Infrared fluorescence from NO/sub 2/ excited at 400--500 nm

Journal Article · Mon May 01 04:00:00 EDT 1989 · J. Chem. Phys.; (United States)

OSTI ID:6468162

McAndrew, J J.F.; Preses, J M; Weston, Jr, R E; Flynn, G W

NO/sub 2/ has been electronically excited to the /sup 2/B/sub 2///sup 2/B/sub 1/ states, using pulsed dye laser radiation at 400--500 nm. Strong mixing of the electronically excited state with the ground electronic state (/sup 2/A/sub 1/) leads to highly vibrationally excited NO/sub 2/(/sup 2/A/sub 1/), from which infrared emission has been observed. The time dependence of the IR fluorescence at several wavelengths has been observed, and quenching rate constants for NO/sub 2/ and other gases have been measured. In addition to IR fluorescence at wavelengths identifiable as vibrational transitions (3.0--4.0, 6.1--6.8, 7.4--8.5, and 10.0--14.0 ..mu..m), emission at wavelengths <3.0 ..mu..m has been observed and attributed to a transition with electronic character. The emission observed in these experiments has been compared with that of chemiluminescent NO/sub 2/ produced in the O+NO and O/sub 3/+NO reactions.

• Research Organization: Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 6468162
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 90:9; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical &amp; Physicochemical Properties
500200* -- Environment
Atmospheric-- Chemicals Monitoring &amp; Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORING
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMILUMINESCENCE
DETECTION
EARTH ATMOSPHERE
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUORESCENCE
INFRARED SPECTRA
LUMINESCENCE
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
OZONE
SPECTRA
TROPOSPHERE
VIBRATIONAL STATES