Defects on a pyrite(100) surface produce chemical evolution of glycine under inert conditions

experimental and theoretical approaches

Document identifier: oai:DiVA.org:ltu-76380
Access full text here:10.1039/C9CP03577J
Keyword: Natural Sciences, Teknik och teknologier, Atmosfärsvetenskap, Glycine, Chemical evolution, Pyrite (100), Rymd- och flygteknik, Maskinteknik, Aerospace Engineering, Earth and Related Environmental Sciences, Mechanical Engineering, Engineering and Technology, Geokemi, Geovetenskap och miljövetenskap, Naturvetenskap, Geochemistry, Atmospheric science
Publication year: 2019
Relevant Sustainable Development Goals (SDGs):
SDG 9 Industry, innovation and infrastructureSDG 15 Life on land
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

The presence of non-stoichiometric sites on the pyrite(100) surface makes it a suitable substrate for driving the chemical evolution of the amino acid glycine over time, even under inert conditions. Spectroscopic molecular fingerprints prove a transition process from a zwitterionic species to an anionic species over time on the monosulfide enriched surface. By combining experimental and theoretical approaches, we propose a surface mechanism where the interaction between the amino acid species and the surface will be driven by the quenching of the surface states at Fe sites and favoured by sulfur vacancies. This study demonstrates the potential capability of pyrite to act as a surface catalyst.

Authors

Santos Galvez-Martinez

Centro de Astrobiología (CSIC-INTA), Madrid, Spain
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Elizabeth Escamilla-Roa

Luleå tekniska universitet; Rymdteknik
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María-Paz Zorzano Mier

Luleå tekniska universitet; Rymdteknik; Centro de Astrobiología (CSIC-INTA), Madrid, Spain
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E. Mateo-Marti

Centro de Astrobiología (CSIC-INTA), Madrid, Spain
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