Defects on a pyrite(100) surface produce chemical evolution of glycine under inert conditions: experimental and theoretical approaches

Gálvez Martínez, S.Escamilla Roa, E.Zorzano, María PazMateo Martí, EvaUnidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-07372021-04-142021-04-142019-10-10Royal Society of Chemistry 21(44): 24535-24542(2019)1463-9076https://pubs.rsc.org/en/content/articlelanding/2019/CP/C9CP03577Jhttp://hdl.handle.net/20.500.12666/332The 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.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Defects on a pyrite(100) surface produce chemical evolution of glycine under inert conditions: experimental and theoretical approachesinfo:eu-repo/semantics/article10.1039/C9CP03577J1463-9084info:eu-repo/semantics/openAccess