Sudden structural change at an air/binary liquid interface : sum frequency study of the air/acetonitrile-water interface

We report the first observation of a sharp structural change in an air/acetonitrile–water interface as the solution composition varies; the abruptness of which suggests an interfacial phase transition. The structural change is manifested by shifts in the frequency and in the polarization of the sign...

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Bibliographic Details
Published in:The Journal of chemical physics 1993-03, Vol.98 (6), p.5099-5101
Main Authors: ZHANG, D, GUTOW, J. H, EISENTHAL, K. B, HEINZ, T. F
Format: Article
Language:English
Subjects:
ACETONITRILE
AIR
BINARY MIXTURES
CHEMICAL COMPOSITION
Condensed matter: structure, mechanical and thermal properties
DISPERSIONS
ELECTROMAGNETIC RADIATION
Exact sciences and technology
FLUIDS
GASES
HYDROGEN COMPOUNDS
INFRARED RADIATION
INTERFACES
MATERIALS SCIENCE
Mechanical and acoustical properties
adhesion
MIXTURES
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
Physics
POLARIZATION
RADIATIONS 360602 > Other Materials-- Structure & Phase Studies
SIGNALS
Solid surfaces and solid-solid interfaces
Solid-fluid interfaces
SPECTRAL SHIFT
STRUCTURE FACTORS
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
VARIATIONS
VISIBLE RADIATION
WATER
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Summary:We report the first observation of a sharp structural change in an air/acetonitrile–water interface as the solution composition varies; the abruptness of which suggests an interfacial phase transition. The structural change is manifested by shifts in the frequency and in the polarization of the signal from the acetonitrile molecules in the interface observed using infrared+visible surface sum frequency generation.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.464933