Results 121 to 130 of about 1,846 (182)

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
openaire   +1 more source

Peroxynitrous acid formation induced by air spark plasma radiation

High Energy Chemistry, 2014
The reaction of the stable free radical diphenylpicrylhydrazyl (DPPH·) with water treated by plasma radiation of air spark discharge immediately after irradiation and for 13 days after irradiation has been studied. The choice is due to the fact that peroxynitrous acid ONOOH, which can be generated by irradiation, is a donor of atomic hydrogen and the ...
I. M. Piskarev, I. P. Ivanova, S. V. Trofimova, A. A. Ichetkina, O. E. Burkhina   +4 more
openaire   +1 more source

Theoretical Study on Raman Spectra of Aqueous Peroxynitric Acid

Chinese Journal of Chemical Physics, 2011
Using density functional theory and polarizable continuum models, we study the Raman spectra of aqueous peroxynitric acid. The calculated results indicate that the solvent effect has significant influence on the electric dipole transition moments between the ground and excited electronic state and Raman polarizabilities.
Wen-mei Wei, Ren-hui Zheng, Yuan-yuan Jing, Ya-ting Liu, Jun-cheng Hu, Yong Ye, Qiang Shi   +6 more
openaire   +1 more source

Observation of gas-phase peroxynitrous and peroxynitric acid during the photolysis of nitrate in acidified frozen solutions

Chemical Physics Letters, 2011
Abstract The photolysis of nitrate embedded in ice and snow can be a significant source of volatile nitrogen oxides affecting the composition of the planetary boundary layer. In this work, we examined the nitrogen oxides evolved from irradiated frozen solutions containing nitrate.
Otman Abida, Levi H. Mielke, Hans D. Osthoff   +2 more
openaire   +1 more source

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.
Christophe, Kurz, Xiuqiong, Zeng, Stefan, Hannemann, Reinhard, Kissner, Willem H, Koppenol   +4 more
openaire   +2 more sources

UV-spectrum and photodecomposition of peroxynitrous acid in the troposphere

Physical Chemistry Chemical Physics
Photolysis of HOONO is more rapid than thermal decomposition.
Wiem Chebbi, Najoua Derbel, Alexander Alijah, Thibaud Cours   +3 more
openaire   +2 more sources

Theoretical study on the isomerization of peroxynitrous acid (HOONO)

Journal of Molecular Structure: THEOCHEM, 2003
Abstract Isomerization processes of peroxynitrous acid (HOONO) is thoroughly investigated using hybrid density functional theory. The geometries of various stable conformers and transition states of HOONO have been optimized at the B3LYP/6-311+G(d,p) level of theory.
Hong Wei Jin, Zun Zhi Wang, Qian Shu Li, Xu Ri Huang   +3 more
openaire   +1 more source

Flow-injection chemiluminescence determination of chloroquine using peroxynitrous acid as oxidant

Talanta, 2004
A new flow-injection chemiluminescence (CL) method for determination of chloroquine is proposed based on a stronger chemiluminescence of chloroquine in hydrogen peroxide-nitrite-sulfuric acid medium. The proposed method allows the measurement of chloroquine over the range of 3.0x10(-7) to 1.0x10(-5)moll(-1).
Yao-Dong, Liang, Jun-Feng, Song, Xiao-Feng, Yang, Wei, Guo   +3 more
openaire   +2 more sources

Hydroxyl Radical Formation by O−O Bond Homolysis in Peroxynitrous Acid

Inorganic Chemistry, 2003
Peroxynitrite decay in weakly alkaline media occurs by two concurrent sets of pathways which are distinguished by their reaction products. One set leads to net isomerization to NO(3)(-) and the other set to net decomposition to O(2) plus NO(2)(-). At sufficiently high peroxynitrite concentrations, the decay half-time becomes concentration-independent ...
Sergei V, Lymar, Rafail F, Khairutdinov, James K, Hurst   +2 more
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Peroxynitrous-Acid-Induced Chemiluminescence of Fluorescent Carbon Dots for Nitrite Sensing

Analytical Chemistry, 2011
In this work, chemiluminescent (CL) property of the carbon dots in the presence of peroxynitrous acid was studied. Peroxynitrous acid is formed by online mixing of nitrite and acidified hydrogen peroxide. The CL intensity was increased linearly with nitrite concentration in the range from 1.0 × 10(-7) M to 1.0 × 10(-5) M, and the detection limit was 5 ...
Zhen, Lin, Wei, Xue, Hui, Chen, Jin-Ming, Lin   +3 more
openaire   +2 more sources