Highly efficient dissolution of xylan in ionic liquid-based deep eutectic solvents

Kamlet–Taft Parameters of Deep Eutectic Solvents and Their Relationship with Dissolution of Main Lignocellulosic Components

“…Moreover, a positive linear relationship between α and the extraction efficiency of lignin was found when using different ChCl-based DESs to pretreat pine wood . In addition, our previous works showed that the solubility of lignin had a positive correlation with α and π* of the DESs, while the solubility of xylan had a positive correlation with β. , …”

“…Of the developed solvent systems, deep eutectic solvents (DESs) have been recognized as an emerging class of functional solvents for the dissolution of lignocellulosic components. Generally, DESs are composed of two components via the hydrogen bonding interaction to generate a eutectic mixture, and the two components are hydrogen-bond donor (HBD) and hydrogen-bond acceptor (HBA), respectively. , The DESs designed by selecting suitable HBDs and HBAs of different properties could enable them to possess various unique advantages, e.g., strong solvation ability, good designability, low cost, facile preparation, high biocompatibility, etc. − These characteristics of DESs promote the continually growing interest in constructing efficient DESs to dissolve cellulose, hemicellulose, or lignin. − As reported, DESs can be defined as the mixture of two or more pure compounds with a eutectic point temperature below that for an ideal liquid mixture, showing significantly negative deviations from ideality . More importantly, the composition of DESs should be in a certain range, not just in a fixed stoichiometric proportion .…”

History repeats itself again: Will the mistakes of the past for ILs be repeated for DESs? From being considered ionic liquids to becoming their alternative: the unbalanced turn of deep eutectic solvents

“…[30][31][32][33][34] On the other hand, mixtures of imidazole-based ILs, [C 2 C 1 im]Cl, [C 4 C 1 im]Cl, [C 6 C 1 im]Cl, with a large variety of HBDs have been widely prepared and used in several applications. [35][36][37][38][39][40][41] The relevant role of the chloride anion, present in the IL, in the establishment of hydrogen bond donors in DESs has also been addressed. [42][43][44][45][46][47][48][49][50] Even more, mixtures of ILs could give rise to new DESs.…”

“…Furthermore, a cost analysis showed that the high price of 293 The number of papers dealing with hemicellulose solubilization using DESs is very limited. These include works that use DESs comprising toxic chemicals, such as thiourea, 294 or acid DESs [295][296][297] that degrade the hemicellulose structure with similar issues to those reported for ILs.…”

Room-temperature conversion of CO2 into quinazoline-2,4(1H,3H)-dione using deep eutectic solvents at atmospheric pressure with high efficiency

“…18 Liu et al found that protic ILs could serve as efficient catalysts for the synthesis of quinazoline-2,4(1 H ,3 H )-dione with 97% yield at room temperature and atmospheric pressure. 15 Beside CO 2 capture and conversion, ILs could also be favourable media for biomass utilization, 26 SO 2 uptake, 27 NO x absorption, 28 NH 3 separation 8,29–31 and lithium-ion batteries recovery. 32…”