The OH- and O3- initiated oxidations of isoprene, which is one of the primary volatile organic compounds produced by vegetation, are a major source of atmospheric formaldehyde and other oxygenated organics, yet little quantitative IR data exists for isoprene. We thus report absorption coefficients and integrated band intensities for isoprene in the 600 - 6500 cm-1 region. The pressure-broadened (1 atmosphere N2) spectra were recorded at 278, 298 and 323 K in a 19.96 cm path length cell at 0.112 cm-1 resolution, using a Bruker 66V FTIR. Composite spectra are derived from a minimum of seven pressures at each temperature.
Revised: December 29, 2014 |
Published: November 19, 2014
Citation
Brauer C.S., T.A. Blake, A.B. Guenther, S.W. Sharpe, R.L. Sams, and T.J. Johnson. 2014.Quantitative infrared absorption cross sections of isoprene for atmospheric measurements.Atmospheric Measurement Techniques 7, no. 11:3839-3847.PNNL-SA-101735.doi:10.5194/amt-7-3839-2014