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Barreiro-Lage D, Nicolafrancesco C, Kočišek J, Luna A, Kopyra J, Alcamí M, Huber BA, Martín F, Domaracka A, Rousseau P, Díaz-Tendero S. Controlling the diversity of ion-induced fragmentation pathways by N-methylation of amino acids. Phys Chem Chem Phys 2022; 24:941-954. [PMID: 34913940 DOI: 10.1039/d1cp04097a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We present a combined experimental and theoretical study of the fragmentation of singly and doubly N-methylated glycine (sarcosine and N,N-dimethyl glycine, respectively) induced by low-energy (keV) O6+ ions. Multicoincidence mass spectrometry techniques and quantum chemistry simulations (ab initio molecular dynamics and density functional theory) allow us to characterise different fragmentation pathways as well as the associated mechanisms. We focus on the fragmentation of doubly ionised species, for which coincidence measurements provide unambiguous information on the origin of the various charged fragments. We have found that single N-methylation leads to a larger variety of fragmentation channels than in no methylation of glycine, while double N-methylation effectively closes many of these fragmentation channels, including some of those appearing in pristine glycine. Importantly, the closure of fragmentation channels in the latter case does not imply a protective effect by the methyl group.
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Affiliation(s)
- Darío Barreiro-Lage
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain.
| | - Chiara Nicolafrancesco
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France. .,Synchrotron SOLEIL, LOrme des Merisiers, St Aubin, BP 48, Gif sur Yvette Cedex 91192, France
| | - Jaroslav Kočišek
- J. Heyrovsky Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejskova 3, Prague 18223, Czech Republic
| | - Alberto Luna
- Centro de Computación Científica, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Janina Kopyra
- Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, Siedlce 08-110, Poland
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Bernd A Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
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Renoud J, Indrajith S, Domaracka A, Rousseau P, Moretto-Capelle P, Huber BA, Champeaux JP. Interaction of hydantoin with solar wind minority ions: O 6+ and He 2. Phys Chem Chem Phys 2020; 22:5785-5796. [PMID: 32105280 DOI: 10.1039/c9cp06230k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The laboratory study of prebiotic molecules interacting with solar wind ions is important to understand their role in the emergence of life in the complex context of the astrochemistry of circumstellar environments. In this work, we present the first study of the interaction of hydantoin (C3N2O2H4, 100 a.m.u.) with solar wind minority multi-charged ions: O6+ at 30 keV and He2+ at 8 keV. The fragmentation mass spectra as well as correlation maps resulting from the interaction are presented and discussed in this paper. Prompt and delayed dissociations from metastable states of the ionized molecule have been observed and the corresponding lifetimes measured. Experimental results are completed by quantum Density Functional Theory (DFT) calculations for energies, structures and dynamics (Internal Reaction Coordinates and Dynamic Reaction Coordinates) of the molecule for its different reachable charge states and the major observed fragmentation pathways. These calculations show that the molecule can only support two charges before spontaneously dissociating in agreement with the experimental observations. Calculations also demonstrate that hydantoin's ring opens after double ionization of the molecule which may enhance its reactivity in the background of biological molecule formation in a cirmcumstellar environment. For the major experimentally observed fragmentations (like 44 a.m.u./56 a.m.u. dissociation), Internal Reaction Coordinate (IRC) calculations were performed pointing out for example the important role of hydrogen transfer in the fragmentation processes.
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Affiliation(s)
- Julie Renoud
- Laboratoire Collisions Agrégats et Réactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France.
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