Integrated intensities of OH vibrational overtones in alcohols

Intensities for several OH vibrational overtone bands have been measured for vapor-phase methanol, ethanol, and isopropanol. The trends in the intensities as a function of excitation level have been modeled by two empirical approaches, yielding intensity predictions for the higher overtone transitions, up to 7ν(OH). These methods were also applied to recent HNO₃ overtone measurements, resulting in new intensity predictions for higher, photochemically active overtone bands, which are compared with ab initio estimates.