Effect of solvent on the volumetric behavior of N,N′-salicylidenephenyl diamine (Salophen) Schiff base at different temperatures (288.15–318.15) K

• Densities of binary mixtures of Salophen + organic solvents have been measured.
• Using the density data, volumetric properties of mixtures have been calculated.
• The Vϕ0 values of Salophen Schiff base were compared in different organic solvents.
• The results showed that the Salophen in these solvents predominantly acts as a structure breaker.
• The interaction volumes (Vint) of Salophen in different solvents were calculated using scaled particle theory.

Densities of binary mixtures containing N,N′-salicylidenephenyl diamine (Salophen) + organic solvents {dimethylsulfoxide (DMSO), N,N-dimethylacetamide (DMA), 1,4-dioxacyclohexane (1,4-dioxane), and oxolane (THF)} have been measured at 10 K intervals from 288.15 K to 318.15 K. Using these data, apparent molar volumes (VϕVϕ), standard partial molar volumes (Vϕ0), standard partial molar isobaric expansivity (Eϕ0), Hepler's constant (∂2Vϕ0/∂T2)p, and isobaric thermal expansion coefficient (α) have been calculated for all the mixtures. The values of interaction volumes (Vint), and cavity volumes (Vcav) have also been estimated using the scaled particle theory [20]. The results show that Salophen in the studied organic solvents predominantly acts as a structure-breaker.