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Defects on a pyrite(100) surface produce chemical evolution of glycine under inert conditions: experimental and theoretical approaches
Centro de Astrobiología (CSIC-INTA), Madrid, Spain.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.ORCID iD: 0000-0003-2286-8380
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology. Centro de Astrobiología (CSIC-INTA), Madrid, Spain.ORCID iD: 0000-0002-4492-9650
Centro de Astrobiología (CSIC-INTA), Madrid, Spain.
2019 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 21, no 44, p. 24535-24542Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2019. Vol. 21, no 44, p. 24535-24542
Keywords [en]
Pyrite (100), chemical evolution, glycine
National Category
Geochemistry Aerospace Engineering
Research subject
Atmospheric science
Identifiers
URN: urn:nbn:se:ltu:diva-76380DOI: 10.1039/C9CP03577JISI: 000498220500027OAI: oai:DiVA.org:ltu-76380DiVA, id: diva2:1360796
Note

Validerad;2019;Nivå 2;2019-12-09 (johcin)

Available from: 2019-10-14 Created: 2019-10-14 Last updated: 2019-12-09Bibliographically approved

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Escamilla-Roa, ElizabethZorzano Mier, María-Paz

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