Abstract

The solvation process of two ionic resorcinarenes, sodium C-tetra(ethyl)resorcin[4]arene sulfonate (Na4EtRA) and sodium C-tetra(propyl)resorcin[4]arene sulfonate (Na4PrRA), were studied in aqueous and dimethylsulfoxide (DMSO) solutions. Standard molar properties were determined as a function of concentration and temperature. The studied concentration range were 0.005–0.05 mol·kg−1 and temperature ranges were (278.15–308.15) K for water and (293.15–308.15) K for DMSO. The contribution of CH2 groups was evaluated and the results showed additivity of these groups in aqueous solutions. The results were discussed considering the length of the hydrocarbon chains and the intrinsic compressibility of the macrocyclic compounds.

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