Ozone solvatochromism in selected solvents

The solvatochromism of the ozone Hartley band was studied in 21 different liquids divided in 16 solvents and 5 acids. In all the liquids studied, ozone shows a positive solvatochromism, i.e. a red shift or batochromic shift as function of the polarity of the solvents. In fact, correlations were found between the shift of the ozone band and the polarity of the solvents described by the Onsager polarity function f(n2) or by the solvent polarity parameter ET(30) measured according to Reichardt. The excited dipole moment of ozone was estimated from the experimental data. The ozone solvatochromism in 5 acids including concentrated sulfuric acid and the superacid trifluoromethanesulfonic acid was studied.