Formamide adsorption at the amorphous silica surface : A combined experimental and computational approach
Signorile, M. (Università di Torino. Dipartimento di Chimica and NIS)
Salvini, Clara (Università di Torino. Dipartimento di Chimica and NIS)
Zamirri, Lorenzo (Università di Torino. Dipartimento di Chimica and NIS)
Bonino, Francesca (Università di Torino. Dipartimento di Chimica and NIS)
Martra, Gianmario (Università di Torino. Dipartimento di Chimica and NIS)
Sodupe Roure, Mariona (Universitat Autònoma de Barcelona. Departament de Química)
Ugliengo, Piero (Università di Torino. Dipartimento di Chimica and NIS)

Data:	2018
Resum:	Mineral surfaces have been demonstrated to play a central role in prebiotic reactions, which are understood to be at the basis of the origin of life. Among the various molecules proposed as precursors for these reactions, one of the most interesting is formamide. Formamide has been shown to be a pluripotent molecule, generating a wide distribution of relevant prebiotic products. In particular, the outcomes of its reactivity are strongly related to the presence of mineral phases acting as catalysts toward specific reaction pathways. While the mineral-products relationship has been deeply studied for a large pool of materials, the fundamental description of formamide reactivity over mineral surfaces at a microscopic level is missing in the literature. In particular, a key step of formamide chemistry at surfaces is adsorption on available interaction sites. This report aims to investigate the adsorption of formamide over a well-defined amorphous silica, chosen as a model mineral surface. An experimental IR investigation of formamide adsorption was carried out and its outcomes were interpreted on the basis of first principles simulation of the process, adopting a realistic model of amorphous silica.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Formamide ; Silica ; IR spectroscopy ; DFT
Publicat a:	Life, Vol. 8, Núm. 4 (december 2018) , art. 42, ISSN 2075-1729

DOI: 10.3390/life8040042
PMID: 30249032

13 p, 3.2 MB

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