A5014223301- Molecular Spectroscopy and Structure
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Advanced Chemical Physics Studies
- Astrophysics and Star Formation Studies
- Analytical Chemistry and Chromatography
- Astronomical Observations and Instrumentation
- Chemical Reactions and Isotopes
- Advanced Chemical Sensor Technologies
- Molecular spectroscopy and chirality
- Atomic and Subatomic Physics Research
- Gyrotron and Vacuum Electronics Research
- Solid-state spectroscopy and crystallography
- Spectroscopy and Quantum Chemical Studies
- Chemical Thermodynamics and Molecular Structure
- Acoustic Wave Resonator Technologies
- Inorganic Fluorides and Related Compounds
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Gas Sensing Nanomaterials and Sensors
- Eicosanoids and Hypertension Pharmacology
- Thermodynamic properties of mixtures
- Atmospheric chemistry and aerosols
- Terahertz technology and applications
- Various Chemistry Research Topics
Laboratoire de Physique des Lasers, Atomes et Molécules
2015-2024
Université de Lille
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Interface (United States)
2023
Institute of Radio Astronomy
2004-2021
Université Paris Cité
2017-2021
Laboratoire de Physique des Interfaces et des Couches Minces
2019-2021
Adam Mickiewicz University in Poznań
2019-2021
Laboratoire Interuniversitaire des Systèmes Atmosphériques
2017-2019
Technische Universität Braunschweig
2019
N-methylformamide, CH3NHCHO, may be an important molecule for interstellar pre-biotic chemistry because it contains a peptide bond. The rotational spectrum of the most stable trans conformer CH3NHCHO is complicated by strong torsion-rotation interaction due to low barrier methyl torsion. We use two absorption spectrometers in Kharkiv and Lille measure spectra over 45--630 GHz. analysis carried out using Rho-axis method RAM36 code. search N-methylformamide toward hot molecular core Sgr B2(N2)...
Abstract We report the detection of interstellar methoxymethanol (CH 3 OCH 2 OH) in Atacama Large Millimeter/submillimeter Array (ALMA) Bands 6 and 7 toward MM1 core high-mass star-forming region NGC 6334I at ∼0.″1–1″ spatial resolution. A column density 4(2) × 10 18 cm −2 T ex = 200 K is derived MM1, ∼34 times less abundant than methanol OH), significantly higher predicted by astrochemical models. Probable formation destruction pathways are discussed, primarily through reaction CH OH...
Using the Yebes 40m and IRAM 30m radiotelescopes, we detected two series of harmonically related lines in space that can be fitted to a symmetric rotor. The have been seen towards cold dense cores TMC-1, L483, L1527, L1544. High level theory
Two new spectrometers based on the direct digital frequency synthesizers are presented. The instruments characterized by a high rate (up to 100 GHz/hr) of molecular spectrum recording with accuracy measuring transition frequencies (the measurement error for isolated spectral lines lies within ±0.002 MHz provided that signal-to-noise ratio is 50 or greater). Frequency modulation radiation source guarantees stability and determinancy frequency-modulated signal parameters makes it possible...
Context. Formamide is the simplest bearer of peptide bond detected in interstellar medium (ISM).
We report on the tentative detection of trans ethyl methyl ether (tEME), t-CH3CH2OCH3, through identification a large number rotational lines from each one spin states molecule towards Orion KL. also search for gauche-trans-n-propanol, Gt-n-CH3CH2CH2OH, an isomer tEME in same source. have identified both species IRAM 30 m line survey and ALMA Science Verification data. obtained maps to establish spatial distribution these species. Whereas mainly arises compact ridge component Orion,...
Context. Astronomical survey of interstellar molecular clouds needs a previous analysis the spectra in microwave and sub-mm energy range to be able identify them. We obtained very accurate spectroscopic constants comprehensive laboratory rotational spectra. These can used predict transition frequencies that were not measured precisely.
Context. Recent experimental works have studied the possible formation of hydroxyacetonitrile on astrophysical grains. It was formed from hydrogen cyanide (HCN) and formaldehyde (H 2 CO) in presence water under interstellar medium conditions. Because these precursor molecules are abundant, is an excellent target for detection. Aims. Previous studies rotational spectra were limited to 40 GHz, resulting inaccurate line list when predicted up millimeter-wave range. We measured analyzed its 600...
Context . Nitriles constitute almost 20% of the molecules observed in interstellar medium, whereas only one dinitrile and isocyanonitrile compound have been detected up to now. The lack detections such compounds may be partially explained by accurate spectroscopic data on their rotational spectra. Aims Two small seven-atom dinitriles, malononitrile NCCH 2 CN isocyanoacetonitrile NC, were chosen as target species for this study. For goal study is systematize all previous measurements, extend...
Context. Dimethyl ether is one of the most abundant complex organic molecules (COMs) in star-forming regions. Like other COMs, its formation process not yet clearly established, but relative abundances deuterated isotopomers may provide crucial hints studying chemistry and tracing source history. The mono-deuterated species (CHDOCH) still a relatively light molecule compared to COMs. Its spectrum intense THz domain 100–150 K temperature regime, inner parts low-mass region. Therefore, it...
Methoxymethanol, CH<sub>3</sub>OCH<sub>2</sub>OH is a very interesting candidate for detection in the interstellar medium since it can be formed recombination reaction between two radicals considered as intermediates methanol formation: CH<sub>3</sub>O (already detected ISM) and CH<sub>2</sub>OH.
Abstract We use both chirped-pulse Fourier transform and frequency-modulated absorption spectroscopy to study the rotational spectrum of 2-methoxyethanol (CH 3 OCH 2 CH OH) in several frequency regions ranging from 8.7 500 GHz. The resulting parameters permitted a search for this molecule Atacama Large Millimeter/submillimeter Array (ALMA) observations toward massive protocluster NGC 6334I, as well source B low-mass protostellar system IRAS 16293−2422. A total 25 transitions are observed...
Context. Ethyl cyanide is an abundant molecule in hot molecular clouds. Its rotational spectrum very dense and several hundreds of transitions within the ground state have been identified clouds 40-900 GHz frequency range. Lines from 13C isotopically substituted ethyl were Orion.
Based on new measurements carried out in the laboratory from 0.77 to 1.2 THz and a line-frequency analysis of these data, along with previously published we build line list for HCOOCH2D that leads its first detection Orion KL nebula. The observed lines, both space laboratory, involve cis D-in-plane trans D-out-of-plane conformations two tunneling states arising large-amplitude motion connecting configurations. model used position calculation accounts conformations, as well motion.
Context. Methylamine (CH3NH2) is the simplest primary alkylamine that has been detected in interstellar medium. The molecule relatively light, with 50 K Boltzmann peak appearing near 800 GHz. However, reliable predictions for its rotational spectrum are available only up to 500 Spectroscopic analyses have complicated by two large-amplitude motions: internal rotation of methyl top and inversion amino group.
Context. An astronomical survey of interstellar molecular clouds needs a previous analysis the spectra in microwave and sub-mm energy range organic molecules to be able identify them. We obtained very accurate spectroscopic constants comprehensive laboratory rotational spectra. These can used predict transitions frequencies precisely that were not measured laboratory.