Quantum yields for OH production in the photodissociation of HNO(3) at 248 and 308 nm and H(2)O(2) at 308 and 320 nm

Physical Chemistry Chemical Physics : PCCP
Véronique RiffaultA R Ravishankara

Abstract

The quantum yields for OH formation from the photolysis of HNO(3) were measured to be (0.88 +/- 0.09) at 248 and (1.05 +/- 0.29) at 308 nm and of H(2)O(2) to be (1.93 +/- 0.39) at 308 and (1.96 +/- 0.50) at 320 nm. The quoted uncertainties are at the 95% confidence level and include estimated systematic uncertainties. OH radicals were produced using pulsed laser photolysis and monitored using pulsed laser-induced fluorescence. Quantum yields were measured relative to the OH quantum yields from a reference system. The measured quantum yields at 248 nm are in agreement with previous direct determinations. The quantum yield values at 308 and 320 nm are the first direct quantum yield measurements at these wavelengths and confirm the values currently recommended for atmospheric model calculations. Rate coefficients (at 298 K) for the OH + H(2)O(2) and OH + HNO(3) + M (in 100 Torr of N(2)) reactions were measured during this study to be (1.99 +/- 0.16) x 10(-12) cm(3) molecule(-1) s(-1) and (1.44 +/- 0.12) x 10(-13) cm(3) molecule(-1) s(-1), respectively.

References

Dec 8, 2004·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·J Robert Huber
Jan 21, 2005·Physical Chemistry Chemical Physics : PCCP·Elena JiménezA R Ravishankara

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Citations

Aug 26, 2015·The Journal of Physical Chemistry. a·Yingdi Liu, Stanley P Sander
Aug 20, 2016·Physical Chemistry Chemical Physics : PCCP·Hongyan XiaoKeiji Morokuma
Feb 4, 2010·The Journal of Physical Chemistry. a·Chengzhu ZhuLei Zhu
May 15, 2021·Environmental Science. Processes & Impacts·Kaitlyn GruberAmanda Nienow
Aug 13, 2010·The Journal of Physical Chemistry. a·Chengzhu Zhu, Lei Zhu
Apr 25, 2015·The Journal of Physical Chemistry. a·Lei ZhuLiang T Chu
Dec 24, 2020·Journal of the American Chemical Society·Josep M AngladaManuel F Ruiz-López

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