Journal
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
Volume 35, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.cogsc.2022.100612
Keywords
Green solvents; Hydrogen bonding; Solid-liquid equilibrium; Terpenes; Thymol; Trioctylphosphine oxide
Funding
- national funds through the FCT (PIDDAC) [UIDB/50011/2020, UIDP/50011/2020, LA/P/0006/2020]
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This article provides guidelines for the rational design of Type V deep eutectic solvents and reviews their recent applications, with emphasis on the importance of selecting suitable hydrogen bond donors and acceptors to achieve non-ideality in the liquid phase.
Type V deep eutectic solvents are a novel class of sustainable solvents. They are prepared by physically mixing solid, non-ionic components and are characterized by strong negative deviations from thermodynamic ideality. This work provides guidelines for the rational design of these solvents and reviews some of their recent applications. Emphasis is given on the choice of hydrogen bond donors and acceptors to achieve the necessary liquid phase non-ideality, namely on the use of pairs of molecules with high polarity asymmetry, and stresses the importance of assessing their solid-liquid phase diagrams. Polymorphism and cocrystal formation are also briefly addressed, together with predictive methodologies that have been developed to estimate their properties.
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