Contribution Contributed Talk
Submillimeter wave spectroscopy of HOCO+ and DOCO+
Protonated CO$_2$ is a molecule of astrophysical interest because it’s an indirect tracer of carbon dioxide. Being CO$_2$ a main constituent of interstellar ices, its chemistry provides important information on the interplay of gas- and solid-phase chemistry in space.
Bogey and coworkers measured in the late 80s the rotational spectra of HOCO$^+$ and DOCO$^+$ up to 420 GHz (1,2).
We have extended the frequency coverage up to 1 THz, obtaining improved rotational constants and centrifugal distortion constants. The ions were produced in a newly built cryogenic discharge cell in the CAS Laboratories via magnetically enhanced glow discharge of a mixture of CO$_2$, H$_2$(D$_2$) and Argon. Our results on HOCO$^+$ and DOCO$^+$ will be presented, as well as the spectrometer. Future perspectives will also be discussed.
 M. Bogey, C. Demuynck, , J. Destombes, J. Chem. Phys. 84, 10, 1986
 M. Bogey, C. Demuynck, , J. Destombes, A. Krupnov, J. Mol. Struct. 190, 465-474, 1988