconciled by the rapid reaction of hydroxyl and methylperoxy radicals with a methanol branching fraction of 30%. However, for fractions below 15%, methanol underprediction is exacerbated. Theoretical investigations of this reaction are challenging ...
Intermediate radicals formed in the reaction of the hydroxyl radical with some carboxylic acids, amines, and amino acids have been studied by esr spectroscopy using a continuous-flow method. A titanous chloride-hydrogen peroxide system is employed as a source of the hydroxyl radical in most experim...
Hydroxyl radical; ESR spin trapping Abstract The effect of various organic acids on hydroxyl radical (· OH) generation in the Fenton reaction were examined by the ESR spin trapping technique, where 5,5-dimethyl-1-pyroline-N-nitroxide (DMPO) and α-phenyl-tert- butyl nitrone (PBN) were used...
In this work we have performed a QSAR study of atmospheric reactions with hydroxyl radical, at the B3LYP level of theory with 6-31G(d) basis set. Molecular descriptors selected by applying multiple linear stepwise regression (MLR) analysis were used to predict the reaction rate constants (-log...