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

Petru Niga | Zendy; Claes Johnson | Zendy; Jeremy G. Frey | Zendy; Mark W. Rutland | Zendy

Open Access

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

Author(s) -

Petru Niga,

Claes Johnson,

Jeremy G. Frey,

Mark W. Rutland

Publication year - 2011

Publication title -

physical chemistry chemical physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.053

H-Index - 239

eISSN - 1463-9084

pISSN - 1463-9076

DOI - 10.1039/c0cp02144j

Subject(s) - aqueous solution , ethylene oxide , chemistry , electrolyte , crown ether , ethylene glycol , ionic strength , oxide , salt (chemistry) , ionic bonding , analytical chemistry (journal) , inorganic chemistry , ion , chromatography , organic chemistry , electrode , copolymer , polymer

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 NO(2) 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.

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