Temperature evolution in IR action spectroscopy experiments with sodium doped water clusters

0537137 - ÚFCH JH 2022 RIV GB eng J - Článek v odborném periodiku
Becker, D. - Dierking, Ch. - Suchan, P. - Zurheide, F. - Lengyel, J. - Fárník, Michal - Slavíček, P. - Buck, U. - Zeuch, T.
Temperature evolution in IR action spectroscopy experiments with sodium doped water clusters.
Physical Chemistry Chemical Physics. Roč. 23, č. 13 (2021), s. 7682-7695. ISSN 1463-9076. E-ISSN 1463-9084
Institucionální podpora: RVO:61388955
Klíčová slova: spectroscopy * clusters * size-resolved studies
Obor OECD: Physical chemistry
Impakt faktor: 3.945, rok: 2021
Způsob publikování: Open access

The combination of supersonic expansions with IR action spectroscopy techniques is the basis of many successful approaches to study cluster structure and dynamics. The effects of temperature and temperature evolution are important with regard to both the cluster synthesis and the cluster dynamics upon IR excitation. In the past the combination of the sodium doping technique with IR excitation enhanced near threshold photoionization has been successfully applied to study neutral, especially water clusters. In this work we follow an overall examination approach for inspecting the interplay of cluster temperature and cluster structure in the initial cooling process and in the IR excitation induced heating of the clusters. In molecular simulations, we study the temperature dependent photoionization spectra of the sodium doped clusters and the evaporative cooling process by water molecule ejection at the cluster surface. We present a comprehensive analysis that provides constraints for the temperature evolution from the nozzle to cluster detection in the mass spectrometer. We attribute the IR action effect to the strong temperature dependence of sodium solvation in the IR excited clusters and we discuss the effects of geometry changes during the IR multi-photon absorption process with regard to application prospects of the method.

Trvalý link: http://hdl.handle.net/11104/0314884