SURFRESIDE2: An ultrahigh vacuum system for the investigation of surface reaction routes of interstellar interest

Article / Letter to editorSterrewach

Mid-infrared spectroscopic signatures of dibenzopyrene cations: the effect of symmetry on PAH IR spectroscopy

Interstellar matter and star formatio

Acetylene v1 + v5 (Pi_u) <- v4 (Pi_g) hot band revisited

Laboratory astrophysics and astrochemistr

Laboratory gas-phase detection of the cyclopropenyl cation (c-C3H3)

The cyclopropenyl cation (c-C3H3 +) is the smallest aromatic hydrocarbon molecule and considered to be a pivotal intermediate in ion–molecule reactions in space. An astronomical identification has been prohibited so far, because of a lack of gas-phase data. Here we report the first high resolution infrared laboratory gas-phase spectrum of the ν4 (C–H asymmetric stretching) fundamental band of c-C3H3 +. The c-C3H3 + cations are generated in supersonically expanding planar plasma by discharging a propyne/helium gas pulse, yielding a rotational temperature of ∼35 K. The absorption spectrum is recorded in the 3.19μm region using sensitive continuous-wave cavity ring-down spectroscopy. The analysis of about 130 ro-vibrational transitions results in precise spectroscopic parameters. These constants allow for an accurate comparison with high-level theoretical predictions, and provide the relevant information needed to search for this astrochemically relevant carbo-cation in space.NWO-VICILaboratory astrophysics and astrochemistr

13C Mono-Substituted Isotopologues of Propyne (H_3CCCH): Investigating the Acetylenic CH Stretch Perturbation

Laboratory astrophysics and astrochemistr

The electronic spectrum of the Cs-C11H3 radical

The electronic gas-phase absorption spectrum of the bent carbon-chain radical, H

Similarities and dissimilarities in the fragmentation of polycyclic aromatic hydrocarbon cations: a case study involving three dibenzopyrene isomers

Laboratory astrophysics and astrochemistr

Infrared spectra of complex organic molecules in astronomically relevant ice mixtures. V.: Methyl cyanide (acetonitrile)

Laboratory astrophysics and astrochemistr

Novel approach to distinguish between vacuum UV-induced ice photodesorption and photoconversion. Investigation of CH_4, CH_3OH, and CH_3CN

Laboratory astrophysics and astrochemistr