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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 temperature‐dependent 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. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • ATPS was first developed for the salting-out extraction of ursolic acid from C. songaricum. • DESs used as adjuvants with small amount can significantly improve the extraction. • Ursolic acid can be recovered from the solution using water as the anti-solvent. • This method has high extraction efficiency, low cost and good environmental friendliness. Abstract Deep eutectic solvents (DESs) were considered as a good alternative to conventional ionic liquids (ILs) used in the extraction and separation field. Therefore, the aqueous two-phase system (ATPS) formed by ethanol and salt was used for the salting-out extraction (SOE), preconcentration, and preliminary purification of ursolic acid (UA) from Cynomorium songaricum Rupr. (C. songaricum) using various DESs as adjuvants in this study. The DES choline chloride-oxalic acid (ChCl-OA) was screened as the optimal adjuvant, which can play a dual role of enhancing the extraction yield in the preparation of the crude extract and adjusting the distribution of UA in ATPS. The factors influencing the solid-liquid extraction, including type and amount of DESs, ethanol concentration, and solid-liquid ratio were investigated. Then, the major factors influencing the SOE, including salt type and concentration, extraction temperature, and system pH were also optimized. The maximum extraction yield of 108 mg/g in the solid-liquid extraction and the maximum extraction efficiency of >99% in the SOE were obtained, respectively. The recovery of UA from the solution was done using water as the anti-solvent with almost 96.6% UA being recovered, the purity of recovered UA reached 73.5%. This SOE using DESs as adjuvants has the advantages of high extraction efficiency, simple operation, low cost and good environmental friendliness, which is potential for the scale-up application. [ABSTRACT FROM AUTHOR]

Keywords: deep eutectic solvents; materials science; polymers; self-assembly; supramolecular chemistry EN deep eutectic solvents materials science polymers self-assembly supramolecular chemistry 5600 5600 1 03/03/21 20210308 NES 210308 In this Communication, the description of a preparation method was unclear and misleading. Deep eutectic solvents, materials science, polymers, self-assembly, supramolecular chemistry In the left column on page 11872, the sentence "Deep eutectic supramolecular polymers ( B DESP b s) based on cyclodextrins were prepared by simply heating the mixtures of cyclodextrins and natural acids" should be amended to read "Deep eutectic supramolecular polymers ( B DESP b s) based on cyclodextrins were prepared by simply heating the aqueous solutions of cyclodextrins and acids. [Extracted from the article]

Keywords: deep eutectic solvents; materials science; polymers; self-assembly; supramolecular chemistry EN deep eutectic solvents materials science polymers self-assembly supramolecular chemistry 5660 5660 1 03/03/21 20210308 NES 210308 In this Communication, the description of a preparation method was unclear and misleading. In the left column on page 11970, the sentence "Deep eutectic supramolecular polymers ( B DESP b s) based on cyclodextrins were prepared by simply heating the mixtures of cyclodextrins and natural acids" should be amended to read "Deep eutectic supramolecular polymers ( B DESP b s) based on cyclodextrins were prepared by simply heating the aqueous solutions of cyclodextrins and acids. Materials science, polymers, self-assembly, supramolecular chemistry, deep eutectic solvents. [Extracted from the article]