Pickup and reactions of molecules on clusters relevant for atmospheric and interstellar processes

0538221 - ÚFCH JH 2022 RIV GB eng J - Journal Article
Fárník, Michal - Fedor, Juraj - Kočišek, Jaroslav - Lengyel, J. - Pluhařová, Eva - Poterya, Viktoriya - Pysanenko, Andriy
Pickup and reactions of molecules on clusters relevant for atmospheric and interstellar processes.
Physical Chemistry Chemical Physics. Roč. 23, č. 5 (2021), s. 3195-3213. ISSN 1463-9076. E-ISSN 1463-9084
Institutional support: RVO:61388955
Keywords : clusters * reactions * atoms
OECD category: Physical chemistry
Impact factor: 3.945, year: 2021
Method of publishing: Open access

In this perspective, we review experiments with molecules picked up on large clusters in molecular beams with the focus on the processes in atmospheric and interstellar chemistry. First, we concentrate on the pickup itself, and we discuss the pickup cross sections. We measure the uptake of different atmospheric molecules on mixed nitric acid–water clusters and determine the accommodation coefficients relevant for the aerosol generation in the Earth’s atmosphere. Then the coagulation of the adsorbed molecules on the clusters is investigated. In the second part of this perspectives, we review examples of different processes triggered by UV-photons or electrons in the clusters with embedded molecules. We start with the photodissociation of hydrogen halides and Freon CF2Cl2 on ice nanoparticles in connection with the polar stratospheric ozone depletion. Next, we mention reactions following the excitation and ionization of the molecules adsorbed on clusters. The first ionization-triggered reaction observed between two different molecules picked up on the cluster, was the proton transfer between methanol and formic acid deposited on large argon clusters. Finally, negative ion reactions after slow electron attachment are illustrated by two examples: mixed nitric acid–water clusters, and hydrogen peroxide deposited on large ArN and (H2O)N clusters. The selected examples are discussed from the perspective of the atmospheric and interstellar chemistry, and several future directions are proposed.

Permanent Link: http://hdl.handle.net/11104/0316045