Application of new strategies for supramolecular self-assembly can significantly impact the properties and/or functions of supramolecular polymers. To realize a facial strategy for the development of solvent-free supramolecular polymers in bulk, "deep eutectic solvents" were employed. Cyclodextrins and natural acids were used to prepare deep eutectic supramolecular polymers (DESPs). Deep eutectic solvents have special characteristics that endow DESPs with unique macroscopic properties and excellent processability. DESPs exhibit supramolecular adhesion and temperaturedependent behavior originating from the combined effects of deep eutectic solvents and supramolecular polymerization. Because DESPs are solvent-free and display interesting macroscopic properties, they have potential as new adaptive materials.

BACKGROUND: The aqueous two-phase extraction (ATPE) based on organic solvent and inorganic salt was considered a promising method in the extraction, enrichment, and purification field. Ionic liquids (ILs) used as additives to the aqueous two-phase system (ATPS) can improve the extraction yield. RESULTS: In this study, sevenILs were added to the ethanol/ammonium sulfate ATPS and used for the salting-out extraction (SOE) of sinomenine from Sinomenium acutum. The IL [C 2 OHmim]FeCl 4 was screened as the optimal additive, then the influencing factors IL amount, ethanol concentration, salt concentration, and temperature were investigated. The maximum extraction efficiency of 96.4% was obtained under the following conditions: 23.06 wt% ethanol concentration, 27.28 wt% (NH 4 ) 2 SO 4 concentration, 4.0 wt% [C 2 OHmim]FeCl 4 and 40 ∘ C temperature. Moreover, the components in the SOE system can be recycled after extraction. CONCLUSION: Thus, this ATPS had lower cost and higher extraction ability, and it is feasible to scale up using a small amount of ILs. This system can also be used in the extraction of some other important active compounds from natural plant resources.

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