Crown Ethers at the Aqueous Solution-Air Interface: 2. Electrolyte Effects, Ethylene Oxide Hydration and Temperature Behaviour
2011 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 13, 7939-7947 p.Article in journal (Refereed) Published
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, 7939-7947 p.
IdentifiersURN: urn:nbn:se:kth:diva-13783DOI: 10.1039/C0CP02144JISI: 000289567200036ScopusID: 2-s2.0-79955996029OAI: oai:DiVA.org:kth-13783DiVA: diva2:327257
FunderSwedish Research Council
QC20100628 Uppdaterad från Submittet till Published 201105232010-06-282010-06-282011-05-23Bibliographically approved