
%0 Journal Article
%A Easteal, AJ 
%T A Luminescent Probe Study of Water/Acetonitrile Mixtures
%J Australian Journal of Chemistry
%D 1979/02/01
%V 32
%N 2
%P 271-275
%K 
%R https://doi.org/10.1071/CH9790271
%U https://www.publish.csiro.au/paper/CH9790271 
%X Luminescence spectra for 1.0 &#215; 10-2 mol dm-3 solutions of salicylic acid in water, acetonitrile and water/acetonitrile mixtures have been determined. In the wavelength range 300-600 nm, all spectra showed a single broad emission band. The variations of the wavelength of maximum luminescence intensity (&#955;max) and luminescence band half-width (&#916;½) with solvent composition are similar to the composition dependence of these parameters observed previously for solutions of salicylic acid in water/alcohol mixtures. The invariance of &#916;½ with acetonitrile content up to approximately 15 mole% supports earlier conclusions that up to c. 15 mole% acetonitrile is accommodated within cavities in the water structure. The rapid increase in near 15 mole% acetonitrile provides further evidence for a progressive destruction of the water structure as the acetonitrile content is increased beyond c. 15 mole%. 
