Jean‐Christophe Loison

Evidence for phenylium reactivity under interstellar-relevant conditions

Jean‐Christophe Loison, Corentin Rossi, Nicolas Solem, R. Thissen et autres

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Valence Threshold Photoionization Spectra of C5$_5$H and C5$_5$H2$_2$ Isomers

Ugo Jacovella, Myriam Drissi, Bérenger Gans, Corentin Rossi et autres

species are important intermediates in the formation of large carbonaceous molecules. Mass‐selected threshold photoelectron spectra (TPES) of l‐CH, HCH, and c–CH–CCH were recorded using double‐imaging photoelectron–photoion coincidence spectroscopy. The TPES of l‐CH and c–CH–CCH are reported for the first time. These transient …

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Hydration of Phenylium: Oxonium or Carbenium Ion Formation?

Corentin Rossi, Anne P. Rasmussen, Jean‐Christophe Loison, Bérenger Gans et autres

The hydration of the phenylium ion (C 6 H 5 + ) is investigated to determine whether the most abundant product structure is best described as an oxonium (O‐protonated phenol) or carbenium (ring‐protonated phenol) ion. Using a combination of infrared multiple‐photon dissociation …

fr, dk, nl, it (code pays fourni par la source)

Cover Feature: Hydration of Phenylium: Oxonium or Carbenium Ion Formation? (ChemistryEurope 4/2026)

Corentin Rossi, Anne P. Rasmussen, Jean‐Christophe Loison, Bérenger Gans et autres

The Cover Feature shows how spectral fingerprints can probe atomic rearrangements after a reactive collision. Using phenylium hydration as a case study, U. Jacovella and co-workers reveal in their Research Article (DOI: 10.1002/ceur.70232) whether the additional proton in the phenol-like product binds …

fr, dk, nl, it (code pays fourni par la source)

Simulation of proton radiolysis of H 2 O and O 2 ices with the Nautilus code

Tian-Yu Tu, Valentine Wakelam, Jean‐Christophe Loison, M. Chabot et autres

Context . The radiolysis effect of cosmic rays (CRs) plays an important role in the chemistry of molecular clouds. Cosmic rays can dissociate molecules on dust grains, producing reactive suprathermal species and radicals, which facilitate the formation of large molecules. Aims . …

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Discovery of linear propadienone

G. Esplugues, Jean‐Christophe Loison, M. Agúndez, Germán Molpeceres et autres

We report the first detection in space of propadienone, the linear isomer (l-H 2 C 3 O) of cyclopropenone (c-H 2 C 3 O). We also report the first detection of the isotopologues c-H 2 13 CCCO and c-HDCCCO of c-H 2 …

es, fr (code pays fourni par la source)

The evolution of complex organic molecules during star formation

Pierre Marchand, A. Coutens, Jean‐Christophe Loison, Valentine Wakelam et autres

Complex organic molecules (COMs) are thought to be the precursors of pre-biotic molecules and are observed in many protostellar sources. For this paper we studied the formation of COMs during star formation and their evolution in the midplane of the circumstellar disk …

Dissociative electron attachment to the HNC$_3$ molecule

Elizabeth Aubin, Jean‐Christophe Loison, Mehdi Ayouz, Joshua Forer et autres

Dissociative electron attachment (DEA) to the HNC$_3$ is modeled theoretically using a first-principles approach. In HNC$_3$+$e^-$ collisions, there is a low-energy resonance, which has a repulsive character along the H+NC$_3$ coordinate and becomes a bound electronic state of the HNC$_3^-$ anion near …

Survey of (sub)millimeter water masers in low-mass star-forming regions

Pedro K. Humire, C. Goddi, Gisela N. Ortiz-León, A. Hernández-Gómez et autres

Context. Water masers are common in star-forming regions (SFRs), with the 22.235 GHz transition widely detected in both high- and low-mass protostars. In contrast, (sub)millimeter water maser transitions remain poorly studied, especially in low-mass SFRs, due to atmospheric limitations and a lack …

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The atmosphere of Titan as seen by VLT-ESPRESSO: the first search for minor compounds with Ultra High-Resolution visible spectra on Titan’s atmosphere

Rafael Rianço-Silva, Pedro Machado, G. Tinetti, Zita Martins et autres

The atmosphere of Titan is a unique natural laboratory for the study of atmospheric evolution and photochemistry akin to that of the primitive Earth (1), with a wide array of complex molecules discovered through infrared and sub-mm spectroscopy (2)(3). A recent work …

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Products of Sublimated Ammonium Salts

Jean‐Christophe Loison, Madhusree Roy Chowdhury, Gustavo A. García, Kevin M. Hickson et autres

Ammonium salts are increasingly suspected to play an important role in astrochemistry, as both a reservoir, particularly of sulfur and nitrogen, and a potential source of complex molecules, in spite of the lack of knowledge on their sublimation process and products. We …

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Rate Constants and Product Yields for the C + CH3CHO Reaction at Low Temperatures

Kevin M. Hickson, Jean‐Christophe Loison, Valentine Wakelam

Reactions involving atomic carbon in its ground electronic state, C( 3 P), play an important role in astrochemistry due to high C atom abundance levels. Here we performed a kinetic investigation of the reaction between C( 3 P) and acetaldehyde, CH 3 …

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