2018
DOI: 10.1021/acssuschemeng.8b01203
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Abstract: Recently, some works claim that hydrophobic deep eutectic solvents could be prepared based on menthol and monocarboxylic acids. Despite of some promising potential applications, these systems were poorly understood, and this work addresses this issue. Here, the characterization of eutectic solvents composed of the terpenes thymol or l­(−)-menthol and monocarboxylic acids is studied aiming the design of these solvents. Their solid–liquid phase diagrams were measured by differential scanning calorimetry in the w… Show more

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Cited by 210 publications
(210 citation statements)
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“…Sustainable HES composed of cheap naturally sourced terpenes (such as menthol and thymol) as hydrogen bond acceptor and fatty acids (from caprylic to stearic acids) as hydrogen bond donor were shown to be highly hydrophobic. 7,10 Due to the weak hydrogen bonding interactions between the two compounds, such mixtures present only a slight deviation from an ideal solution behaviour, in opposition to what is usually observed for 'deep' eutectic solvents. This lack of dominant hydrogen bond interactions results in a low viscosity HES suitable for solvent extraction applications.…”
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confidence: 92%
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“…Sustainable HES composed of cheap naturally sourced terpenes (such as menthol and thymol) as hydrogen bond acceptor and fatty acids (from caprylic to stearic acids) as hydrogen bond donor were shown to be highly hydrophobic. 7,10 Due to the weak hydrogen bonding interactions between the two compounds, such mixtures present only a slight deviation from an ideal solution behaviour, in opposition to what is usually observed for 'deep' eutectic solvents. This lack of dominant hydrogen bond interactions results in a low viscosity HES suitable for solvent extraction applications.…”
mentioning
confidence: 92%
“…Furthermore, the starting compounds are biodegradable and approved for human consumption by various food and drug agencies, turning the resulting HES of interest for a wide range of industries. In this work, sustainable HES based on menthol or its aromatic counterpart thymol combined with long chain carboxylic acids (C n H (2n+1) OOH; n = 8, 10,12,14, 16, 18) (Fig. S1 in the ESI †), are evaluated for the extraction of Cu(II) and its separation from other transition metals, namely Co(II) and Ni(II).…”
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confidence: 99%
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