Molecular and isotopic compositions of nitrogen-containing organic molecules formed during UV-irradiation of simulated interstellar ice

• Sugahara Haruna

  Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Institut de Chimie de Nice, Université Côte d’Azur, CNRS

• Takano Yoshinori

  Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

• Tachibana Shogo

  UTokyo Organization for Planetary and Space Science, The University of Tokyo Department of Natural History Sciences, Hokkaido University

• Sugawara Iyo

  Department of Natural History Sciences, Hokkaido University

• Chikaraishi Yoshito

  Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Institute of Low Temperature Science, Hokkaido University

• Ogawa Nanako O.

  Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

• Ohkouchi Naohiko

  Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

• Kouchi Akira

  Institute of Low Temperature Science, Hokkaido University

• Yurimoto Hisayoshi

  Department of Natural History Sciences, Hokkaido University

抄録

Interstellar ice is a reaction site for molecular evolution. Gaseous molecules are frozen at low temperature (~10 K) to form ice mantles and the energy supplied by UV photons and other energy sources can lead to the synthesis of complex organics. Nitrogen-containing organic molecules are of special interest because of their biomolecular importance and their anomalous stable nitrogen isotopic composition (¹⁵N/¹⁴N) in the interstellar dust environment. Thus, N-containing organic molecules are the keys to understanding the evolution of organic molecules and the solar system. We focused on amino acids and amines in refractory organic residues formed from ultraviolet (UV) irradiated interstellar ice analogues. We developed analytical techniques that enable the identification of the small quantities of molecules formed from the simulated interstellar ice analogues. Organic residue analysis of the UV-irradiated H₂O-CH₃OH-NH₃ ice showed the formation of three amines (methylamine, ethylamine and propylamine) and 11 amino acids (e.g., glycine, α-alanine, β-alanine, sarcosine, α-aminobutyric acid and β-aminoisobutyric acid). Furthermore, the compound-specific isotope analysis of nitrogen within the amino acids and the bulk organic film revealed that little isotopic fractionation occurred during formation in the simulated environment.

収録刊行物

• ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ

  ＧＥＯＣＨＥＭＩＣＡＬ　ＪＯＵＲＮＡＬ 53 (1), 5-20, 2019

  一般社団法人日本地球化学会

キーワード

• amines and amino acids
• bulk and compound-specific nitrogen isotope analysis
• ice mantle
• simulated interstellar ice formation
• UV-irradiation

詳細情報

• CRID: 1390001288122313856
• NII論文ID: 130007594396
• NII書誌ID: AA00654975
• DOI: 10.2343/geochemj.2.0553
• ISSN: 18805973
• ISSN: 00167002
• NDL書誌ID: 029673062
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029673062
• Web Site: https://www.jstage.jst.go.jp/article/geochemj/53/1/53_2.0553/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可