Issue 17, 2011
From the journal:

Physical Chemistry Chemical Physics

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

Petru Niga,a   C. Magnus Johnson,a   Jeremy G. Freyc  and  Mark W. Rutland*ab  

* Corresponding authors

a School of Chemical Science and Engineering, Royal Institute of Technology, Stockholm, Sweden
E-mail: mark@kth.se, niga@kth.se
Fax: +46 8 208998
Tel: +46 8 7909914

b Institute for Surface Chemistry, Stockholm, Sweden

c School of Chemistry, University of Southampton, Southampton, UK
E-mail: J.G.Frey@soton.ac.uk
Fax: +44 23 8059 3781
Tel: +44 23 8059 3209

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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Article information

DOI
https://doi.org/10.1039/C0CP02144J
Article type
Paper
Submitted
13 Oct 2010
Accepted
04 Mar 2011
First published
29 Mar 2011

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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