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Crown ethers at the aqueous solution–air interface. Part 2. Electrolyte effects, ethylene oxide hydration and temperature behaviour
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (DPC)
2011 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 13, no 17, p. 7939-7947Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2011. Vol. 13, no 17, p. 7939-7947
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:miun:diva-15555DOI: 10.1039/C0CP02144JOAI: oai:DiVA.org:miun-15555DiVA, id: diva2:468288
Available from: 2011-12-20 Created: 2011-12-20 Last updated: 2017-12-08Bibliographically approved

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Publisher's full texthttp://pubs.rsc.org/en/content/articlelanding/2011/cp/c0cp02144j

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Niga, Petru

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