- Matteo Tiecco University of Perugia ,
- Antonio Grillo University of Perugia ,
- Edoardo Mosconi Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta” ,
- Waldemar Kaiser Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta” ,
- Tiziana Del Giacco University of Perugia ,
- Raimondo Germani University of Perugia
Deep Eutectic Solvents (DESs) are increasing their relevance thanks to their ecologically favourable properties, their interesting structural features and their catalytic properties. In this paper we present three novel hydrophobic DESs mixtures prepared by mixing thymol with water, with urea and with phenylacetic acid. These natural DESs represent important advances in the development of green DESs liquids: Thymol/Water mixture is the first binary, water-based DES with hydrophobic properties; in Thymol/Urea DES, urea and its chelating properties were put in a water-separable phase; finally, Thymol/Phenylacetic acid DES is a mixture of two hydrogen-bond donor molecules showing hydrophobic and slightly acidic properties. The hydrogen bond properties within the different mixtures were investigated via DFT, while ab initio molecular dynamics results showed a substantial interaction between thymol and water in the Thymol/Water DES. Moreover, the investigated DESs show excellent extraction properties of heavy metal salts and phenols from aqueous phases.
Experimental Part was put in the main Manuscript