Surfactant Effect on the Hydrophobic Interaction between Rhodamine 6G and Sodium Tetraphenylborate

Surfactant Effect on the Hydrophobic Interaction between Rhodamine 6G and Sodium Tetraphenylborate

The hydrophobic interaction occurring between rhodamine 6G and tetraphenylborate was investigated spectroscopically by varying the medium with the addition of surfactants or ethanol. The ion aggregates formed between the two ions were destroyed by the additives. The dye existed as monomeric species in the presence of a cationic surfactant whereas it was incorporated with anionic and nonionic surfactants. For the complete dissociation more than the critical micelle concentration (cmc) was required with a nonionic surfactant while less than cmc was necessary with the others.