Interaction of glycine with cationic, anionic, and nonionic surfactants at different temperatures: a volumetric, viscometric, refractive index, conductometric, and fluorescence probe study

A number of thermodynamic parameters viz. apparent molar volumes, phi(nu), partial molar volumes, phi(0)(nu), transfer volumes, phi(0)(nu)(tr) , Falkenhagen coefficients, A, Jones-Dole coefficients, B, free energies per mole of solute,Delta mu(0#)(1), and per mole of solvent,Delta mu(0#)(2), molar refraction, R-D, and limiting molar conductivity, Lambda(0)(m), have been calculated by using the experimentally measured densities, rho, viscosities, eta, refractive indices, n(D), and specific conductivities, kappa, data of glycine (0.02-0.10 m) in 0.01 m aqueous sodium dodecyl sulphate, cetyltrimethylammonium bromide, and triton X-100 (TX-100) solutions at 298.15, 303.15, 308.15, and 313.15 K. The above calculated parameters were found to be sensitive towards the interactions prevailing in the studied amino acid-surfactant-water systems. Moreover, fluorescence study using pyrene as a photophysical probe has also been carried out, the results of which support the conclusions obtained from other techniques.