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  • R E Huie, S Padmaja
  • 1993
The rate constant for the reaction of NO with .O2- was determined to be (6.7 +/- 0.9) x 10(9) l mol-1 s-1, considerably higher than previously reported. Rate measurements were made from pH 5.6 to 12.5 both by monitoring the loss of .O2- and the formation of the product -OONO. The decay rate of -OONO, in the presence of 0.1 mol l-1 formate, ranges from 1.2(More)
The free-radical chemistry of sulfite oxidation is reviewed. Chemical transformations of organic and biological molecules induced by sulfite oxidation are summarized. The kinetics of the free-radical oxidations of sulfite are discussed, as are the kinetics of the reactions of the sulfite-derived radicals SO3 and the peroxy derivative SO5 with organic(More)
  • S Padmaja, R E Huie
  • 1993
Nitric oxide and organic peroxyl radicals are key reactive radicals implicated in a wide range of biological processes. We have measured rate constants for the reactions of several organic peroxyl radicals with nitric oxide in aqueous solution and found that they are all fast, with k = 1-3 x 10(9) L mol-1 s-1. The reactions lead to the formation of an(More)
Our previous measurements of the temperature dependencies of Henry's law constants of 26 polychlorinated biphenyls (PCBs) showed a well-defined linear relationship between the enthalpy and the entropy of phase change. Within a homologue group, the Henry's law constants converged to a common value at a specific isoequilibrium temperature. We use this(More)
Pulse radiolysis with spectrophotometric and conductometric detection was utilized to study the formation and reactions of radicals from benzene and dienes in aqueous solutions. The benzene OH adduct, *C6H6OH, reacts with O2 (k = 3 x 10(8) L mol(-1) s(-1)) in a reversible reaction. The peroxyl radical, HOC6H6O2*, undergoes O2*- elimination, bimolecular(More)
Rate constants have been determined for the reactions of NOz with S032and HS03in aqueous solutions. The rate constant increases from about 1.2 X lo7 M-’ s-l n ear pH 5 to 2.9 X lo7 M-ls-l a t pH 13. The reaction appears to involve the formation of an intermediate complex that may undergo subsequent reaction with NOz to yield the ultimate products or may(More)
Radiolytic (electron beam) and photolytic (ultraviolet, UV) dechlorination of polychlorinated biphenyls (PCBs) in a marine sediment are described. Samples of a PCB-laden marine sediment, Standard Reference Material (SRM) 1944, NewYork/New Jersey Waterway Sediment, have been mixed with aqueous alcohol solutions and irradiated with an electron beam or(More)
Electrospray ionization mass spectrometry is used to detect both the cations (C+) and the anions (A-) of ionic liquids (CA). In this study, the ionic liquids are diluted with aqueous methanol before injection. In addition to the main peaks of the parent ions, fragmentation products are observed upon increasing the cone voltage, whereas aggregates of the(More)