Formamide reactions on rutile TiO2(011) surface

Muir, Joshua M.R.; Idriss, Hicham

doi:10.1016/j.susc.2009.08.012

Cited by 20 publications

(14 citation statements)

References 29 publications

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“…Among the various pathways proposed, an interesting option relies on the polyhydric chemistry of formamide: as reported in several research papers [2,3,4,5,6,7,8,9,10,11,12], formamide is able to originate many relevant prebiotic molecules (particularly nucleobases) under mild thermal or photochemical reaction conditions. Furthermore, the selectivity toward specific products is strongly affected by the presence of mineral phases in the reaction environment; therefore, it is logical to expect that the surfaces of these minerals could drive the reaction steps from bare formamide to final products, eventually also catalyzing some of these processes.…”

Section: Introductionmentioning

confidence: 99%

Formamide Adsorption at the Amorphous Silica Surface: A Combined Experimental and Computational Approach

Signorile

Salvini

Zamirri

et al. 2018

Life

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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.

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Section: Introductionmentioning

confidence: 99%

Formamide Adsorption at the Amorphous Silica Surface: A Combined Experimental and Computational Approach

Signorile

Salvini

Zamirri

et al. 2018

Life

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“…The binding energies are corrected for specimen charging by referencing the C 1s line to 284.8 eV, and the spectrum reveals that the octadecahedron surfaces are mainly composed of Fe and O. However, peaks at binding energies of 399.47 eV for N 1s can be observed, which could be attributed to the surface adsorption of formamide 12d. According to Yang and co‐workers,6b the selective adsorption of formamide to α‐Fe 2 O 3 depends on the crystal structures of the facets.…”

Section: Resultsmentioning

confidence: 99%

“…The deformation of CH and the carbonyl stretch indicated that the formamide adsorption is of η 1 (O)–CONH 2 ‐type 14. The adsorption is mainly achieved by the Lewis acid–Lewis base interaction between the carbonyl group and Fe 3+ , and thus restrains the growth process of octadecahedral α‐Fe 2 O 3 nanoparticles on the {112} facets 12d. With an increasing amount of formamide, the adsorption on the {112} facets increases accordingly.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Properties of Octadecahedral α‐Fe₂O₃ Nanoparticles Enclosed by {104} and {112} Facets

Liu

et al. 2012

Eur J Inorg Chem

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Octadecahedral α-Fe 2 O 3 nanoparticles were hydrothermally synthesized in the presence of formamide. These octadecahedral α-Fe 2 O 3 nanoparticles have a threefold axis and are enclosed by twelve dominant {112} facets and six {104} facets. In comparison with the {104} facets, the sterically less hindered {112} facets induced the selective adsorption of formamide more easily, which resulted in the gradual increase in the amount of {112} facets by decreasing the amount of [a]

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“…This concept is summarized in Figure 1. This reactions cascade can take place in bulk formamide in significantly boosted in presence of mineral phases in the reaction environment [13][14][15][16][17][18][19][20]. Such catalytic effect does not only affect the nucleobases productivity, but also causes its selective conversion toward specific products depending on the nature of the mineral component.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the Reactivity of Formamide on Amorphous SiO2 by In-Situ UV-Raman Spectroscopy and DFT Modeling

Pantaleone

Signorile²,

Balucani

et al. 2024

Preprint

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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 situ UV-Raman characterization of the chemical evolution of formamide over amorphous SiO2 samples, selected as a prototype of silicate minerals, was performed. The experiments were carried out after reaction of formamide at 160 &#176;C on amorphous SiO2 (Aerosil OX50) either pristine or pre-calcined at 450 &#176;C, to remove a large fraction of surface silanol groups. Our measurements, interpreted on the basis of density functional B3LYP-D3 calculations (Figure 1), 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.

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Formamide reactions on rutile TiO2(011) surface

Cited by 20 publications

References 29 publications

Formamide Adsorption at the Amorphous Silica Surface: A Combined Experimental and Computational Approach

Formamide Adsorption at the Amorphous Silica Surface: A Combined Experimental and Computational Approach

Preparation and Properties of Octadecahedral α‐Fe₂O₃ Nanoparticles Enclosed by {104} and {112} Facets

Monitoring the Reactivity of Formamide on Amorphous SiO2 by In-Situ UV-Raman Spectroscopy and DFT Modeling

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Formamide reactions on rutile TiO2(011) surface

Cited by 20 publications

References 29 publications

Formamide Adsorption at the Amorphous Silica Surface: A Combined Experimental and Computational Approach

Formamide Adsorption at the Amorphous Silica Surface: A Combined Experimental and Computational Approach

Preparation and Properties of Octadecahedral α‐Fe2O3 Nanoparticles Enclosed by {104} and {112} Facets

Monitoring the Reactivity of Formamide on Amorphous SiO2 by In-Situ UV-Raman Spectroscopy and DFT Modeling

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Preparation and Properties of Octadecahedral α‐Fe₂O₃ Nanoparticles Enclosed by {104} and {112} Facets