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    • Dpto. Química Física y Química Inorgánica
    • DEP63 - Artículos de revista
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    • DEP63 - Artículos de revista
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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/22511

    Título
    Is the reaction between formic acid and protonated aminomethanol a possible source of glycine precursors in the interstellar medium?
    Autor
    Redondo Cristóbal, María del PilarAutoridad UVA Orcid
    Largo Cabrerizo, AntonioAutoridad UVA Orcid
    Barrientos Benito, María CarmenAutoridad UVA Orcid
    Año del Documento
    2015
    Editorial
    EDP Sciences
    Descripción
    Producción Científica
    Documento Fuente
    Astronomy and Astrophysics, vol. 579, A125 (2015)
    Abstract
    Context. One of the most interesting questions in interstellar chemistry concerns whether we can detect the basic building blocks of proteins in astronomical sources. In ascertaining whether amino acids could be possible interstellar molecules, a crucial point is how they could be synthesized in the interstellar medium. Aims. We do a theoretical study of the ion-molecule reaction involving protonated aminomethanol and formic acid to establish its viability in space. This ion-molecule reaction has been proposed by other authors as a possible way to produce glycine in the interstellar medium. Methods. The relevant stationary points on the potential energy surface of the reaction between protonated aminomethanol and formic acid have been theoretically studied by using ab initio methods. The second-order Moller-Plesset level was employed, in conjunction with the correlation-consistent polarized valence triple-zeta (cc-pVTZ) basis set. In addition, the electronic energies were refined by means of single-point calculations at the CCSD(T) level (coupled cluster single and double excitation model augmented with a non-iterative treatment of triple excitations) on the MP2/cc-pVTZ geometries with the aug-cc-pVTZ basis set. Results. Formation of protonated glycine is an exothermic process; however, the process presents a net activation barrier that makes this reaction unfeasible under interstellar conditions. Conclusions. The reaction of protonated aminomethanol with formic acid does not seem to be a plausible source of interstellar glycine. This particular case is a clear example that a detailed study of the potential energy surface is needed to establish the relevance of a process in the interstellar medium.
    Palabras Clave
    Astrobiología
    Astroquímica
    Moléculas
    ISSN
    0004-6361
    Revisión por pares
    SI
    DOI
    10.1051/0004-6361/201526548
    Patrocinador
    Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA330U13)
    Version del Editor
    http://www.aanda.org
    Propietario de los Derechos
    © European Southern Observatory (ESO)
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/22511
    Derechos
    openAccess
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    • DEP63 - Artículos de revista [326]
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    Universidad de Valladolid

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