Association equilibria of some 10-N-alkyl 3,6-bis dimethylamino acridinium salts in aqueous solution

Abstract

The association equilibrium of three 10-N-alkyl derivatives of acridine orange in aqueous solution has been studied spectrophotometrically. The ΔF_D, ΔH_D, and ΔS_D of dimerization have been computed through the experimental light absorption spectra.

The results are in favour of the assumption that hydrophobic interactions play a relevant role on the dye stacking in aqueous solution.