A eutectic system forms when two or more substances reorganize into a superlattice that has a lower melting point than each of the individual components. Deep eutectic solvents (DESs) are environmentally friendly solvents often used for the dissolution, extraction, and separation of chemical compounds. Instead of using DESs for extraction, hydrogen bond acceptors (HBAs) or hydrogen bond donors (HBDs) can be used to form a deep eutectic system (DESys) directly with the target compound for one-step dissolution and extraction. The feasibility of direct formation of a DESys for high efficiency extraction was demonstrated with turmeric as the extraction target. The data showed that the target compounds indeed directly interacted with HBAs (and for other compounds, HBDs), which increases process efficiency and reduces the time required for target compounds to compete with another HBD (or HBA) to form hydrogen bonds. In addition, the results showed that the target compounds have different physicochemical properties in DESys and DES, which resulted in different analytical behaviors of the targets. This research may lead to changes in how eutectic systems are used and the development of new applications based on the formation of DESys.

中文翻译：

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通过直接形成共晶体系提取天然产物

当两种或多种物质重组为熔点低于每个单独组分的超晶格时，共晶系统就形成了。深共熔溶剂 (DES) 是一种环境友好型溶剂，常用于化合物的溶解、萃取和分离。可以使用氢键受体 (HBA) 或氢键供体 (HBD) 代替 DES 进行萃取，直接与目标化合物形成深共晶体系 (DESys)，进行一步溶解和萃取。以姜黄为提取目标证明了直接形成 DESys 以进行高效提取的可行性。数据表明，目标化合物确实与 HBA（以及其他化合物，HBD）直接相互作用，这提高了工艺效率并减少了目标化合物与另一种 HBD（或 HBA）竞争形成氢键所需的时间。此外，结果表明目标化合物在 DESys 和 DES 中具有不同的理化性质，导致目标的不同分析行为。这项研究可能会导致共晶系统使用方式的变化以及基于 DESys 形成的新应用的开发。