FERUS, Martin, Svatopluk CIVIS, Arnošt MLÁDEK, Jiří ŠPONER, Libor JUHA and Judit ŠPONEROVÁ. On the Road from Formamide Ices to Nucleobases: IR-Spectroscopic Observation of a Direct Reaction between Cyano Radicals and Formamide in a High-Energy Impact Event. Journal of the American Chemical Society. WASHINGTON: American Chemical Society, 2012, vol. 134, No 51, p. 20788-20796. ISSN 0002-7863. doi:10.1021/ja310421z.
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Basic information
Original name On the Road from Formamide Ices to Nucleobases: IR-Spectroscopic Observation of a Direct Reaction between Cyano Radicals and Formamide in a High-Energy Impact Event
Authors FERUS, Martin (203 Czech Republic), Svatopluk CIVIS (203 Czech Republic), Arnošt MLÁDEK (203 Czech Republic, belonging to the institution), Jiří ŠPONER (203 Czech Republic, guarantor, belonging to the institution), Libor JUHA (203 Czech Republic) and Judit ŠPONEROVÁ (348 Hungary, belonging to the institution).
Edition Journal of the American Chemical Society, WASHINGTON, American Chemical Society, 2012, 0002-7863.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10610 Biophysics
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 10.677
RIV identification code RIV/00216224:14740/12:00063768
Organization unit Central European Institute of Technology
Doi http://dx.doi.org/10.1021/ja310421z
UT WoS 000313154200035
Keywords in English HIGH-POWER LASER; APPROXIMATE COULOMB POTENTIALS; INDUCED DIELECTRIC-BREAKDOWN; AUXILIARY BASIS-SETS; VIBRATIONAL FREQUENCIES; GAS-MIXTURES; INFORMATIONAL POLYMERS; EMISSION-SPECTROSCOPY; NA+-MONTMORILLONITE; PREBIOTIC SYNTHESIS
Tags ok, rivok
Tags International impact, Reviewed
Changed by Changed by: Olga Křížová, učo 56639. Changed: 14. 2. 2013 05:28.
Abstract
The formamide-based synthesis of nucleic acids is considered as a nonaqueous scenario for the emergence of biomolecules from inorganic matter. In the current study, we scrutinized the chemical composition of formamide ices mixed with an FeNi meteorite material treated with laser-induced dielectric breakdown plasma created in nitrogen buffer gas. These experiments aimed to capture the first steps of those chemical transformations that may lead to the formation of nucleobases during the impact of an extraterrestrial icy body containing formamide on an early Earth atmosphere. High-resolution FT-IR spectroscopy combined with quantum chemical calculations was used to analyze the volatile fraction of the products formed during such an event. We have found that the spectrum of the evaporated formamide ices is dominated by the spectral signatures of the dimeric form of formamide. Upon exposure to laser sparks, new well-defined bands appear in the spectrum centered at similar to 820, similar to 995, and similar to 1650 cm(-1). On the basis of quantum chemical calculations, these bands can be assigned to the absorptions of 2-amino-2-hydroxy-acetonitrile and to 2-amino-2-hydroxy-malononitrile, which are formed in a direct reaction between formamide and CN* radicals upon the high-energy impact event. We also show that there is an exergonic reaction route via these intermediates leading to diaminomaleonitrile, which is generally considered to play a key role in the synthesis of nucleobases.
Links
ED1.1.00/02.0068, research and development projectName: CEITEC - central european institute of technology
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