Accession Number:

AD0272313

Title:

MATRIX ISOLATION OF HIGH TEMPERATURE VAPORS: BORIC OXIDE AND CARBON

Descriptive Note:

Corporate Author:

UNION CARBIDE CORP PARMA OHIO

Personal Author(s):

Report Date:

1962-01-01

Pagination or Media Count:

1.0

Abstract:

The matrix isolation technique was extended to allow molecules which are in equilibrium with solids at high temperatures to be trapped and studied at low temperatures. A beam of the hot vapor issuing from a Knudsen cell or a heated surface is premixed with a large excess of argon or xenon just prior to condensation at 20 K. The method was applied to boric oxide vapor which was vaporized from the liquid at 1400 K. The infrared absorption spectrum of the B2O3 molecule in a solid inert gas matrix was measured between 1280 cm and 13600 cm and compared with the known vapor emission spectrum. Several new bands were found near 1500 cm which led to a considerable alteration in the vibrational assignment and the thermodynamic properties of the gaseous molecule. The infrared spectrum of B2O2 produced by heating boron plus boric oxide isolated in a matrix yielded one absorption band which agreed with the emission spectrum. A general program IBM 7090 was used for the calculation of molecular force constants from assigned fundamental vibrational frequencies. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE