High resolution FTIR spectrum of the ν1 band of DCOOD

Abstract

Accurate spectral information on formic acid has wide application to radioastronomy since it was the first organic acid found in interstellar space. In this work, the infrared absorption spectrum of the ν1 band of deuterated formic acid (DCOOD) has been measured on a Bomem DA3.002 Fourier transform spectrometer in the wavenumber region 2560-2690 cm-1 with a resolution of 0.004 cm-1. A total of 292 infrared transitions have been assigned in this hybrid type A and B band centred at 2631.8736±0.0004 cm-1. The assigned transitions have been fitted to give a set of eight rovibrational constants for the ν1 = 1 state with a standard deviation of 0.00078 cm-1.