Fine Definition of IR Spectra from High Temperature Interactions of U + O2 - Part II.

Abstract : The reactions of UO and UO2 with NO and NO2 have been studied by infrared (IR) spectroscopy using the matrix-isolation technique. Codeposition of vaporized UO and UO2 with NO2 and with NO gases in an argon matrix at 14K resulted in the production of the UO2(+) molecular ion with either a NO2(-) or NO(-) anion. IR absorption frequencies have been measured and interpreted as the stretching modes of a linear UO2(+) ion and a bent (bond angle = 109 degrees) NO2(-) ion. Three different reactions have been observed to yield a UO2(+) cation product: (1) UO2 + NO2; (2) UO2 + NO; and (3) UO + NO2.