Low density and soft matter Figure 1. (a) Picture of the title reaction (b) Mass/charge (m/z) spectra of the ion CH3OH+, without (black line) and with O2 (red line) in the octupole at the oxygen pressure of 1.2 × 10-4 mbar and CE = 0. (c) mass/charge (m/z) spectra of the ion CD3OH+, without (black line) and with O2 (red line) or with 18O2 (blue line) in the octupole. (d) Ratio of CH2OH+ (m/z = 31) over CH3OH+ (m/z = 32) as a function of photon energy (eV). A blue dashed line marks the appearance energy of CH2OH+ from CH3OH+. (e) Minimum energy path of the reaction between methanol cation and molecular oxygen. The green circles indicate the position of the energy minimum M1, the orange circles indicate the position of the absolute minimum M2. The red line in the first panel is the energy reference associated with the reactive molecules, while the blue line indicates the energy of the products. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). M. Satta1, D. Catone2, M. C. Castrovilli3, F. Nicolanti4, A. Cartoni5 1 Institute for the Study of Nanostructured Materials-CNR (ISMN-CNR), Department of Chemistry Sapienza, University of Rome, Rome, Italy 2 Istituto di Struttura della Materia - CNR (ISM-CNR), Rome, Italy 3 Istituto di Struttura della Materia - CNR (ISM-CNR), Monterotondo Scalo, Italy 4 Department of Physics, Sapienza University of Rome, Rome, Italy 5 Department of Chemistry, Sapienza University of Rome, Rome, Italy e-mail: antonella.cartoni@uniroma1.it; mauro.satta@cnr.it Acknowledgments We thank Fabio Zuccaro for assistance during the experiments on the beamline CiPo of Elettra Synchrotron. We acknowledge Elettra Sincrotrone Trieste for providing access to its synchrotron radiation facilities and for financial support. This article is based upon work from COST action CA18212–Molecular Dynamics in the GAS phase (MD-GAS). Original paper M. Satta et al. Molecules 29, 1484 (2024), https://doi.org/10.3390/molecules29071484. Fig. 1 a b c d e Elettra Highlights 2024–2025 43
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