Impact of anion polarizability on ion pairing in microhydrated salt clusters.

ABSTRACT: Despite longstanding interest in the mechanism of salt dissolution in aqueous media, a molecular level understanding remains incomplete. Here, cryogenic ion trap vibrational action spectroscopy is combined with electronic structure calculations to track salt hydration in a gas phase model system one water molecule at a time. The infrared photodissociation spectra of microhydrated lithium dihalide anions [LiXX'(H₂O) _n ]^- (XX' = I₂, ClI and Cl₂; n = 1-3) in the OH stretching region (3800-2800 cm^-1) provide a detailed picture of how anion polarizability influences the competition among ion-ion, ion-water and water-water interactions. While exclusively contact ion pairs are observed for n = 1, the formation

SUBMITTER: Chakraborty A 

PROVIDER: S-EPMC9668056 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature