Vibronic spectra of the ozonide ion in the matrix-isolated M+O3− species

Abstract

Matrix reactions of alkali metal atoms and ozone molecules at high dilution in inert gases produced a clear yellow film during condensation at 10–22 K on a sapphire plate which yielded vibronic spectra of the M⁺O₃⁻ species. Best resolution of up to 14 vibronic bands spaced 800–900 cm⁻¹ apart was obtained for the lithium and sodium compounds. These bands formed a strong progression in ν₁′ and the first six bands exhibited the presence of a weaker progression in ν₂′. The band origin was located at 17 730 cm⁻¹ for Li⁺¹⁶O₃⁻ and Li⁺¹⁸O₃⁻ in solid krypton. Harmonic and anharmonic vibrational constants were determined graphically for the excited electronic state.