Accession Number:

ADA244496

Title:

Spectroscopy of Reaction Intermediates in Nitramine Decomposition and Combustion

Descriptive Note:

Final rept. 20 apr 88-19 Apr 91,

Corporate Author:

NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD

Personal Author(s):

Report Date:

1991-06-20

Pagination or Media Count:

31.0

Abstract:

The infrared spectra of a number of free radicals and molecular ions which are expected to be important in nitramine decomposition and combustion have been obtained in solid neon. The molecular ion studies resulted in the first infrared spectral detection of dimer ions in a non-interactive environment. The ions chosen for study are important in the lower ionosphere and in combustion and high energy processes involving carbon- and nitrogen- containing materials. Other studies used monomethylnitramine MMN as a model compound for elucidating the chemistry of nitramine decomposition. The infrared spectrum of MMN isolated in solid neon was obtained using a manifold designed for matrix isolation sampling of low vapor pressure materials. Supporting evidence was obtained for a mechanism recently Proposed by Melius for water- catalyzed nitramine decomposition. The photodecomposition of matrix-isolated MMN was studied. Evidence was obtained supporting initial detachment of NO2 and cage recombination to form the nitrite in a solid environment. Infrared and near infrared studies of other free radicals are briefly described.

Subject Categories:

  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE