Eutectic Molecular Liquids Based on Hydrogen Bonding and π–π Interaction for Exfoliating Two‐dimensional Materials and Recycling Polymers

Yu, Dongkun; Mou, Hongyu; Zhao, Xinhui; Wang, Yaqing; Mu, Tiancheng

doi:10.1002/asia.201900990

Cited by 40 publications

(16 citation statements)

References 31 publications

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“…Therefore, it is necessary to propose a new type of DES. Moreover, the inverted DESs proposed in this work are not eutectic molecular liquids, because they are each composed of an ionic compound and a molecular compound, while the an eutectic molecular liquid is composed of two molecular compounds …”

Section: Figurementioning

confidence: 99%

“…Moreover,t he inverted DESs proposed in this work are not eutectic molecular liquids,b ecause they are each composed of an ionic compound and am olecular compound,w hile the an eutectic molecular liquid is composed of two molecular compounds. [11] 18-crown-6 ether is the most commonc rown ether,a nd the asymmetry of hostm olecules on melting point of DESs were also studied in this work. In addition, the molecular symmetry of benzo-15-crown-5 and benzo-18-crown-6 is similar,b ut the size of the main ring is different.…”

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confidence: 99%

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“Inverted” Deep Eutectic Solvents Based on Host‐Guest Interactions

Mou

et al. 2019

Chemistry An Asian Journal

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Herein, the concept of “inverted” (the mode “molecules mainly interact with cations”) deep eutectic solvents (DESs) is proposed. A strategy to form inverted DESs by host‐guest interactions was developed, and thus numerous DESs could be designed and formed by a combination of host and guest molecules. These liquids are expected to be used as nonaqueous electrolytes in potassium‐ion batteries or other fields for further exploration.

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Section: Figurementioning

confidence: 99%

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confidence: 99%

“Inverted” Deep Eutectic Solvents Based on Host‐Guest Interactions

Mou

et al. 2019

Chemistry An Asian Journal

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“…DESs with high purity can be easily prepared by mixing hydrogen bond donors (HBDs) and hydrogen bond acceptors (HBAs), which may contain two or more constituents, and does not require further purification, therefore simplifying the processes. The interactions between the constituents can be hydrogen bonds, halogen bonds, or Pi-Pi interactions that cause the melting point of synthesized DES to be significantly reduced and lower than any of the individual component [20][21][22]. Abbott et al [23] reported the first example of DES through mixing choline chloride (ChCl) with urea (UE), and then Zhu et al [24] reported that ChCl:UE DES can effectively catalyze the reactions of CO 2 and epoxides.…”

Section: Introductionmentioning

confidence: 99%

Capture of Acidic Gases from Flue Gas by Deep Eutectic Solvents

et al. 2021

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Up to now, many kinds of deep eutectic solvents (DESs) were investigated for the capture of acidic gases from flue gases. In this review, non-functionalized and functionalized DESs, including binary and ternary DESs, for SO2, CO2 and NO capture, are summarized based on the mechanism of absorption, physical interaction or chemical reaction. New strategies for improving the absorption capacity are introduced in this review. For example, a third component can be introduced to form a ternary DES to suppress the increase in viscosity and improve the CO2 absorption capacity. DESs, synthesized with halogen salt hydrogen bond acceptors (HBAs) and functionalized hydrogen bond donors (HBDs), can be used for the absorption of SO2 and NO with high absorption capacities and low viscosities after absorption, due to physicochemical interaction between gases and DESs. Emphasis is given to introducing the absorption capacities of acidic gases in these DESs, the mechanism of the absorption, and the ways to enhance the absorption capacity.

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“…In literature, hydrogen bonding interaction between the DES components was considered usually responsible to form a DES. However, Yu and co‐workers proposed that π‐ π bonding, host–guest interaction, and halogen bonding are other possible mode of interactions between the DES components (Yu et al, 2019; Yu et al, 2019; Yu & Mu, 2019). Therefore, depending on the mode of interaction, the DES components can also be named as electron donor and electron acceptor in addition to HBA and HBD.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a novel environmentally friendly hydrophobic deep eutectic solvent ChCl‐THY and its application in removal of hexavalent chromium from aqueous solution

Rajput

Konwar

Sarma

2021

Water Environment Research

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A liquid–liquid extraction methodology was developed for the removal of Cr(VI) from contaminated water using a novel green hydrophobic deep eutectic solvent (DES) as an efficient sole extracting agent. The hydrophobic DES was obtained by mixing choline chloride and thymol in 1:4 molar ratio at 70°C for 10 min and was denoted as ChCl‐THY(1:4). The ChCl‐THY(1:4) works efficiently for removal of high (20 mg/L) and low (500 µg/L) concentration of Cr(VI) from artificially contaminated natural water with >95% extraction efficiency (E%) at optimized reaction conditions (pH 2–6, 40°C). The DES was characterized by 1H NMR and FTIR spectroscopy, and the data suggest that interaction occurs between Cl− ion of choline chloride and H atoms of thymol molecules. Physicochemical properties such as density, melting point, moisture, and solubility were studied and discussed. Herein, no sharp melting point was observed for ChCl‐THY(1:4) in DSC curve. DES was regenerated using 0.1 M NaOH as stripping agent, and 50%–60% extraction efficiency could be attained in the next cycle. A plausible mechanism of interaction between Cr(VI) species and DES was also explored with the help of FTIR spectroscopy. Practitioner Points A novel hydrophobic DES (ChCl‐THY) is prepared by mixing choline chloride and thymol at 1:4 molar ratio. ChCl‐THY(1:4) is employed for the first time as sole extracting agent to remove the Cr(VI) from contaminated aqueous solution. >95% extraction efficiency was achieved by ChCl‐THY(1:4) in natural water conditions at µg/L and mg/L level of contamination. Both the component used to prepare the DES are naturally abundant; hence, DES is not toxic for biota. The element present in natural water did not show any interference with extraction of Cr(VI).

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Eutectic Molecular Liquids Based on Hydrogen Bonding and π–π Interaction for Exfoliating Two‐dimensional Materials and Recycling Polymers

Cited by 40 publications

References 31 publications

“Inverted” Deep Eutectic Solvents Based on Host‐Guest Interactions

“Inverted” Deep Eutectic Solvents Based on Host‐Guest Interactions

Capture of Acidic Gases from Flue Gas by Deep Eutectic Solvents

Preparation of a novel environmentally friendly hydrophobic deep eutectic solvent ChCl‐THY and its application in removal of hexavalent chromium from aqueous solution

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