Communication: Infrared spectroscopy of salt-water complexes

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Tandy, Jonathan D. ; Feng, Cheng ; Boatwright, Adrian ; Sarma, Gautam ; Sadoon, Ahmed M. ; Shirley, Andrew ; Rodrigues, Natercia Das Neves ; Cunningham, Ethan M. ; Yang, Shengfu ; Ellis, Andrew M.

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.
  • References (27)
    27 references, page 1 of 3

    1B. E. Conway, Ionic Hydration in Chemistry and Biophysics (Elsevier Scientific Publishing Company, Amsterdam, 1981).

    2Y. Marcus, Ion Solvation (Wiley, New York, 1985).

    3J. Burgess, Ions in Solution: Basic Principles of Chemical Interactions (Ellis Horwood, New York, 1988).

    4R. S. Eisenberg, Physiology 28, 28 (2013).

    5M. Eigen and K. Z. Tamm, Elektrochemische 66, 93 (1962).

    6Y. Marcus and G. Hefter, Chem. Rev. 106, 4585 (2006).

    7A. Gutberlet, G. Schwaab, Ö Birer, M. Masia, A. Kaczmarek, H. Forbert, M. Havenith, and D. Marx, Science 324, 1545 (2009).

    8D. Skvortsov, S. J. Lee, M. Y. Choi, and A. F. Vilesov, J. Phys. Chem. A 113, 7360 (2009).

    9S. D. Flynn, D. Skvortsov, A. M. Morrison, T. Liang, M. Y. Choi, G. E. Douberly, and A. F. Vilesov, J. Phys. Chem. Lett. 1, 2233 (2010).

    10A. M. Morrison, S. D. Flynn, T. Liang, and G. E. Douberly, J. Phys. Chem. A 114, 8090 (2010).

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