Fingerprinting fragments of fragile interstellar molecules: dissociation chemistry of pyridine and benzonitrile revealed by infrared spectroscopy and theory

Faraday Discuss., 2023, 245,221-244
DOI: 10.1039/D3FD00015J, Paper
Open Access Open Access
Creative Commons Licence  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Daniël B. Rap, Aude Simon, Kim Steenbakkers, Johanna G. M. Schrauwen, Britta Redlich, Sandra Brünken
Fragmentation pathways of benzonitrile and pyridine are elucidated using cryogenic infrared ion spectroscopy, quantum-chemical calculations and molecular dynamics simulations.
The content of this RSS Feed (c) The Royal Society of Chemistry

A systematic mechanistic survey on the reactions between OH radical and CH3OH on ice

Faraday Discuss., 2023, 245,508-518
DOI: 10.1039/D3FD00033H, Paper
Open Access Open Access
W. M. C. Sameera, Avon P. Jayaweera, Atsuki Ishibashi, Hiroshi Hidaka, Yasuhiro Oba, Naoki Watanabe
Our systematic computational study suggests that the nature of the binding site or the reaction site has a significant effect on the computed binding energies or reaction barriers.
The content of this RSS Feed (c) The Royal Society of Chemistry

Kinetics of CN (v = 1) reactions with butadiene isomers at low temperature by cw-cavity ring-down in a pulsed Laval flow with theoretical modelling of rates and entrance channel branching

Faraday Discuss., 2023, 245,245-260
DOI: 10.1039/D3FD00029J, Paper
Shameemah Thawoos, Gregory E. Hall, Carlo Cavallotti, Arthur G. Suits
Continuous-wave-cavity ring-down spectroscopy (CRDS) coupled with a pulsed uniform supersonic flow (Laval flow) are used to measure the reaction kinetics of the reaction of CN (v = 1) with 1,3- and 1,2-butadiene isomers at low temperature.
The content of this RSS Feed (c) The Royal Society of Chemistry

Hunting for interstellar molecules: rotational spectra of reactive species

Faraday Discuss., 2023, 245,309-326
DOI: 10.1039/D3FD00052D, Paper
Open Access Open Access
Cristina Puzzarini, Silvia Alessandrini, Luca Bizzocchi, Mattia Melosso
Flash vacuum pyrolysis or DC discharge are exploited for the production of unstable/reactive species. A strategy relying on the interplay of experiment and theory is presented, which ultimately leads to line catalogs for astronomical searches.
The content of this RSS Feed (c) The Royal Society of Chemistry

Thermal behavior of astrophysical amorphous molecular ices

Faraday Discuss., 2023, 245,467-487
DOI: 10.1039/D3FD00048F, Paper
Murthy S. Gudipati, Benjamin Fleury, Robert Wagner, Bryana L. Henderson, Kathrin Altwegg, Martin Rubin
Cometary ice analogs: amorphous H2O ice can trap other molecules up to ∼30% by number, which are outgassed during ice crystallization (130 K to 150 K). Beyond 160 K, crystalline ice sublimes with only a minor fraction (<1%) of other molecules with it.
The content of this RSS Feed (c) The Royal Society of Chemistry

Preferential destruction of NH2-bearing complex interstellar molecules via gas-phase proton-transfer reactions

Faraday Discuss., 2023, 245,541-568
DOI: 10.1039/D3FD00014A, Paper
Robin T. Garrod, Eric Herbst
Destruction of large, interstellar organic molecules with high proton affinities is amplified due to proton transfer from NH4+. Chemical kinetic models indicate a strong destructive effect on NH2-bearing species, including methylamine and glycine.
The content of this RSS Feed (c) The Royal Society of Chemistry

Vacuum UV photodesorption of organics in the interstellar medium: an experimental study of formic acid HCOOH and methyl formate HCOOCH3-containing ices

Faraday Discuss., 2023, 245,488-507
DOI: 10.1039/D3FD00004D, Paper
Mathieu Bertin, Romain Basalgète, Antonio J. Ocaña, Géraldine Féraud, Claire Romanzin, Laurent Philippe, Xavier Michaut, Jean-Hugues Fillion
The UV photodesorption of neutrals from ices comprising HCOOH and HCOOCH3 is studied. Photodesorption yields are provided from a variety of different desorbing species, highlighting the preponderant role played by photodissociation of the organics.
The content of this RSS Feed (c) The Royal Society of Chemistry

Searches for bridged bicyclic molecules in space—norbornadiene and its cyano derivatives

Faraday Discuss., 2023, 245,284-297
DOI: 10.1039/D3FD00016H, Paper
Open Access Open Access
Marie-Aline Martin-Drumel, Jean-Thibaut Spaniol, Helen Hölzel, Marcelino Agúndez, Jose Cernicharo, Kasper Moth-Poulsen, Ugo Jacovella
Laboratory rotational spectra of norbornadiene and its cyano derivatives were recorded using chirped-pulse millimetre-wave spectroscopy. These molecules were then searched for in the starless core TMC-1 using the QUIJOTE line survey.
The content of this RSS Feed (c) The Royal Society of Chemistry

Experimental radiative cooling rates of a polycyclic aromatic hydrocarbon cation

Faraday Discuss., 2023, 245,352-367
DOI: 10.1039/D3FD00005B, Paper
Open Access Open Access
Creative Commons Licence  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
José E. Navarro Navarrete, James N. Bull, Henrik Cederquist, Suvasthika Indrajith, MingChao Ji, Henning T. Schmidt, Henning Zettergren, Boxing Zhu, Mark H. Stockett
The radiative cooling rate of cationic 1-cyanonaphthalene is determined from storage ring experiments and shown to be consistent with recurrent fluorescence. The rapid cooling helps explain the abundance of the neutral molecule in molecular clouds.
The content of this RSS Feed (c) The Royal Society of Chemistry

New interstellar laboratories in the molecular ring

Faraday Discuss., 2023, 245,138-163
DOI: 10.1039/D3FD00003F, Paper
Olivia H. Wilkins, Geoffrey A. Blake
The so-called molecular ring has been mostly absent from astrochemical observations despite containing the bulk of the Milky Way’s molecular matter. A pilot survey of 11 molecular-ring giant molecular clouds with ALMA reveals new chemical stockrooms.
The content of this RSS Feed (c) The Royal Society of Chemistry