TY  - JOUR
AU  - Loru, Donatella
AU  - Steber, Amanda
AU  - Schnell, Melanie
AU  - Rijs, Anouk
AU  - Rap, Daniel Benjamin
AU  - Lemmens, Alexander
AU  - Thunnissen, Johannes M. M.
TI  - New potential candidates for astronomical searches discovered in the electrical discharge of the PAH naphthalene and acetonitrile
JO  - Journal of molecular spectroscopy
VL  - 386
SN  - 0022-2852
CY  - Orlando, Fla.
PB  - Academic Press
M1  - PUBDB-2021-05142
SP  - 111629
PY  - 2022
AB  - The formation and dissociation mechanisms of polycyclic aromatic hydrocarbons (PAHs) as well as their reactivity with other interstellar molecules are elusive. In this work, we have investigated the electrical discharge chemistry of the PAH naphthalene and acetonitrile, a molecule known to be present in interstellar environments, using a combination of mass-selective IR-UV ion dip spectroscopy with the free electron laser FELIX in the mid-IR frequency region (550 – 1800 cm<sup>−1</sup>), and quantum chemical calculations. In addition to the species known to be produced in the electrical discharge of pure naphthalene, –CH<sub>3</sub> and –CN substituted unsaturated hydrocarbons have been identified. Most of them, in particular those containing a nitrogen atom in the molecular framework, such as benzo[7]annulene‐6‐carbonitrile, have a substantial dipole moment and, therefore, can be considered as potential candidates for astronomical searches. Among the species observed, the two isomers 1- and 2-cyanonaphthalene, which have been recently detected in the TMC-1, have been unambiguously identified in our experiment, thus highlighting the use of electrical discharge sources as a valuable tool to produce astronomically relevant species.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000797332600003
DO  - DOI:10.1016/j.jms.2022.111629
UR  - https://bib-pubdb1.desy.de/record/472643
ER  -