The vacuum ultraviolet pulsed field ionization-photoelectron and photoionization efficiency spectra of NCCN have been measured in the energy region of 13.25–17.75 eV. The analyses of these spectra have provided accurate ionization energy (IE) values of , , , and for the formation of in the , , , and states, respectively. The ionization energy value determined here indicates that the origin of the state lies lower in energy by 25 meV than previously reported. A set of spectroscopic parameters for has been calculated using high level ab initio calculations. The experimental spectra are found to consist of ionizing transitions populating the vibronic levels of , which consist of pure vibronic progressions, combination modes involving the symmetric CN stretch, the CC stretch, and even quanta of the antisymmetric CN stretch, and bending vibrations. These bands are identified with the guidance of the present ab initio calculations.
A vacuum ultraviolet pulsed field ionization-photoelectron study of cyanogen cation in the energy range of 13.2–15.9 eVa)
M. Hochlaf, Tomas Baer, X.-M. Qian, C. Y. Ng; A vacuum ultraviolet pulsed field ionization-photoelectron study of cyanogen cation in the energy range of 13.2–15.9 eV. J. Chem. Phys. 8 October 2005; 123 (14): 144302. https://doi.org/10.1063/1.2037607
Download citation file: