Your browser doesn't support javascript.
loading
Clathrate hydrates in interstellar environment.
Ghosh, Jyotirmoy; Methikkalam, Rabin Rajan J; Bhuin, Radha Gobinda; Ragupathy, Gopi; Choudhary, Nilesh; Kumar, Rajnish; Pradeep, Thalappil.
Afiliação
  • Ghosh J; Department of Science and Technology (DST) Unit of Nanoscience and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
  • Methikkalam RRJ; Department of Science and Technology (DST) Unit of Nanoscience and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
  • Bhuin RG; Department of Science and Technology (DST) Unit of Nanoscience and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
  • Ragupathy G; Department of Science and Technology (DST) Unit of Nanoscience and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
  • Choudhary N; Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India.
  • Kumar R; Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India rajnish@iitm.ac.in pradeep@iitm.ac.in.
  • Pradeep T; Department of Science and Technology (DST) Unit of Nanoscience and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India; rajnish@iitm.ac.in pradeep@iitm.ac.in.
Proc Natl Acad Sci U S A ; 116(5): 1526-1531, 2019 01 29.
Article em En | MEDLINE | ID: mdl-30630945
Clathrate hydrates (CHs) are ubiquitous in earth under high-pressure conditions, but their existence in the interstellar medium (ISM) remains unknown. Here, we report experimental observations of the formation of methane and carbon dioxide hydrates in an environment analogous to ISM. Thermal treatment of solid methane and carbon dioxide-water mixture in ultrahigh vacuum of the order of 10-10 mbar for extended periods led to the formation of CHs at 30 and 10 K, respectively. High molecular mobility and H bonding play important roles in the entrapment of gases in the in situ formed 512 CH cages. This finding implies that CHs can exist in extreme low-pressure environments present in the ISM. These hydrates in ISM, subjected to various chemical processes, may act as sources for relevant prebiotic molecules.
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article