Molecular Evolution of N-Containing Cyclic Compounds in the Parent Body of the Murchison Meteorite

· by · in , ,

Hiroshi Naraoka, Yohei Yamashita, Mihoko Yamaguchi, François-Régis Orthous-Daunay

ACS Earth Space Chem., Article ASAP
DOI: 10.1021/acsearthspacechem.7b00058
Publication Date (Web): August 14, 2017

LINK

“Primitive meteorites contain various classes of organic compounds. Because the molecular distribution in these meteorites is not fully clarified, we do not yet understand the comprehensive formation mechanism(s) of extraterrestrial organic compounds. In this study, diverse and abundant alkylated homologues of N-containing cyclic compounds were identified in the methanol extract of the Murchison meteorite by electrospray ionization using high-performance liquid chromatography/ultrahigh-resolution mass spectrometry. More than 600 positive ions were assigned to CnHmN+ and CnHmN2+, in which saturated and unsaturated alkylated pyridines and alkylimidazoles are predominant. Both can be synthesized from aldehydes and ammonia through aldol condensation and imine formation under an alkaline environment. Further redox reactions could have proceeded to make these molecules evolve to various CHN compounds, including alkylpiperidines and pyridine carboxylic acids. This study indicates that aldol condensation and formose reaction with ammonia are an important mechanism for the molecular evolution of N-containing compounds in the asteroid.”

Related posts (automatically generated):

  1. High‐mass resolution molecular imaging of organic compounds on the surface of Murchison meteorite
  2. Evolution of organic matter in Orgueil, Murchison and Renazzo during parent body aqueous alteration: in-situ investigations
  3. Extraterrestrial organic compounds and cyanide in the CM2 carbonaceous chondrites Aguas Zarcas and Murchison
  4. Molecular evolution during hydrothermal reactions from formaldehyde and ammonia simulating aqueous alteration in meteorite parent bodies
  5. Profiling Murchison Soluble Organic Matter for New Organic Compounds with APPI- and ESI-FT-ICR MSOPEN ACCESS 
  6. Soluble Sulfur-Bearing Organic Compounds in Carbonaceous Meteorites: Implications for Chemical Evolution in Primitive Asteroids
  7. Fe isotope composition of bulk chondrules from Murchison (CM2): Constraints for parent body alteration, nebula processes and chondrule-matrix complementarity
  8. Cr isotopes in physically separated components of the Allende CV3 and Murchison CM2 chondrites: Implications for isotopic heterogeneity in the solar nebula and parent body processesOPEN ACCESS 
  9. Monitoring the Thermal Evolution of the CM Parent Body(ies) with In Situ Oxygen Isotope Analyses
  10. Kinetics in thermal evolution of Raman spectra of chondritic organic matter to evaluate thermal history of their parent bodies
Tags: , ,