Issue 44, 2023

Collision-induced state-changing rate coefficients for cyanogen backbones NCN 3Σ and CNN 3Σ in astrophysical environments

Abstract

We report quantum calculations involving the dynamics of rotational energy-transfer processes, by collision with He atoms in interstellar environments, of the title molecular species which share the presence of the CN backbone and are considered of importance in those environments. The latter structural feature is taken to be especially relevant for prebiotic chemistry and for its possible role in the processing of the heterocyclic rings of RNA and DNA nucleobases in the interstellar space. We carry out ab initio calculations of their interaction potentials with He atoms and further obtain the state-to-state rotationally inelastic cross sections and rate coefficients over the relevant range of temperatures. The similarities and differences between such species and other similar partners which have been already detected are analyzed and discussed for their significance on internal state populations in interstellar space for the two title molecular radicals.

Graphical abstract: Collision-induced state-changing rate coefficients for cyanogen backbones NCN 3Σ− and CNN 3Σ− in astrophysical environments

Supplementary files

Article information

Article type
Paper
Submitted
13 7 2023
Accepted
25 10 2023
First published
25 10 2023
This article is Open Access
Creative Commons BY-NC license

Phys. Chem. Chem. Phys., 2023,25, 30330-30342

Collision-induced state-changing rate coefficients for cyanogen backbones NCN 3Σ and CNN 3Σ in astrophysical environments

L. González-Sánchez, E. Yurtsever, J. A. de la Fuente, C. Sanz-Sanz, R. Wester and F. A. Gianturco, Phys. Chem. Chem. Phys., 2023, 25, 30330 DOI: 10.1039/D3CP03316C

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