TALANTA
·
2024
·
IF 5.6
Tai Wen,Junyao Li,Wenrong Cai,Datong Wu,Zheng-Zhi Yin,Yong Kong
Efficient discrimination of amino acids (AAs) isomers is of significant importance for life science and analytical chemistry. Here, a dual-mode chiral discrimination strategy is proposed for visual and electrochemical chiral discrimination of tryptophan (Trp) isomers. Shikimic acid chiral ionic liquids (SCIL) is coordinated with copper ions (Cu 2+ ), and the obtained SCIL-Cu 2+ can form ternary complexes with the Trp isomers. Owing to the inherent chirality of SCIL and the reverse homochirality of L-Trp and D-Trp, the ternary complex of SCIL-Cu-D-Trp has higher stability than SCIL-Cu-L-Trp, as revealed by the calculated stability constants ( K ) and changes in Gibbs free energy (Δ G ). The difference in the stability can be utilized for the chiral discrimination of L-Trp and D-Trp, resulting in discernible differences in colors and the electrochemical signals of the Trp isomers. Besides Trp, the isomers of phenylalanine (Phe) can also be discriminated by the proposed dual-mode chiral discrimination strategy with the SCIL-Cu 2+ complex.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhaowei Zhang,Weiqi Mao,Lili Jiang,Kaili Wang,Haoran Li,Qiaoxin Xiao,Congmin Wang
As we know, ionic liquids (ILs) used for efficient carbon capture primarily depend on anions with strong basicity to form robust chemical interactions with CO 2 . However, these ILs often suffer from high regeneration consumption and low stability. Herein, for anion-functionalized ILs with weak basicity but high thermostability and low regeneration energy, we establish an intermolecular proton transfer reaction by introducing proton donors and thus a ternary synergistic system of “anion with weak basicity-proton donor-CO 2 ″ was created to activate and enhance the CO 2 binding efficiency. Delightfully, the introduction of these proton donors leads to a substantial increase in CO 2 absorption capacity, particularly in the presence of water, the absorption capacity of wet ILs is three to six times higher than that of dry ILs. The good stability of these systems is verified by continuous absorption and desorption cycle experiment. Through a combination of spectroscopic analysis and the DFT method, including noncovalent interaction (NCI) and reduced density gradient(RDG) analysis, we elucidate the chemical mechanism of CO 2 absorption by the IL-proton donor system. In the presence of proton donors, intermolecular proton transfer reactions occur between anions and proton donors, which activate nucleophilic oxygen sites on the donors to bind with CO 2 . This process drives the formation of thermodynamically favorable bicarbonate or carbonate species, thereby significantly enhancing CO 2 absorption capacity. The strategy offers novel perspectives for applying anion-functionalized ILs with weak basicity in CO 2 capture.
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Zhaozhao Yang,Pengyang Li,Guoqing Chen,Bofeng Fu,Yongheng Dong,Xingang Yang
Ionic liquids (ILs), as novel electric-controlled lubricants, can regulate their tribological behavior under electrified sliding. This study systematically investigates the tribological properties and interface adsorption dynamics of ILs with different chain lengths under electric field control, combining macroscopic experiments and molecular dynamics simulations. Compared to the base lubricant, longer-chain ILs form more stable tribofilms at the electrified interface, reducing the friction coefficient and wear volume by 33.13 % and 79.61 %, respectively. The −COO – group plays a dominant role in tribofilm formation and alters the dynamic migration of ILs. The applied electric field weakens the hydrogen bonding between ILs and the base lubricant, promotes ILs accumulation at the electrified interface, and effectively reduces shear stress.
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高影响因子
Thermal Science and Engineering Progress
·
2025
·
IF 5.4
Yanlong Lv,Yuhao Wang,Yutong Gong,Feng Liu,Yunze Hao,Jiyuan Zhou,Jun Sui
To explore the application performance of 1-Ethyl-3-methylimidazolium based ionic liquids in absorption heat transformers, this study measured the saturated vapor pressure of 1-Ethyl-3-methylimidazolium chloride and 1-Ethyl-3-methylimidazolium methanesulfonate solutions at different concentrations and the specific heat capacity of their pure substances at 25–200 °C. Using the Non-Random Two-Liquid activity coefficient model and enthalpy calculation equations, the measured data were correlated with an absorption heat transformer model. A sensitivity analysis was conducted focusing on condensation temperature, evaporation/generation temperature, and absorption temperature, with a comparison to the traditional LiBr + H 2 O working pair. Results indicated that the LiBr + H 2 O working pair performs well under conventional temperature conditions. However, the ionic liquid working pairs demonstrate a broader viable temperature range, showing stable performance when the condensation temperature is below 81 °C, the evaporation/generation temperature exceeds 108 °C, and the absorption temperature is below 197 °C. Furthermore, comparing the optimal coefficient of performance and exergy performance coefficient data with their corresponding absorption temperatures revealed that 1-Ethyl-3-methylimidazolium methanesulfonate + H 2 O working pair exhibits the best performance when the absorption temperature exceeds 195 °C, with the ability to maintain coefficient of performance and exergy coefficient of performance values of 0.21 and 0.37, respectively, even at an absorption temperature of 240 °C. This study accurately measured the thermophysical properties of the 1-Ethyl-3-methylimidazolium based ionic liquid + H 2 O working pairs under high-temperature conditions, providing crucial insights into their application in absorption heat transformers. It outlines their benefits and limitations compared to traditional working pairs, thus paving the way for future research.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Yue Wang,Wenxiu Li,Tao Zhang
The separation of 2-methylfuran (2-MF) and methanol (MeOH) azeotropes presents a critical challenge in biofuel production due to the efficiency and sustainability limitations of conventional methods. In this study, three ionic liquids (ILs)—1-ethyl-3-methylimidazolium hydrogen sulfate ([EMIM][HSO 4 ]), 1-ethyl-3-methylimidazolium thiocyanate ([EMIM][SCN]), and 1-ethyl-3-methylimidazolium dicyanamide ([EMIM][DCA])—were selected as green extractants for 2-MF – MeOH azeotropic separation. Ternary liquid-liquid equilibrium (LLE) data for the system 2-MF (1) + MeOH (2) + IL (3) were experimentally determined at 303.15 K and 101.325 kPa. The order of both distribution coefficient and selectivity is [EMIM][HSO 4 ] > [EMIM][SCN] > [EMIM][DCA]. Then, the NRTL model was subsequently employed to regress the experimental data, and the accuracy of the NRTL binary parameters was verified through the “GMcal_TieLinesLL” tool. Further mechanistic investigation integrated theoretical approaches (ESP, IGMH, RDF, and MSD analysis) with experimental validation via FT-IR spectroscopy. This combined methodology conclusively elucidates the pivotal role of hydrogen bonding in the extraction and separation process.
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高影响因子
ACS Omega
·
2025
·
IF 4.3
Zixi Wu,Chunxiang Huang,Leyi Li,Jinxiang Cao,Yingjie Liu,Qing Ye,Jinlong Li
The paper presents experimentally determined solubility results of lithium bromide in ionic liquid + water and assesses the effect of the addition of ionic liquids (ILs) on the solubility of lithium bromide (LiBr) in water. The solubility of LiBr in pure water has been determined and compared to the literature data. It is known that LiBr aqueous solutions are widely used as working fluids in low-temperature thermal energy recovery systems. However, the aqueous LiBr solution is easy to crystallize, which could cause equipment corrosion. One of the possibilities for improving the properties of the H2O/LiBr refrigerant system is the use of an additive to increase the solubility of LiBr in water. Three ILs were selected as an additive: 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]), 1-ethyl-3-methylimidazolium bromide ([EMIM]Br), and 1-butyl-3-methylimidazolium bromide ([BMIM]Br). In this study, new empirical parameters for the calculation of LiBr solubility in water were provided. A reasonable prediction of phase equilibrium data is made using the COSMO-SAC model. The NRTL equation is also calculated. The maximum deviation of COSMO-SAC is 7.56%, and the deviation of the other calculations is less than 2%. These experimental and theoretical findings offer valuable insights into the selection and optimization of working fluids in absorption cycle systems.
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高影响因子
MOLECULES
·
2022
·Vol. 27
·期 16
·5284
·
IF 4.927
Peipei Yang,Mengya Lu,Jing Zhao,Emelda Rosseleena Rohani,Rongchun Han,Nianjun Yu
By applying the hydrophilic ionic liquid, 1-butyl-3-methylimidazolium chloride ([C4mim]Cl), and inorganic salts (K3PO4), an ionic liquid aqueous two-phase system (ILATPS) was established for the separation ofDendrobium huoshanensepolysaccharides (DhPs) and proteins. The effects of inorganic salt concentration, IL quantity, crude DhPs concentration, pH value and temperature were studied to achieve the optimal condition. With the best combination of ILATPS (1.75 g K3PO4, 1.25 g [C4mim]Cl, 10 mg crude DhPs and 5.0 mL ddH2O at pH 7.0 under 25 °C), the extraction efficiency rates for DhPs and proteins were 93.4% and 90.2%, respectively. The processed DhPs retrieved from the lower salt-rich phase comprised mannose, glucose, galactose, arabinose, and galacturonic acid with a molar ratio of 185:71:1.5:1:1 and the molecular weight was 2.14 × 105Da. This approach is fast, simple and environmentally friendly. It provides a new insight into purifying functional polysaccharides of plant origin.Keywords:Dendrobium huoshanense;ionic liquid;polysaccharides;aqueous two-phase system
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高影响因子
Biomaterials Science
·
2021
·Vol. 10
·期 4
·1041-1052
·
IF 6.843
Yi-Ru Gao,Wen-Xin Zhang,Ya-Nan Wei,You Li,Teng Fei,Yang Shu,Jian-Hua Wang
Antibacterial hydrogel dressings play an important role in wound healing and infection treatment. The majority of hydrogels are obtained through chemical cross-linking and complex synthesis or processing. Copper ions (Cu2+) have been involved in sterilization; however, their direct use may lead to high local concentrations and heavy metal toxic side effects. Herein, dopamine (DA) was polymerized in situ along a polyvinyl alcohol (PVA) chain and chelated copper ions (Cu2+) to form a mixture. Ionic liquid (IL) choline–glycolate (CGLY) was added to the mixture to form an ionic gel. CGLY promotes gel formation through intermolecular hydrogen bonds with the polymer chains and avoids the use of toxic chemical crosslinking agents. Meanwhile, CGLY can also promote the release of Cu2+ and generate hydrogel free radicals (˙OH) in the wound through chemodynamic therapy to kill drug-resistant bacteria. In addition, the excellent transdermal property of CGLY enables the released Cu2+ to stimulate cell migration and accelerate wound healing. The gel exhibits favorable biocompatibility and its use has been demonstrated in skin infection therapy of mice.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Juantao Zhang,Minjian Kong,Jiangtao Feng,Chengxian Yin,Danping Li,Lei Fan,Qibin Chen,Honglai Liu
A new type of the dimeric imidazolium-type amphiphile, BDBC m IB (m = 1, 4 and 8), was synthesized using the bipyridiyl as the spacer, and its inhibition performance and mechanism for the corrosion of N80 carbon steel in 1.0 mol·L −1 HCl were evaluated using chemical and electrochemical measurements, surface analyses and density functional theory (DFT) calculations. Results show that the inhibition efficiency of BDBC m IBs increases with their concentrations and the length of tail chains. BDBC 8 IB exhibits the best inhibition performance among them and its inhibition efficiency almost exceeds 90% in a wide concentration range from 1.0 × 10 −6 to 5.0 × 10 −4 mol·L −1 mol·L −1 at 25.0 °C, which attains the maximum over 95% at 5.0 × 10 −4 mol·L −1 . Moreover, three BDBC m IBs all display the high inhibition efficiency at 5.0 × 10 −4 mol·L −1 , nearly exceeding 90%, in the temperature range from 25.0 to 55.0 °C. As a mixed-type inhibitor, BDBC m IBs can retard both cathodic hydrogen evolution and anodic metal dissolution processes, since BDBC m IB molecules bear the imidazolium-based heterocycle with the electron-donating ability and the bipyridine with the electron-accepting ability, thereby facilitating the formation of a protective film on the surface of N80 carbon steel via electrostatic interactions, coordinated and back-donating bonds. The adsorption of BDBC m IBs obeys the Langmuir isothermal model. Our finding demonstrates that the introduction of the bipyridiyl at the spacer does favor improving the inhibition efficiency of such dimeric imidazolium-type amphiphiles, and meanwhile, the proper increase in the number of carbon atoms in the substituents on the imidazole rings can also enhance the inhibition efficiency.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhennan Wang,Weizhong Zheng,Bihong Li,Weizhen Sun,Ling Zhao,Weikang Yuan
To solve the serious safety issues such as highly flammable organic electrolyte, this work developed a novel lithium metal battery containing quasi-solid-state electrolyte (QSSE) with ionic liquid (ILs)/Li salt as electrolyte and covalent organic frameworks (COFs) as hosts. The micro-scale structure and dynamics properties of several ILs confined in COFs were investigated in detail using molecular dynamics (MD) simulations. It is found that the distinctly alternate layering structure of cations and anions of ILs from the pore surface to pore center are formed inside COFs due to the strong interaction between cations/anions and pore wall of COFs. The orientational preferences of confined ILs are observed depending on the size of anions. Inside the larger pores of COFs, the bulk-like structure of confined ILs is found, which tends to enlarge the leakage risk of electrolytes, while the smaller pore size of COFs can reduce the diffusion of ILs and further limit the ionic conductivity of electrolytes. The prepared QSSE with the appropriate-size ILs confined in medium pore-size COFs shows a higher ionic conductivity (0.87 mS cm −1 at 30 °C), more efficient inhibition of lithium dendrite (above 2000 h stability) and better battery performance (150.4 mAh g −1 at 0.1C). These findings from both simulations and experiments confirm the potential of COFs for achieving nondendritic lithium growth in lithium metal batteries.
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高影响因子
MACROMOLECULES
·
2020
·
IF 5.918
Xi He,Miqiu Kong,Yanhua Niu,Guangxian Li
A series of dicationic ionic liquids (DILs) with two singly charged imidazolium rings linked by different alkyl chain lengths (C4, C6, and C8) were first synthesized. The relaxation and entanglement of poly(methyl methacrylate) (PMMA) chains in both the DILs and conventional monocationic ionic liquids (MILs) with the same anion bis[(trifluoromethyl)sulfonyl]imide ([TFSI]−) were investigated by rheological and dynamic light scattering (DLS) measurements. PMMA in DILs exhibits lower critical entanglement concentration, slower relaxation behavior, and a denser entanglement network than in their MIL counterparts, and these differences become more pronounced as the alkyl chain length decreases. The double imidazolium ring structure that provides interaction sites with PMMA chains plays a dominant role in the relaxation and entanglement of the PMMA/DIL system. As a result, the PMMA/DILs show higher modulus, greater viscosity, and better gel recovery than the PMMA/MILs at the same volume fraction. In addition, a stronger dependence on alkyl chain length is also found in PMMA/DILs. With the increase of alkyl chain length, the relaxation of PMMA becomes faster and the entanglement molecular weight increases gradually, indicating the released mobility of polymer chains. Combined with the results of DLS, it is further confirmed that the greater degree of entanglement in PMMA/DILs mainly comes from the contribution of cohesional entanglement in the system.
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高影响因子
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2022
·Vol. 95
·期 1
·143-153
·
IF 0.869
Jing Xiaohua,Sun Zhumei,Ren Jie,Chen Jing,Pan Donghui,Chen Yufei
Abstract Novel task-specific ionic liquids of [C 4 H 9 NH 3 ][P507], [C 6 H 13 NH 3 ][P507], [C 8 H 17 NH 3 ][P507], [C 10 H 21 NH 3 ][P507] and [C 12 H 25 NH 3 ][P507] were synthesized by one-step reaction. The 1 H NMR, 13 C NMR, FT-IR and mass spectra (MS) of the novel task-specific ionic liquids s were studied for analysis of their purities. The [C 4 H 9 NH 3 ][P507] has better performance of selective separation of Co 2+ from Ni 2+ in simulated sulfate solution due to the smaller different value between the radius of Co 2+ and the radius of [C 4 H 9 NH 3 ] + . The separation factor of Co 2+ from Ni 2+ was 522 using the three-stage cross flow extraction. A cleaner separation of Co 2+ from simulated solution containing 14 and 25 g/L of Co 2+ and Ni 2+ , respectively, was achieved using this process due to the unique properties of [C 4 H 9 NH 3 ] [P507].
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高影响因子
危险品化学品经营许可证（带存储）