Benzonitrile as a Proxy for Benzene in the Cold ISM: Low-temperature Rate Coefficients for CN + C 6 H 6 - Université de Rennes Accéder directement au contenu
Article Dans Une Revue The Astrophysical journal letters Année : 2020

Benzonitrile as a Proxy for Benzene in the Cold ISM: Low-temperature Rate Coefficients for CN + C 6 H 6

Résumé

The low-temperature reaction between CN and benzene (C6H6) is of significant interest in the astrochemical community due to the recent detection of benzonitrile, the first aromatic molecule identified in the interstellar medium (ISM) using radio astronomy. Benzonitrile is suggested to be a low-temperature proxy for benzene, one of the simplest aromatic molecules, which may be a precursor to polycyclic aromatic hydrocarbons. In order to assess the robustness of benzonitrile as a proxy for benzene, low-temperature kinetics measurements are required to confirm whether the reaction remains rapid at the low gas temperatures found in cold dense clouds. Here, we study the C6H6 + CN reaction in the temperature range 15–295 K, using the well-established CRESU technique (a French acronym standing for Reaction Kinetics in Uniform Supersonic Flow) combined with pulsed-laser photolysis-laser-induced fluorescence. We obtain rate coefficients, k(T), in the range (3.6–5.4) × 10−10 cm3 s−1 with no obvious temperature dependence between 15 and 295 K, confirming that the CN + C6H6 reaction remains rapid at temperatures relevant to the cold ISM.
Fichier principal
Vignette du fichier
Cooke et al-2020-Benzonitrile as a Proxy for Benzene in the Cold ISM-Version of Record.pdf (479.23 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02510885 , version 1 (18-03-2020)

Identifiants

Citer

Ilsa R. Cooke, Divita Gupta, Joseph Messinger, Ian R Sims. Benzonitrile as a Proxy for Benzene in the Cold ISM: Low-temperature Rate Coefficients for CN + C 6 H 6. The Astrophysical journal letters, 2020, 891 (2), pp.L41. ⟨10.3847/2041-8213/ab7a9c⟩. ⟨hal-02510885⟩
115 Consultations
178 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More