Crossed molecular beam studies of chemiluminescent reactions. [F/sub 2/ + I/sub 2/; NO + O/sub 3/; F/sub 2/ + Br/sub 2/; F/sub 2/ + ICl]

Technical Report · Tue Apr 01 04:00:00 EST 1980

OSTI ID:5296071

Kahler, C C

The chemiluminescent bimolecular halogen-halogen reactions of F/sub 2/ with I/sub 2/, Br/sub 2/, and ICl, were studied by the crossed molecular beam technique. The observed reaction thresholds of 4.2 and 5.9 kcal/mole for I/sub 2/ + F/sub 2/ and ICl + F/sub 2/, respectively, are the same as the threshold energies for production of the stable trihalogens I/sub 2/F and ClIF. A threshold of 11.3 kcal/mole was found for Br/sub 2/ + F/sub 2/; no threshold for Br/sub 2/F has been previously reported. Also described is a crossed molecular beam study of the chemiluminescent reaction of NO + O/sub 3/ ..-->.. NO/sub 2/* + O/sub 2/. The cross section was found to increase with increasing collision energy. The reaction threshold was 2.1 kcal/mole. The chemiluminescence was found to increase with increasing NO temperature. This can be explained by assuming the cross section varies as E/sub rot//sup 1.4/ where E/sub rot/ is the average rotational energy of the NO beam. The chemiluminescence enhancement did not have the dependence on the increased NO(/sup 2/PI/sub 3/2/) population as suggested. The emission curve shifted to the blue as the collision energy increased.

• Research Organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5296071
• Report Number(s): LBL-10545
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
BEAMS
BROMINE
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMILUMINESCENCE
CHLORIDES
CHLORINE COMPOUNDS
COLLISIONS
COMPUTER CODES
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTRA
FLUORESCENCE
FLUORINE
HALIDES
HALOGEN COMPOUNDS
HALOGENS
IODINE
IODINE CHLORIDES
IODINE COMPOUNDS
KINETICS
LASER RADIATION
LUMINESCENCE
MOLECULAR BEAMS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
OZONE
RADIATIONS
REACTION KINETICS
SPECTRA