Infrared absorption cross-section measurements for nitrous acid (HONO) at room temperature
Journal Article
·
· Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory
Infrared adsorption cross sections for nitrous acid (HONO) were measured using HONO spectra recorded simultaneously by UV/visible and FTIR spectroscopy. HONO was prepared by the reaction of HCl(g) and NaNO{sub 2}(s) and was introduced into a 561 L environmental chamber equipped with parallel sets of White optics with total path 52.5 m for UV/visible and FTIR spectroscopy. Alternatively, HONO was prepared in situ by reaction of ClNO(g) with water vapor. Absolute concentrations of HONO were determined independently using the UV spectrum and published UV absorption cross sections. All experiments were carried out at 750 Torr total pressure in N{sub 2} at 294--297 K. Both Q-branch intensities and integrated absorbances for the HONO modes trans-{nu}{sub 3} (1263 cm{sup {minus}1}), cis-{nu}{sub 4} (852 cm{sup {minus}1}), and trans-{nu}{sub 4} (790 cm{sup {minus}1}) are reported. For trans-{nu}{sub 3} and cis-{nu}{sub 4} the authors also include synthetic reference spectra composed of Gaussian functions which give an accurate reproduction of the experimental references, and can easily be generated by computer for ease of use in other laboratories.
- Research Organization:
- Univ. of California, Irvine, CA (US)
- OSTI ID:
- 20017288
- Journal Information:
- Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory, Journal Name: Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory Journal Issue: 8 Vol. 104; ISSN 1089-5639; ISSN JPCAFH
- Country of Publication:
- United States
- Language:
- English
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