Intradiffusion coefficients were measured at 25°C by the PGSE-NMR technique for the binary systems: water-urea, water-(N-methylurea), water-(N,N′-dimethylurea). The collected data have been combined with osmotic and mutual diffusion coefficients present in the literature to calculate the velocity correlation coefficients (VCC). The results have been interpreted in terms of molecular interactions, showing that alkylureas have a structuring effect on the aqueous medium. The hydration number of the solutes were estimated.
Transport properties of urea and alkylureas aqueous solutions. A velocity correlation study / L., Costantino; D'Errico, Gerardino; O., Ortona; V., Vitagliano. - In: JOURNAL OF MOLECULAR LIQUIDS. - ISSN 0167-7322. - STAMPA. - 84:2(2000), pp. 179-191. [10.1016/S0167-7322(99)00180-4]
Transport properties of urea and alkylureas aqueous solutions. A velocity correlation study
D'ERRICO, GERARDINO;
2000
Abstract
Intradiffusion coefficients were measured at 25°C by the PGSE-NMR technique for the binary systems: water-urea, water-(N-methylurea), water-(N,N′-dimethylurea). The collected data have been combined with osmotic and mutual diffusion coefficients present in the literature to calculate the velocity correlation coefficients (VCC). The results have been interpreted in terms of molecular interactions, showing that alkylureas have a structuring effect on the aqueous medium. The hydration number of the solutes were estimated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
