Infra-red spectra of N2O adsorbed on evaporated films of NaCl, NaBr and NaI

Abstract

Infra-red spectra of N₂O adsorbed on high-surface area films of evaporated NaCl, NaBr and NaI have been investigated at different temperatures and surface coverages. The ν₃ vibration appeared always as a sharp strong band with an accompanying very weak absorption, visible at lower surface coverages only. The ν₁ and ν₂ absorptions appeared as multiplets. The relative intensities of their components depended strongly on surface coverage, and often there was a correlation in their behaviour on adsorption and desorption. The spectra have been interpreted in terms of the existence of different adsorption sites on the surface.