Volumetric and Viscometric Studies of N,N′-Bis(salicylaldehyde)-1,3-diaminopropane Schiff Base (Salpr) in Ionic Liquid + DMF solutions

Abstract

The apparent molar volumes and viscosities of N,N -bis(salicylaldehyde)-1,3-diaminopropane Schiff base (Salpr) have been determined in ionic liquid {1-pentyl-3-methylimidazolium bromide ([PnMIm]Br)} + N,N-dimethylformamide (DMF) solutions at 298.15 K from density and viscosity measurements using a vibrating tube densimeter and Übbelohde type viscometer, respectively. These data have been used to calculate standard partial molar volumes, V 0 φ , transfer partial molar volumes, tr V 0 , and viscosity B-coefficients of the solutions. The transfer partial molar volumes are negative, and decrease with increasing the concentration of ionic liquid for all of the investigated solutions. It found that this ionic liquid interacts strongly with the Schiff base (Salpr) and has desolvation effect on the Schiff base molecules.

Density and Viscosity of LiCl, LiBr, LiI and Kcl in Aqueous Methanol at 313.15K

“…The pycnometer was placed in a temperature-controlled water bath with thermal stability of ± 0.01K for 15 min to attain thermal equilibrium. An Ubbelohde suspended level viscometer was used to measure viscosities [20][21][22] . Water conductivity was used to calibrate the device.…”