English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/173572
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Ultraviolet Irradiation on a Pyrite Surface Improves Triglycine Adsorption

AuthorsGálvez Martínez, Santos; Mateo-Martí, Eva CSIC ORCID
AdvisorSulfide mineral
KeywordsPyrite
Triglycine
Peptide
UV
Surface
Adsorption
Prebiotic chemistry
Issue Date25-Oct-2018
PublisherMultidisciplinary Digital Publishing Institute
CitationLife 8(4): 50 (2018)
AbstractWe characterized the adsorption of triglycine molecules on a pyrite surface under several simulated environmental conditions by X-ray photoemission spectroscopy. The triglycine molecular adsorption on a pyrite surface under vacuum conditions (absence of oxygen) shows the presence of two different states for the amine functional group (NH2 and NH3+), therefore two chemical species (anionic and zwitterionic). On the other hand, molecular adsorption from a solution discriminates the NH2 as a unique molecular adsorption form, however, the amount adsorbed in this case is higher than under vacuum conditions. Furthermore, molecular adsorption on the mineral surface is even favored if the pyrite surface has been irradiated before the molecular adsorption occurs. Pyrite surface chemistry is highly sensitive to the chemical changes induced by UV irradiation, as XPS analysis shows the presence of Fe2O3 and Fe2SO4—like environments on the surface. Surface chemical changes induced by UV help to increase the probability of adsorption of molecular species and their subsequent concentration on the pyrite surface.
Publisher version (URL)https://doi.org/10.3390/life8040050
URIhttp://hdl.handle.net/10261/173572
DOIhttp://dx.doi.org/10.3390/life8040050
E-ISSN2075-1729
Appears in Collections:(CAB) Artículos
Files in This Item:
File Description SizeFormat 
life-08-00050.pdf1,84 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.