Conductometric and fluorescence probe investigations of molecular interactions between dodecyltrimethylammonium bromide and dipeptides

摘要: The effect of five dipeptides (glycylglycine, glycyl-l-valine, glycyl-l-leucine, glycyl-l-glutamine, and l-alanyl-l-glutamine) on the micellar properties catonic surfactant dodecyltrimethylammonium bromide (DTAB) has been investigated by electrical conductivity fluorescence spectroscopy. From data, critical concentration (c cmc), counterion binding constant (β), thermodynamic parameters micellization (ΔG m o , ΔH ΔS ) have calculated. DTAB depends upon their nature as well temperature used to study interactions present in systems. Enthalpy–entropy compensation also observed. pyrene spectra were an index for estimation micropolarity produced interaction with aggregation behavior DTAB. Comparison between different types surfactants dipeptide showed that order strength these is TX-100 < SAS SDS.