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Title: Infrared spectroscopy of salt-water complexes
Authors: Ellis, Andrew M.
Tandy, Jon
Feng, Cheng
Boatwright, Adrian
Sarma, Gautam
Sadoon, Ahmed M.
Shirley, Andrew
Das Neves Rodrigues, Natercia
Cunningham, Ethan
Yang, Shengfu
First Published: 30-Mar-2016
Publisher: American Institute of Physics
Citation: Journal of Chemical Physics, 2016, 144, 121103
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.
DOI Link: 10.1063/1.4945342
ISSN: 0021-9606
eISSN: 1089-7690
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2016 AIP Publishing LLC. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Chemistry

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