Results 101 to 110 of about 1,721 (149)

Photon-Initiated Homolysis of Peroxynitrous Acid

Inorganic Chemistry, 2009
Laser flash photolysis of ONOOH at 355 nm and a pH of 4.0-5.5 causes homolysis of ONOOH nearly exclusively at the N-O bond rather than at the O-O bond (HO(2)(*)/HO(*) > 25:1). All of the NO(*) and HO(2)(*) radicals formed by photolysis subsequently recombine with a rate constant of (1.2 +/- 0.2) x 10(10) M(-1) s(-1) via second-order kinetics, as ...
Sturzbecher-Höhne M, Nauser T, Kissner R, Koppenol WH   +3 more
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Kinetics of decomposition of peroxynitrous acid

Journal of the Chemical Society A: Inorganic, Physical, Theoretical, 1969
The conversion of peroxynitrite into nitrate has been studied at 0° from pH 4 to 9. The kinetics are consistent with conversion's occurring through the peroxynitrous acid molecule, at a specific rate of 6 min.–1, and a pKa of 6·6.
W. G. Keith, R. E. Powell
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Kinetics Analysis of the Reactions between Peroxynitric Acid and Amino Acids

Chemical Research in Toxicology, 2020
Plasma disinfection using low-temperature atmospheric pressure plasma is widely studied in many applications, and the use of plasma-treated water (PTW) for disinfection is being developed by many researchers. Exposing plasma to water supplies and preserves reactive oxygen and nitrogen species (RONS) in the water, and this PTW exhibits bactericidal ...
Takashi Yokoyama, Shinya Miyazaki, Satoshi Ikawa, Yoichi Nakashima, Katsuhisa Kitano   +4 more
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Ion-exchange chromatographic analysis of peroxynitric acid

Journal of Chromatography A, 2016
Ion-exchange chromatographic analysis of peroxynitric acid (O2NOOH) was performed by combining an acidic eluate with an UV-vis detector and immersing the separation column in an ice-water bath. The decomposition behavior of peroxynitric acid in the solution was also studied using this system.
Yoichi Nakashima, Satoshi Ikawa, Atsushi Tani, Katsuhisa Kitano   +3 more
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Oxidation of Nitrite by Peroxynitrous Acid

The Journal of Physical Chemistry A, 2003
The kinetics of the oxidation of nitrite to nitrate by peroxynitrous acid at pH 5.2 is best described by the rate law kobs = kiso + k‘[NO2-] + k‘ ‘[NO2-]2, in which the peroxynitrous acid isomerization rate constant kiso = (1.10 ± 0.05) s-1, k‘ = (3.2 ± 0.1) M-1 s-1, and k‘ ‘ = (4.2 ± 0.3) M-2s-1, at 25 °C.
Maurer, Patrick, Thomas, Chris F., Kissner, Reinhard, Rueegger, Heinz, Greter, Oswald, Roethlisberger, Ursula, Koppenol, Willem H.   +6 more
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The kinetics of the decay of gaseous peroxynitric acid

Chemical Physics Letters, 1978
Abstract A kinetic study has been made of the thermal decay of HO 2 NO 2 using long path, FT IR spectroscopy. Mixtures containing HO 2 O 2 were prepared by the photolysis of Cl 2 , H 2 , and NO 2 in synthetic air (7000 torr). The observed decay law consisted of both first and second order components.
William M. Uselman, Stuart Z. Levine, Walter H. Chan, Jack G. Calvert, John H. Shaw   +4 more
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Spectroscopic Characterization of Peroxynitrous Acid in cis-perp Configurations

The Journal of Physical Chemistry A, 2006
This paper presents experimental evidence, supported by two-dimensional theoretical calculations, that HOONO can be observed in cis-perp (cp) configurations in a pulsed supersonic expansion. The spectral properties (transition frequency, rotational constants, and transition type) of OH overtone transitions originating from a state with predominately cp
Eunice X J, Li, Ian M, Konen, Marsha I, Lester, Anne B, McCoy   +3 more
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Free radical yields from the homolysis of peroxynitrous acid

Free Radical Biology and Medicine, 1992
A recent study reports discordant results for maximal free-radical yields from the decomposition of peroxynitrous acid using different assay reagents and a puzzling decrease (to zero) of the radical yields with increasing pH. An assay method using 2,2,'azino-bis(3-ethyl-benzthiazoline sulphonate) (ABTS) has been tested using stopped-flow kinetic ...
G, Yang, T E, Candy, M, Boaro, H E, Wilkin, P, Jones, N B, Nazhat, R A, Saadalla-Nazhat, D R, Blake   +7 more
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Peroxynitrous acid: controversy and consensus surrounding an enigmatic oxidant

Dalton Transactions, 2012
The isomerisation of ONOOH to NO(3)(-) and H(+), some oxidations and all hydroxylations and nitrations of aromatic compounds are first-order in ONOOH and zero-order in the compounds that are modified. These reactions are widely believed to proceed via homolysis of ONOOH into HO˙ and NO(2)˙ to an extent of ca. 30%.
Koppenol WH, Bounds PL, Nauser T, Kissner R, Rüegger H   +4 more
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On the Chemical and Electrochemical One-Electron Reduction of Peroxynitrous Acid

The Journal of Physical Chemistry A, 2005
Peroxynitrous acid was reduced by cathodic linear sweep voltammetry at a gold electrode and by iodide at pH 3.2 and 5.6. The cathodic reduction wave was identified by measuring its decay in time, which was the same as observed by optical spectroscopy. The iodide oxidation was followed by optical measurement of the triiodide formation.
Kurz C, Zeng X, Hannemann S, Kissner R, Koppenol WH   +4 more
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