Mechanism of decomposition of peroxynitric ion (O2NOO-):: Evidence for the formation of O2•- and •NO2 radicals

被引:50
作者
Goldstein, S [1 ]
Czapski, G
Lind, J
Merenyi, G
机构
[1] Hebrew Univ Jerusalem, Dept Phys Chem, IL-91904 Jerusalem, Israel
[2] Royal Inst Technol, Dept Chem, S-10044 Stockholm 70, Sweden
关键词
D O I
10.1021/ic980051l
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The rate constant of the self-decomposition of O2NOO- was determined to be 1.35 +/- 0.03 s(-1) at 25 degrees C. The decomposition rate constant of O2NOO- in the presence of C(NO2)(4), CuSO4, SOD, and Fe(CN)(6)(4-) was found to be 2.4 +/- 0.2 s(-1), independent of the concentration of these substrates. The oxidation yields of C(NO2)(3)(-) and ferricyanide were measured to be 47 +/- 5 and 83 +/- 9% of added peroxynitrate, respectively, where the latter decreased to 54 +/- 6% in the presence of SOD. We therefore suggest that ca. 50% of O2NOO- homolyses into O-2(.-) and . NO2 (k = 1.05 +/- 0.23 s(-1)). The equilibrium constant of the homolysis of O2NOO- into . NO2 and O-2(.-) and the reduction potential of the couple O2NOOH,H+/NO3- were calculated to be 2.3 x 10(-10) M and 1.83 V, respectively.
引用
收藏
页码:3943 / 3947
页数:5
相关论文
共 14 条
[1]   AQUEOUS PEROXYNITRIC ACID (HOONO2) - A NOVEL SYNTHESIS AND SOME CHEMICAL AND SPECTROSCOPIC PROPERTIES [J].
APPELMAN, EH ;
GOSZTOLA, DJ .
INORGANIC CHEMISTRY, 1995, 34 (04) :787-791
[2]   REACTIVITY OF HO2/O-2 RADICALS IN AQUEOUS-SOLUTION [J].
BIELSKI, BHJ ;
CABELLI, DE ;
ARUDI, RL ;
ROSS, AB .
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1985, 14 (04) :1041-1100
[3]   SPECTROPHOTOMETRIC METHOD FOR DETERMINATION OF TETRANITROMETHANE IN SOLUTION + IN AIR [J].
GLOVER, DJ ;
LANDSMAN, SG .
ANALYTICAL CHEMISTRY, 1964, 36 (08) :1690-&
[4]   Reactivity of peroxynitric acid (O2NOOH): A pulse radiolysis study [J].
Goldstein, S ;
Czapski, G .
INORGANIC CHEMISTRY, 1997, 36 (19) :4156-4162
[5]  
KELENY RA, 1981, J AM CHEM SOC, V103, P2203
[6]   H2O2 DETERMINATION BY THE I-3(-) METHOD AND BY KMNO4 TITRATION [J].
KLASSEN, NV ;
MARCHINGTON, D ;
MCGOWAN, HCE .
ANALYTICAL CHEMISTRY, 1994, 66 (18) :2921-2925
[7]   DECOMPOSITION OF PERNITRIC ACID IN AQUEOUS-SOLUTION [J].
LAMMEL, G ;
PERNER, D ;
WARNECK, P .
JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (15) :6141-6144
[8]  
LOGAGER T, 1993, J PHYS CHEM-US, V97, P10047
[9]   ONE-ELECTRON AND 2-ELECTRON REDUCTION POTENTIALS OF PEROXYL RADICALS AND RELATED SPECIES [J].
MERENYI, G ;
LIND, J ;
ENGMAN, L .
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 1994, (12) :2551-2553
[10]   Thermodynamics of peroxynitrite and its CO2 adduct [J].
Merenyi, G ;
Lind, J .
CHEMICAL RESEARCH IN TOXICOLOGY, 1997, 10 (11) :1216-1220