Kinetic and Spectrophotometric Studies of Rhodamine 6G Dimerization in Aqueous Solution

Abstract

The dimerization reaction of dye, Rhodamine 6G, in aqueous solution was studied spectrophotometrically and kinetically: the equilibrium constant and the rate constants were found to be K=1.6×103 M−1, kf=1.1×109 M−1 s−1, and kb=7.0×105 s−1, respectively, at 15 °C. These rate constants, and those of other dyes are discussed. The effect of the ionic strength was also studied.