science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: nitrous acid					Other Names: HNO2

Formula: HONO						CAS-No.: 7782-77-6

Study: UV absorption cross sections

                
Authors: A. Bongartz, J. Kames, F. Welter, U. Schurath

Title: Near-uv absorption cross sections and trans/cis equilibrium of nitrous acid

Journal/Source: J. Phys. Chem., 95, 1076-1082, (1991); DOI: 10.1021/j100156a012


Data: table, diagram

Energy/Wavelength range: 300 - 400 nm

Resolution: 

Temperature: 298 K

Temperature dependence: no

Pressure/Concentration: 

Phase: gas

pH:


Comments: The absorption spectrum of gaseous nitrous acid has been measured in the 300-400 nm range. Absolute
cross sections were determined by a combination of gas-phase and wet chemical analysis. 
The integrated band area of the n-pi* transition yields an oscillator strength f = (8.90 ± 0.36) x 10^-4, less than the reported
liquid phase value of 2 x 10^-3.
The cross sections must be corrected by a factor of 0.855 (Bongartz et al., j. Atmos. Chem., 18, (1994), 149-169.

Author to whom correspondence should be addressed: (e-mail address):