Article Dans Une Revue Nature Communications Année : 2025

Non-local X-ray intermolecular radiative decay probes solvation shell of ions in water

Victor Ekholm
Arnaldo Naves De Brito
Ricardo Marinho
Takashi Tokushima
Anirudha Ghosh
  • Fonction : Auteur
Dana Bloß
Andreas Hans
Zhong Yin
Gunnar Öhrwall
Jan-Erik Rubensson
Olle Björneholm
  • Fonction : Auteur
  • PersonId : 1618318

Résumé

Abstract Aqueous solutions are crucial in chemistry, biology, environmental science, and technology. The chemistry of solutes is influenced by the surrounding solvation shell of water molecules, which have different chemical properties than bulk water due to their different electronic and geometric structure. It is experimentally challenging to selectively investigate this property-determining electronic and geometric structure. Here, we report experimental results on the non-local X-ray emission process Intermolecular Radiative Decay, for the prototypical ions Na + and Mg 2+ in water. We show that, in Intermolecular Radiative Decay, an electron from the solvation shell fills a core hole in the solute, and the released energy is emitted as an X-ray photon. We interpret the underlying mechanism using theoretical calculations, and show how Intermolecular Radiative Decay will allow us to meet the challenge of selectively probing the solvation shell from within.

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hal-05396918 , version 1 (03-12-2025)

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Johan Söderström, Lucas M Cornetta, Victor Ekholm, Vincenzo Carravetta, Arnaldo Naves De Brito, et al.. Non-local X-ray intermolecular radiative decay probes solvation shell of ions in water. Nature Communications, 2025, 16 (1), pp.10046. ⟨10.1038/s41467-025-65581-7⟩. ⟨hal-05396918⟩
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