Communication: Infrared spectroscopy of salt-water complexes

Tandy, Jon, Feng, Cheng, Boatwright, Adrian, Sarma, Gautam, Sadoon, Ahmed M., Shirley, Andrew, Das Neves Rodrigues, Natercia, Cunningham, Ethan M., Yang, Shengfu, Ellis, Andrew M. and others. (2016) Communication: Infrared spectroscopy of salt-water complexes. The Journal of Chemical Physics, 144 (12). Article Number 121103. ISSN 0021-9606. (doi:10.1063/1.4945342) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:92322)

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Official URL: https://doi.org/10.1063/1.4945342

Abstract

To explore how the ion-pair in a single salt molecule evolves with the addition of water, infrared (IR) spectra of complexes composed of NaCl and multiple water molecules have been recorded for the first time. The NaCl(H2O)n complexes were formed and probed in liquid helium nanodroplets, and IR spectra were recorded for n = 1 → 4. The spectra for n = 1, 2, and 3 are consistent with formation of the lowest energy contact-ion pair structures in which each water molecule forms a single ionic hydrogen bond to an intact Na+Cl− ion-pair. Alternative structures with hydrogen bonding between water molecules become energetically competitive for n = 4, and the IR spectrum indicates likely the coexistence of at least two isomers.

Item Type:	Article
DOI/Identification number:	10.1063/1.4945342
Subjects:	Q Science > QD Chemistry > QD473 Physical properties in relation to structure
Divisions:	Divisions > Division of Natural Sciences > Chemistry and Forensics
Depositing User:	Jon Tandy
Date Deposited:	08 Mar 2022 14:45 UTC
Last Modified:	17 Aug 2022 12:22 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/92322 (The current URI for this page, for reference purposes)

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