Amino Acids in the Universe

Guillemin, Jean‐Claude

doi:10.1051/bioconf/20140204002

BIO Web of Conferences

2014

DOI: 10.1051/bioconf/20140204002

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Amino Acids in the Universe

Jean‐Claude Guillemin

Abstract: Abstract.What is the role played by amino acids in the chemistry of the interstellar medium and the emergence of life on the early Earth? Are they really the primary key compounds as free amino acids? Is their presence or absence in the interstellar medium a significant problem? How to get an amino acid sample with an enantiomeric excess on the early Earth or ISM? How to increase the enantiomeric excess to have pure enantiomers? All these questions have received partial answers but they remain open and probabl… Show more

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Cited by 2 publications

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Glycinamide, a Glycine Precursor, Caught in the Gas Phase: A Laser-ablation Jet-cooled Rotational Study

Alonso¹,

Kolesníková²,

Białkowska-Jaworska

et al. 2018

ApJ

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Glycinamide, a glycine precursor, has been successfully generated in the gas phase by laser ablation of its hydrochloride salt, and its microwave spectrum, recorded from 6 to 16 GHz using a Chirped Pulse Fourier Transform Microwave (LA-CP-FTMW) spectrometer, is reported for the first time. The existence of a single structure stabilized by a Na–H ⋯ NtH2 hydrogen bond has been revealed in the supersonic expansion. The complex nuclear quadrupole coupling hyperfine structure due to the two 14N nuclei has been completely resolved and analyzed using a Molecular Beam Fourier Transform Microwave spectrometer in combination with laser ablation (LA-MB-FTMW spectrometer). The first precise data obtained on this glycine precursor could be of great importance for possible future identifications in the interstellar medium.

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Glycinamide, a Glycine Precursor, Caught in the Gas Phase: A Laser-ablation Jet-cooled Rotational Study

Alonso¹,

Kolesníková²,

Białkowska-Jaworska

et al. 2018

ApJ

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Constraints of the Formation and Abundances of Methyl Carbamate, a Glycine Isomer, in Hot Corinos

Sahu

Liu

Das

et al. 2020

ApJ

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Methyl carbamate CH3OC(O)NH2 is an isomer of glycine. Quantum chemical analyses show that methyl carbamate is a more stable isomer than glycine. Because of this, there could be a higher chance for methyl carbamate to exist in the interstellar medium (ISM) as compared to glycine. Despite immense searches, until now glycine has not been detected in the ISM; therefore, it is worthwhile to search its isomer methyl carbamate. In this paper, we present the constraints of methyl carbamate formation under the interstellar conditions. Large complex organic molecules are favorably produced in hot-corino environments of low-mass protostars. We for the first time carried out astrochemical modeling focusing on the formation of methyl carbamate in physical conditions similar to hot-corino objects. Consequently, we examined ALMA archival data for existing spectral line observations toward hot corinos NGC 1333 IRAS 4A2 and IRAS 16293B. Within the common spectral range toward these sources, we found three features are possibly related to the spectral transitions of methyl carbamate and consequently estimate the upper limit of column densities. Results of chemical modeling are consistent with the observational upper limit of estimated column density/abundance toward the sources. This may hint the validation of the proposed formation mechanism. Future observations using a telescope like ngVLA may confirm the presence of MC toward the hot corinos.

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Amino Acids in the Universe

Cited by 2 publications

References 23 publications

Glycinamide, a Glycine Precursor, Caught in the Gas Phase: A Laser-ablation Jet-cooled Rotational Study

Glycinamide, a Glycine Precursor, Caught in the Gas Phase: A Laser-ablation Jet-cooled Rotational Study

Constraints of the Formation and Abundances of Methyl Carbamate, a Glycine Isomer, in Hot Corinos

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