New physical insights: Formamide discharge decomposition and the role of fragments in the formation of large biomolecules

0558896 - ÚFCH JH 2023 RIV NL eng J - Journal Article
Pastorek, Adam - Clark, V. H. J. - Yurchenko, S. N. - Ferus, Martin - Civiš, Svatopluk
New physical insights: Formamide discharge decomposition and the role of fragments in the formation of large biomolecules.
Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy. Roč. 278, OCT 2022 (2022), č. článku 121322. ISSN 1386-1425. E-ISSN 1873-3557
R&D Projects: GA MŠMT EF16_019/0000778; GA ČR(CZ) GA21-11366S
EU Projects: European Commission(XE) 883830
Institutional support: RVO:61388955
Keywords : Energy transfer * Fourier transform infrared spectroscopy * Glow discharges
OECD category: Physical chemistry
Impact factor: 4.4, year: 2022
Method of publishing: Limited access

In this work we present a time-resolved FTIR spectroscopic study on kinetics of atomic and molecular species, specifically CO, CN radical, N-2, HCN and CO2 generated in a glow discharge of formamide-nitrogen-water mixture in a helium buffer gas. Radicals such as NH, CH and OH have been proven to be fundamental stones of subsequent chemical reactions having a crucial role in a prebiotic synthesis of large organic molecules.This work contains three main goals. Firstly, we present our time-resolved spectra of formamide decomposition products and discuss the mechanism of collisional excitations between specific species. Secondly, according to our time resolution, we demonstrate and explain the band shape of CO's first overtone and the energy transfer between excited nitrogen and CO, present in our spectra. Lastly, we present theoretical results for the non-LTE modelling of the spectra using bi-temperature approach and a 1D harmonic Franck-Condon approach for the multi-molecule spectra of the formamide decomposition process in the 1800-5600 cm(-1) spectral range (C) 2022 Published by Elsevier B.V.
Permanent Link: http://hdl.handle.net/11104/0332391