Argon cluster-mediated isolation and vibrational spectra of peroxy and nominally D-3h isomers of CO3- and NO3-

作者：Relph Rachael A^*; Bopp Joseph C; Johnson Mark A; Viggiano A A

来源：Journal of Chemical Physics, 2008, 129(6): 064305.

DOI：10.1063/1.2958223

Vibrational predissociation spectra are reported for two isomeric forms of the gas-phase ions, CO3- and NO3-. The peroxy forms, (OOCO- and OONO-) were isolated using an Ar-mediated synthetic scheme involving exchange of CO and NO for the more weakly bound Ar ligands in O-2(-)center dot Ar-m clusters, while the forms based on a central heteroatom (CO3- and NO3-) were generated by electron impact on CO2 and HNO3 vapor. The simple two-band spectrum of OOCO- indicates that it is best described as the O-2(-)center dot CO ion-molecule complex, whereas the covalently bound CO3- form yields a much more complicated vibrational spectrum with bands extending out to 4000 cm(-1). In contrast, the NO3- ion yields a simple spectrum with only one transition as expected for the antisymmetric NO stretching fundamental of a species with D-3h structure. The spectrum of the peroxynitrite isomer, OONO-, displays intermediate complexity that can be largely understood in the context of fundamentals associated with its cis and trans structures previously characterized in an Ar matrix.

• 出版日期2008-8-14