Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 125, Issue 22, Pages 4750-4759Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.1c01539
Keywords
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Funding
- Academy of Finland [296338, 306984, 328467, 326291]
- Finnish Cultural Foundation, North Ostrobothnia Regional fund [60192221]
- Deutsche Forschungsgemeinschaft (DFG) [328961117.SFB 1319 ELCH]
- Graduate School of Functional Materials and Technologies, University of Tartu [2014-2020.4.01.16-0027]
- Centres of Excellence project Advanced materials and high-technology devices for sustainable energetics, sensorics and nanoelectronics [TK141 (20142020.4.01.15-0011)]
- Swedish Research council [2018-07152]
- Swedish Governmental Agency for Innovation Systems [2018-04969]
- Formas [2019-02496]
- Academy of Finland (AKA) [296338, 306984, 328467, 328467, 296338, 306984] Funding Source: Academy of Finland (AKA)
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This study used electron spectroscopy to investigate the electronic and structural properties of KCl doped in gas-phase water clusters, revealing the unique solvation properties of ions in nanoaqueous environments and the sensitivity of electronic structure to varying solvation configurations.
The solvation of alkali and halide ions in the aqueous environment has been a subject of intense experimental and theoretical research with multidisciplinary interests; yet, a comprehensive molecular-level understanding has still not been obtained. In recent years, electron spectroscopy has been increasingly applied to study the electronic and structural properties of aqueous ions with implications, especially in atmospheric chemistry. In this work, we report core and valence level (Cl 2p, Cl 3p, and K 3p) photoelectron spectra of the common alkali halide, KCl, doped in gas-phase water clusters in the size range of a few hundred water molecules. The results indicate that the electronic structure of these nanosolutions shows a distinct character from that observed at the liquid-vapor interface in liquid microjets and ambient pressure setups. Insights are provided into the unique solvation properties of ions in a nanoaqueous environment, emerging properties of bulk electrolyte solutions with growing cluster size, and sensitivity of the electronic structure to varying solvation configurations.
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