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Research Article

Aldehydes and sugars from evolved precometary ice analogs: Importance of ices in astrochemical and prebiotic evolution

Pierre de Marcellus, Cornelia Meinert, Iuliia Myrgorodska, Laurent Nahon, Thomas Buhse, Louis Le Sergeant d’Hendecourt, and Uwe J. Meierhenrich
PNAS first published January 12, 2015; https://doi.org/10.1073/pnas.1418602112
Pierre de Marcellus
aUniversité Paris-Sud, Institut d’Astrophysique Spatiale, UMR 8617, CNRS, F-91405 Orsay, France;
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Cornelia Meinert
bUniversité de Nice-Sophia Antipolis, Institut de Chimie de Nice, UMR 7272, CNRS, F-06108 Nice, France;
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  • For correspondence: ldh@ias.u-psud.fr cornelia.meinert@unice.fr
Iuliia Myrgorodska
bUniversité de Nice-Sophia Antipolis, Institut de Chimie de Nice, UMR 7272, CNRS, F-06108 Nice, France;
cSynchrotron SOLEIL, F-91192 Gif-sur-Yvette, France; and
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Laurent Nahon
cSynchrotron SOLEIL, F-91192 Gif-sur-Yvette, France; and
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Thomas Buhse
dCentro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, 62209 Cuernavaca, Mexico
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Louis Le Sergeant d’Hendecourt
aUniversité Paris-Sud, Institut d’Astrophysique Spatiale, UMR 8617, CNRS, F-91405 Orsay, France;
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  • For correspondence: ldh@ias.u-psud.fr cornelia.meinert@unice.fr
Uwe J. Meierhenrich
bUniversité de Nice-Sophia Antipolis, Institut de Chimie de Nice, UMR 7272, CNRS, F-06108 Nice, France;
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  1. Edited by Mark H. Thiemens, University of California, San Diego, La Jolla, CA, and approved December 12, 2014 (received for review September 26, 2014)

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Significance

In molecular clouds out of which stars and planetary systems form, simple solid-state molecules made in large part of H2O, CO, CO2, CH3OH, and NH3 are abundantly present. In these environments, energetic and thermal processes on these ices, which can be simulated in the laboratory, lead to complex organic matter. Possibly at the origin of the organic matter in our Solar System and incorporated into planetesimals, this material may be considered as a potential source for prebiotic chemistry on telluric planets, following a process that may be quite universal. The composition of these laboratory-evolved ices includes potentially prebiotic species such as amino acids and, as presented in this paper, aldehydes and sugars.

Abstract

Evolved interstellar ices observed in dense protostellar molecular clouds may arguably be considered as part of precometary materials that will later fall on primitive telluric planets, bringing a wealth of complex organic compounds. In our laboratory, experiments reproducing the photo/thermochemical evolution of these ices are routinely performed. Following previous amino acid identifications in the resulting room temperature organic residues, we have searched for a different family of molecules of potential prebiotic interest. Using multidimensional gas chromatography coupled to time-of-flight mass spectrometry, we have detected 10 aldehydes, including the sugar-related glycolaldehyde and glyceraldehyde—two species considered as key prebiotic intermediates in the first steps toward the synthesis of ribonucleotides in a planetary environment. The presence of ammonia in water and methanol ice mixtures appears essential for the recovery of these aldehydes in the refractory organic residue at room temperature, although these products are free of nitrogen. We finally point out the importance of detecting aldehydes and sugars in extraterrestrial environments, in the gas phase of hot molecular clouds, and, more importantly, in comets and in primitive meteorites that have most probably seeded the Earth with organic material as early as 4.2 billion years ago.

  • glyceraldehyde
  • glycolaldehyde
  • astrochemistry
  • precometary ices
  • prebiotic evolution

Footnotes

  • ↵1P.M. and C.M. contributed equally to this work.

  • ↵2To whom correspondence may be addressed. Email: ldh{at}ias.u-psud.fr or cornelia.meinert{at}unice.fr.
  • Author contributions: L.N., T.B., L.L.S.H., and U.J.M. designed research; P.M. and C.M. performed research; C.M. and I.M. analyzed data; and P.M., C.M., L.L.S.H., and U.J.M. wrote the paper.

  • The authors declare no conflict of interest.

  • This article is a PNAS Direct Submission.

  • This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1418602112/-/DCSupplemental.

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Aldehydes and sugars from precometary ice analogs
Pierre de Marcellus, Cornelia Meinert, Iuliia Myrgorodska, Laurent Nahon, Thomas Buhse, Louis Le Sergeant d’Hendecourt, Uwe J. Meierhenrich
Proceedings of the National Academy of Sciences Jan 2015, 201418602; DOI: 10.1073/pnas.1418602112

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Aldehydes and sugars from precometary ice analogs
Pierre de Marcellus, Cornelia Meinert, Iuliia Myrgorodska, Laurent Nahon, Thomas Buhse, Louis Le Sergeant d’Hendecourt, Uwe J. Meierhenrich
Proceedings of the National Academy of Sciences Jan 2015, 201418602; DOI: 10.1073/pnas.1418602112
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