High-resolution infrared action spectroscopy of the fundamental vibrational band of CN+

Abstract

Rotational-vibrational transitions of the fundamental vibrational modes of the 12 C 14 N + and 12 C 15 N + cations have been observed for the first time using a cryogenic ion trap apparatus with an action spectroscopy scheme. The lines P (3) to R(3) of 12 C 14 N + and R(1) to R(3) of 12 C 15 N + have been measured, limited by the trap temperature of approximately 4 K and the restricted tuning range of the infrared laser. Spectroscopic parameters are presented for both isotopologues, with band origins at 2000.7587(1) and 1970.321(1) cm −1 , respectively, as well as an isotope independent fit combining the new and the literature data.

(Noble Gas)n‐NC+ Molecular Ions in Noble Gas Matrices: Matrix Infrared Spectra and Electronic Structure Calculations

“…This clear carbon isotopic doublet indicates that the 1933.4 absorption involves a single carbon atom. Similar experiments were done with HC 15 N and with 14/15 mixtures (Figure 4); these revealed a new 1908.6 band for HC 15 N and a doublet at 1933.4 and 1908.6 cm À 1 for the HCN and HC 15 N bands together in the same sample like in Figure 3. This doublet shows that the new 1908.6 band involves a single N atom in a new matrix isolated chemical species.…”

“…[12] The hydrogen cyanides were synthesized by reacting KCN with dilute H 2 SO 4 and drying the HCN gas product by trap to trap distillation. [13] The H 13 CN was made from K 13 CN (99 % 13 C) in the same way, and likewise for HC 15 N (96 % 15 N).…”

Vibrational quenching of CN− in collisions with He and Ar

“…16,[44][45][46][47][48][49] The cyanide cation is also suspected to be important to astrochemical processes but has yet to be detected. The cation's vibrational energies have recently been measured 50 as well as a study has been carried out on its rotational transitions induced by He collisions. 51 Vibrationally inelastic collisions involving the CN − molecular anion with neutral atoms are a type of process rarely studied for such systems.…”

Rotational action spectroscopy of trapped molecular ions

“…The vibrational LIICG method has been successfully applied to many molecular ions 43,44,[75][76][77][78][79] . Typically, this method needs a high-resolution cw IR source for effectively shifting the equilibrium between tagged and untagged species (for this equilibrium, see also section 4.5).…”