Abstract

In this work, evolution of structural properties of anhydrous and hydrated alkali halide clusters are studied using synchrotron radiation based photoelectron spectroscopy. Alkali metal core level spectra of small anhydrous RbCl, RbBr, CsCl and CsBr clusters indicate a NaCl structure. For larger CsBr clusters a structural phase transition to CsCl structure is likely the case. Alkali halide core level spectra of mixed RbBr-water clusters indicate that at dilute concentration the salt is dissolved by the water cluster but ion pairing increases with concentration. Modeling of gas phase cluster formation and electronic structure calculations of core level chemical shifts are used to interpret the experimental spectra.

Osajulkaisut / Original papers

Osajulkaisut eivät sisälly väitöskirjan elektroniseen versioon / Original papers are not included in the electronic version of the dissertation.

1. Hautala, L., Jänkälä, K., Mikkelä, M.-H., Tchaplyguine, M., & Huttula, M. (2015). Surface site coordination dependent responses resolved in free clusters: applications for neutral sub-nanometer cluster studies. Physical Chemistry Chemical Physics, 17(10), 7012–7022. https://doi.org/10.1039/c4cp05422a

2. Hautala, L., Jänkälä, K., Löytynoja, T., Mikkelä, M.-H., Prisle, N., Tchaplyguine, M., & Huttula, M. (2017). Experimental observation of structural phase transition in CsBr clusters. Physical Review B, 95(4). https://doi.org/10.1103/physrevb.95.045402

   Rinnakkaistallennettu versio / Self-archived version

3. Hautala, L., Jänkälä, K., Mikkelä, M.-H., Turunen, P., Prisle, N. L., Patanen, M., … Huttula, M. (2017). Probing RbBr solvation in freestanding sub-2 nm water clusters. Physical Chemistry Chemical Physics, 19(36), 25158–25167. https://doi.org/10.1039/c7cp04398h

   Rinnakkaistallennettu versio / Self-archived version