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• W3025792160 endingPage "2274" @default.
• W3025792160 startingPage "2274" @default.
• W3025792160 abstract "Formamide has been recognized in the literature as a key species in the formation of the complex molecules of life, such as nucleobases. Furthermore, several studies reported the impact of mineral phases as catalysts for its decomposition/polymerization processes, increasing the conversion and also favoring the formation of specific products. Despite the progresses in the field, in situ studies on these mineral-catalyzed processes are missing. In this work, we present an in situ UV-Raman characterization of the chemical evolution of formamide over amorphous SiO2 samples, selected as a prototype of silicate minerals. The experiments were carried out after reaction of formamide at 160 °C on amorphous SiO2 (Aerosil OX50) either pristine or pre-calcined at 450 °C, to remove a large fraction of surface silanol groups. Our measurements, interpreted on the basis of density functional B3LYP-D3 calculations, allow to assign the spectra bands in terms of specific complex organic molecules, namely, diaminomaleonitrile (DAMN), 5-aminoimidazole (AI), and purine, showing the role of the mineral surface on the formation of relevant prebiotic molecules." @default.
• W3025792160 created "2020-05-21" @default.
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• W3025792160 date "2020-05-12" @default.
• W3025792160 modified "2023-10-16" @default.
• W3025792160 title "Monitoring the Reactivity of Formamide on Amorphous SiO2 by In-Situ UV-Raman Spectroscopy and DFT Modeling" @default.
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• W3025792160 doi "https://doi.org/10.3390/molecules25102274" @default.
• W3025792160 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7287731" @default.
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• W3025792160 hasPublicationYear "2020" @default.
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