Previously unknown class of metalorganic compounds revealed in meteorites

Alexander Ruf 1, 2 Basem Kanawati 2 Norbert Hertkorn 2 Qing-Zhu Yin 3 Franco Moritz 2 Mourad Harir 2, 1 Marianna Lucio 2 Bernhard Michalke 2 Joshua Wimpenny 3 Svetlana Shilobreeva 4 Basil Bronsky 4 Vladimir Saraykin 5, 4 Zelimir Gabelica 6 Régis D. Gougeon 7 Eric Quirico 8 Stefan Ralew Tomasz Jakubowski 9 Henning Haack 10 Michael Gonsior 11 Peter Jenniskens 12, 13 Nancy W. Hinman 14 Philippe Schmitt-Kopplin 2, 1, *
* Auteur correspondant
1 Chair of Analytical Food Chemistry
2 BGC - Research Unit Analytical BioGeoChemistry
3 University of California Davis
4 GEOKHI - Vernadsky Institute of Geochemistry and Analytical Chemistry
5 Moscow Inst Phys & Technol, Dolgoprudnyi, Russia
6 Ecole Nationale Supérieure de Chimie de Mulhouse
7 PAM - Procédés Alimentaires et Microbiologiques [Dijon]
8 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
9 Instytut Matematyki
10 Centre for Star and Planet Formation
11 CBL - Chesapeake Biological Laboratory
12 SETI Institute
13 ARC - NASA Ames Research Center
14 MSU - Montana State University
Abstract : The rich diversity and complexity of organic matter found in meteorites is rapidly expanding our knowledge and understanding of extreme environments from which the early solar system emerged and evolved. Here, we report the discovery of a hitherto unknown chemical class, dihydroxymagnesium carboxylates [(OH)(2)MgO2CR](-), in meteoritic soluble organic matter. High collision energies, which are required for fragmentation, suggest substantial thermal stability of these Mg-metalorganics (CHOMg compounds). This was corroborated by their higher abundance in thermally processed meteorites. CHOMg compounds were found to be present in a set of 61 meteorites of diverse petrological classes. The appearance of this CHOMg chemical class extends the previously investigated, diverse set of CHNOS molecules. A connection between the evolution of organic compounds and minerals is made, as Mg released from minerals gets trapped into organic compounds. These CHOMg metalorganic compounds and their relation to thermal processing in meteorites might shed new light on our understanding of carbon speciation at a molecular level in meteorite parent bodies.
Keywords : Fall Chondrite Chemistry Carbonaceous meteorites Magnesium Mass-spectrometry Parent body Metalorganic chemistry Meteorites astrochemistry Fourier transform ion cyclotron resonance mass spectrometry Organic evolution Extraterrestrial amino-acids Organic-matter Murchison meteorite
Type de document :
Article dans une revue
Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2017, 114 (11), pp.2819 - 2824. 〈10.1073/pnas.1616019114〉
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Contributeur : Pam - Université de Bourgogne <>
Soumis le : jeudi 8 juin 2017 - 11:51:48
Dernière modification le : vendredi 8 juin 2018 - 14:50:26

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Alexander Ruf, Basem Kanawati, Norbert Hertkorn, Qing-Zhu Yin, Franco Moritz, et al.. Previously unknown class of metalorganic compounds revealed in meteorites. Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2017, 114 (11), pp.2819 - 2824. 〈10.1073/pnas.1616019114〉. 〈hal-01534828〉

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