Measurement of absolute absorption cross sections for nitrous acid (HONO) in the near-infrared region by the continuous wave cavity ring-down spectroscopy (cw-CRDS) technique coupled to laser photolysis

Chaithanya Jain, Pranay Morajkar, Coralie Schoemaecker, B. Viskolcz, Christa Fittschen

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Absolute absorption cross sections for selected lines of the OH stretch overtone 2ν1 of the cis-isomer of nitrous acid HONO have been measured in the range 6623.6-6645.6 cm-1 using the continuous wave cavity ring-down spectroscopy (cw-CRDS) technique. HONO has been generated by two different, complementary methods: in the first method, HONO has been produced by pulsed photolysis of H2O2/NO mixture at 248 nm, and in the second method HONO has been produced in a continuous manner by flowing humidified N2 over 5.2 M HCl and 0.5 M NaNO2 solutions. Laser photolysis synchronized with the cw-CRDS technique has been used to measure the absorption spectrum of HONO produced in the first method, and a simple cw-CRDS technique has been used in the second method. The first method, very time-consuming, allows for an absolute calibration of the absorption spectrum by comparison with the well-known HO2 absorption cross section, while the second method is much faster and leads to a better signal-to-noise ratio. The strongest line in this wavelength range has been found at 6642.51 cm-1 with σ = (5.8 ± 2.2) × 10-21 cm2.

Original languageEnglish
Pages (from-to)10720-10728
Number of pages9
JournalJournal of Physical Chemistry A
Volume115
Issue number39
DOIs
Publication statusPublished - Oct 6 2011

Fingerprint

Nitrous Acid
nitrous acid
Photolysis
absorption cross sections
continuous radiation
photolysis
Spectroscopy
Infrared radiation
cavities
Lasers
Absorption spectra
rings
spectroscopy
lasers
absorption spectra
Isomers
Signal to noise ratio
signal to noise ratios
isomers
Calibration

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Measurement of absolute absorption cross sections for nitrous acid (HONO) in the near-infrared region by the continuous wave cavity ring-down spectroscopy (cw-CRDS) technique coupled to laser photolysis. / Jain, Chaithanya; Morajkar, Pranay; Schoemaecker, Coralie; Viskolcz, B.; Fittschen, Christa.

In: Journal of Physical Chemistry A, Vol. 115, No. 39, 06.10.2011, p. 10720-10728.

Research output: Contribution to journalArticle

@article{b451491c0cc5443096efa45171edac24,
title = "Measurement of absolute absorption cross sections for nitrous acid (HONO) in the near-infrared region by the continuous wave cavity ring-down spectroscopy (cw-CRDS) technique coupled to laser photolysis",
abstract = "Absolute absorption cross sections for selected lines of the OH stretch overtone 2ν1 of the cis-isomer of nitrous acid HONO have been measured in the range 6623.6-6645.6 cm-1 using the continuous wave cavity ring-down spectroscopy (cw-CRDS) technique. HONO has been generated by two different, complementary methods: in the first method, HONO has been produced by pulsed photolysis of H2O2/NO mixture at 248 nm, and in the second method HONO has been produced in a continuous manner by flowing humidified N2 over 5.2 M HCl and 0.5 M NaNO2 solutions. Laser photolysis synchronized with the cw-CRDS technique has been used to measure the absorption spectrum of HONO produced in the first method, and a simple cw-CRDS technique has been used in the second method. The first method, very time-consuming, allows for an absolute calibration of the absorption spectrum by comparison with the well-known HO2 absorption cross section, while the second method is much faster and leads to a better signal-to-noise ratio. The strongest line in this wavelength range has been found at 6642.51 cm-1 with σ = (5.8 ± 2.2) × 10-21 cm2.",
author = "Chaithanya Jain and Pranay Morajkar and Coralie Schoemaecker and B. Viskolcz and Christa Fittschen",
year = "2011",
month = "10",
day = "6",
doi = "10.1021/jp203001y",
language = "English",
volume = "115",
pages = "10720--10728",
journal = "Journal of Physical Chemistry A",
issn = "1089-5639",
publisher = "American Chemical Society",
number = "39",

}

TY - JOUR

T1 - Measurement of absolute absorption cross sections for nitrous acid (HONO) in the near-infrared region by the continuous wave cavity ring-down spectroscopy (cw-CRDS) technique coupled to laser photolysis

AU - Jain, Chaithanya

AU - Morajkar, Pranay

AU - Schoemaecker, Coralie

AU - Viskolcz, B.

AU - Fittschen, Christa

PY - 2011/10/6

Y1 - 2011/10/6

N2 - Absolute absorption cross sections for selected lines of the OH stretch overtone 2ν1 of the cis-isomer of nitrous acid HONO have been measured in the range 6623.6-6645.6 cm-1 using the continuous wave cavity ring-down spectroscopy (cw-CRDS) technique. HONO has been generated by two different, complementary methods: in the first method, HONO has been produced by pulsed photolysis of H2O2/NO mixture at 248 nm, and in the second method HONO has been produced in a continuous manner by flowing humidified N2 over 5.2 M HCl and 0.5 M NaNO2 solutions. Laser photolysis synchronized with the cw-CRDS technique has been used to measure the absorption spectrum of HONO produced in the first method, and a simple cw-CRDS technique has been used in the second method. The first method, very time-consuming, allows for an absolute calibration of the absorption spectrum by comparison with the well-known HO2 absorption cross section, while the second method is much faster and leads to a better signal-to-noise ratio. The strongest line in this wavelength range has been found at 6642.51 cm-1 with σ = (5.8 ± 2.2) × 10-21 cm2.

AB - Absolute absorption cross sections for selected lines of the OH stretch overtone 2ν1 of the cis-isomer of nitrous acid HONO have been measured in the range 6623.6-6645.6 cm-1 using the continuous wave cavity ring-down spectroscopy (cw-CRDS) technique. HONO has been generated by two different, complementary methods: in the first method, HONO has been produced by pulsed photolysis of H2O2/NO mixture at 248 nm, and in the second method HONO has been produced in a continuous manner by flowing humidified N2 over 5.2 M HCl and 0.5 M NaNO2 solutions. Laser photolysis synchronized with the cw-CRDS technique has been used to measure the absorption spectrum of HONO produced in the first method, and a simple cw-CRDS technique has been used in the second method. The first method, very time-consuming, allows for an absolute calibration of the absorption spectrum by comparison with the well-known HO2 absorption cross section, while the second method is much faster and leads to a better signal-to-noise ratio. The strongest line in this wavelength range has been found at 6642.51 cm-1 with σ = (5.8 ± 2.2) × 10-21 cm2.

UR - http://www.scopus.com/inward/record.url?scp=80053409603&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80053409603&partnerID=8YFLogxK

U2 - 10.1021/jp203001y

DO - 10.1021/jp203001y

M3 - Article

VL - 115

SP - 10720

EP - 10728

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

SN - 1089-5639

IS - 39

ER -