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Infrared Absorption Cross-Section Measurements for Nitrous Acid (HONO) at Room Temperature

Barney, William S. and Wingen, Lisa M. and Lakin, Matthew J. and Brauers, Theo and Stutz, Jochen and Finlayson-Pitts, Barbara J. (2000) Infrared Absorption Cross-Section Measurements for Nitrous Acid (HONO) at Room Temperature. Journal of Physical Chemistry A, 104 (8). pp. 1692-1699. ISSN 1089-5639. doi:10.1021/jp9930503.

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Infrared absorption 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_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_2 at 294−297 K. We report both Q-branch intensities and integrated absorbances for the HONO modes trans-ν_3 (1263 cm^(-1)), cis-ν_4 (852 cm^(-1)), and trans-ν_4 (790 cm^(-1)). For trans-ν_3 and cis-ν_4 we also include synthetic reference spectra composed of Gaussian functions which give an accurate reproduction of our experimental references, and can easily be generated by computer for ease of use in other laboratories.

Item Type:Article
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Finlayson-Pitts, Barbara J.0000-0003-4650-168X
Additional Information:© 2000 American Chemical Society. Received: August 26, 1999; In Final Form: December 14, 1999. Publication Date (Web): February 5, 2000. We gratefully acknowledge M. Ezell and N. Saliba for experimental assistance, W. P. L. Carter, T. Wallington, and M. Hurley for helpful discussions, L. Moritz and J. Meyer for equipment fabrication, and the California Air Resources Board (Contract No. 97-311) for financial support.
Funding AgencyGrant Number
California Air Resources Board97-311
Issue or Number:8
Record Number:CaltechAUTHORS:20170419-100513863
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Official Citation:Infrared Absorption Cross-Section Measurements for Nitrous Acid (HONO) at Room Temperature William S. Barney, Lisa M. Wingen, Matthew J. Lakin, Theo Brauers, Jochen Stutz, and Barbara J. Finlayson-Pitts The Journal of Physical Chemistry A 2000 104 (8), 1692-1699 DOI: 10.1021/jp9930503
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76671
Deposited By: Tony Diaz
Deposited On:19 Apr 2017 17:12
Last Modified:15 Nov 2021 17:01

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