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Issue 17, 2011
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Crown ethers at the aqueous solution–air interface. Part 2. Electrolyte effects, ethylene oxide hydration and temperature behaviour

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Abstract

Vibrational Sum Frequency Spectroscopy (VSFS) was employed to study adsorbing films of 4-Nitro Benzo-15-Crown-5 (NB15C5) and Benzo-15-Crown-5 (B15C5) at the aqueous solution–air interface. The surface of the solution is strongly influenced by the presence of crown ether species. Changes in the orientation of NB15C5 were monitored as a function of solution concentration, by targeting the ratio of peak intensities of the CN and NO2 vibrational modes. The water of hydration has also been probed as a function of crown concentration, salt concentration, and temperature. The latter study strongly suggests that the surface can be treated as a charged interface, and that the associated ordered water decreases with increasing ionic strength of the bulk solution.

Graphical abstract: Crown ethers at the aqueous solution–air interface. Part 2. Electrolyte effects, ethylene oxide hydration and temperature behaviour

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Publication details

The article was received on 13 Oct 2010, accepted on 04 Mar 2011 and first published on 29 Mar 2011


Article type: Paper
DOI: 10.1039/C0CP02144J
Citation: Phys. Chem. Chem. Phys., 2011,13, 7939-7947
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    Crown ethers at the aqueous solution–air interface. Part 2. Electrolyte effects, ethylene oxide hydration and temperature behaviour

    P. Niga, C. M. Johnson, J. G. Frey and M. W. Rutland, Phys. Chem. Chem. Phys., 2011, 13, 7939
    DOI: 10.1039/C0CP02144J

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