Abstract

In the present study, the design, synthesis and biodegradability assessment of 14 protic ionic liquids (PILs), among which nine are presented for the first time in bibliography, is presented. Furthermore, since PILs are considered as alternative green solvents with favorable properties for a variety of applications, we herein report the study of two of the most important PILs physicochemical properties, thermal behavior (melting, cold crystallization and glass transition temperatures) and viscosity. The effect of selected structural features of the PILs ions (such as the aromatic and alicyclic ring, the ions size and the presence of hydroxyl groups) on the above-mentioned properties has been also discussed.

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