Methylenimine and cyanomethanimine synthesis from ion irradiation of N-2-CH4 ice: Implication on the formation of prebiotic molecules in outer solar system bodies

Autor(es)

Vasconcelos, F. A. ^[1] ; Pilling, S. ^[2] ; Agnihotri, A. ^[3] ; Rothard, H. ^[3] ; Boduch, P. ^[3]

Afiliação do(s) autor(es)

^[1] Inst Fed Tocantins IFTO, Observ Fis Espacial, Campus Araguatins, Araguatins, TO - Brazil

^[2] Univ Vale Paraiba UNIVAP, Lab Astroquim & Astrobiol LASA, Av Shishima Hifumi 2911, Sao Jose Dos Campos, SP - Brazil

^[3] Normandie Univ, Ctr Rech Ions Mat & Photon, CIMAP CIRIL GANIL, ENSICAEN, UNICAEN, CEA, CNRS, F-14000 Caen - France

• Tipo de documento: Artigo Científico
• Fonte: ICARUS; v. 351, NOV 15 2020.
• Citações Web of Science: 0

Resumo

The synthesis of methylenimine and cyanomethanimine from ion irradiation of N-2-CH4 ice was studied, in an attempt to simulate the role of medium mass cosmic rays and energetic solar particles in the processing of nitrogen-rich ices on cold astrophysical environments, such as those in the outer region of the solar system (e.g. Pluto, Charon, Triton, Makemake and Titan). The N-2-CH4 (90:10) ice mixture was irradiated at 9 K by 38.4 MeV Ca-40(9+) (0.96 MeV/u) at the GANIL facility (Caen/Fance). The evolution of the samples was monitored using insitu Fourier transform infrared spectroscopy (FTIR). The results indicate the formation of CH2NH and CH2NCN, which are considered species of interest in prebiotic chemistry. Other species produced by radiolysis were HCN, HNC, hydrocarbons and nitriles. Direct comparison of the laboratory spectrum from the mixture of reaction products provides an efficient way to focus on the identification of chemical synthesis routes for the production of molecules important in the development of life that are consistent with the chemical inventory and physical conditions on frozen moons and cold objects in the outer solar system. (AU)

• Processo FAPESP: 15/10492-3 - Estudo da evolução química de gelos astrofísicos na vizinhança de objetos estelares jovens empregando dados experimentais no infravermelho e modelagem computacional
• Beneficiário: Will Robson Monteiro Rocha
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 09/18304-0 - Síntese e degradação de espécies moleculares pré-bióticas em atmosferas planetárias, cometas e gelos interestelares simulados
• Beneficiário: Sergio Pilling Guapyassu de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores