12033-49-7Relevant articles and documents
Chlorine Nitrate Photochemistry. Photolysis Products and Kinetics of the Reaction Cl + ClONO2 -> Cl2 + NO3
Margitan, James J.
, p. 674 - 679 (1983)
The photolysis of chlorine nitrate was studied at 266 and 355 nm by using atomic resonance fluorescence detection of the primary products (O and Cl).The major photolysis route is to Cl + NO3 (Φ1=0.90) with the O + ClONO channel accounting for Φ2=0.10.The kinetics of the reaction Cl + ClONO2 -> Cl2 + NO3 (k4) were studied over the temperature range 219-298 K.In Arrhenius form, K4(T)=6.3 x 10-12 exp(150/T).The value k4(298)=1.04 x 10-11 cm3 s-1 is a factor of 50 faster than previously reported.A possible error in the prior kinetics study is identified, and the divergent results of earlier quantum yield studies are reconciled.
Reaction of O(3P) with ClONO2: Rate coefficients and yield of NO3 product
Goldfarb, Leah,Harwood, Matthew H.,Burkholder, James B.,Ravishankara
, p. 8556 - 8563 (1998)
The rate coefficient for the reaction O(3P) with ClONO2, k1, was measured between 202 and 325 K using two methods: pulsed laser photolysis with time-resolved atomic resonance fluorescence detection of the O atoms and pulse
Methods for preparing standard nitrate radical (NO3) gas to calibrate the LIF-based instrument for measurements in the atmosphere
Matsumoto, Jun,Imai, Hidekazu,Kosugi, Naohiro,Kajii, Yoshizumi
, p. 1214 - 1215 (2007/10/03)
Preparation of standard NO3 gas is explored at the level of ppbv for atmospheric measurements utilizing an LIF instrument. The sequence of thermal decomposition of N2O5 and gas phase titration of NO3 by adding NO is useful. To reduce NO2 contamination in N2O5, N2O5 trapping after mixing NOx and O3 was adopted. As a convenient method in the field studies, dynamic mixing of NOx and O3 was explored. Copyright
Reaction of hydroxyl radical with nitric acid: Insights into its mechanism
Brown, Steven S.,Burkholder, James B.,Talukdar, Ranajit K.,Ravishankara
, p. 1605 - 1614 (2007/10/03)
The rate constant for the reaction of hydroxyl radicals with nitric acid has an unusual pressure and temperature dependence. To explore the mechanism for this reaction, we have measured rate constants for reactions of isotopically substituted species OD+DNO3, OH+DNO3, OD+HNO3, and 18OH+HNO3 and the yield of NO3 product. Deuterium substitution on nitric acid results in more than a 10-fold reduction in the rate constant, removes the pressure dependence (over the observed range of 20-200 Torr in He and SF6), and leads to a strongly curved Arrhenius temperature dependence. Deuterium substitution on hydroxyl increases the rate constant slightly but does not change the pressure dependence. There is no evidence for exchange reactions in the isotopically mixed reactions. Absorption measurements of the NO3 product yield show that the title reaction produces nitrate radical with unit efficiency over all temperatures and pressures studied. We discuss the implications of the measured rate constants, product yields, and lack of isotopic exchange in terms of a mechanism that involves formation of a hydroxyl radical-nitric acid complex and its subsequent reaction to give NO3 and H2O.
