Inorganic Chemistry Frontiers
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2021
·Vol. 9
·期 1
·165-178
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IF 6.569
Ning Yang,Linjie Lu,Linhua Zhu,Peiwen Wu,Duanjian Tao,Xiaowei Li,Jiahong Gong,Linlin Chen,Yanhong Chao,Wenshuai Zhu
Porous ionic liquids (PILs), with permanent porosity and fluidity, have been drawing great attention in theoretical research and application. Herein, a novel PIL (HPMo@ZIF-8-PIL) was fabricated by dispersing a phosphomolybdic acid-modified zeolitic imidazolate framework-8 (ZIF-8) into an ionic liquid for deep reactive extraction desulfurization. Size calculation results show that 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonylimide) ([Emim][NTf2]) with larger ion sizes cannot occupy pores of ZIF-8. In detail, the structure along with permanent porosity was well characterized by gas absorption and molecule displacement experiments, and it was found that HPMo@ZIF-8-PIL can not only promote the dispersion of the catalytically active sites but also retain the good liquidity and excellent extraction ability of ionic liquids. At room temperature, 100% removal of dibenzothiophene sulfur in a model oil could be achieved within 2 h using HPMo@ZIF-8-PIL and hydrogen peroxide as the catalyst and oxidant, respectively. Besides, the successful preservation of porosity increases the probability of contact between the oxidant and active sites, which is also in favor of the promotion of desulfurization performance. This work offers a new method for the modification of porous frameworks to construct PIL catalysts, which will provide a new insight into the application of PILs.
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NEW JOURNAL OF CHEMISTRY
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2018
·Vol. 42
·期 14
·11539-11547
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IF 3.201
Jing Gao,Shun Yao,Yu Wang,Zhengbo Hou,Chang Yang,Hang Song
Trichosanthin (TCS) is a kind of basic protein separated from Trichosanthes kirilowii Maxim, which is a good food source for human nutrients and has important uses for health. In this study, a series of imidazole-based ionic liquids (ILs) were chosen as catalysts for TCS hydrolysis in both heating and microwave-assisted modes and the hydrolysis was compared with chlorhydric acid and sulfuric acid together with sodium hydroxide for the degree of hydrolysis (DH) of TCS. It was found that the performance of acidic ILs > neutral ILs > basic ILs; [Hmim][HSO4] among the ILs presented the highest DH which was even better than those of inorganic strong acids. Furthermore, the process of hydrolysis was optimized with 3D-response surface methodology (RSM), and the highest degree of hydrolysis could reach to 48.3% (in heating mode) and 93.9% (in microwave-assisted mode). Finally, D001Na type cation-exchange resins were used in the selective adsorption of amino acid products and ILs in an effluent that could be reused. The hydrolysates from TCS showed an enhanced antioxidant activity which was evaluated in three ways. This study could provide a useful foundation for further research and exploitation of TCS.
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ACS Sustainable Chemistry & Engineering
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2017
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IF 5.951
Xianxian Liu,Cai Ji,Qiwei Yang,Zongbi Bao,Xiaohui Fan,Yiwen Yang,Huabin Xing
Ionic liquids (ILs) have attracted a great deal of attention as solvents in drug-related processes because of their unique physicochemical properties. However, investigations on the cytotoxicity of ILs toward mammalian cell lines are quite insufficient, and it remains a great challenge to develop ILs with both higher efficiency and less cytotoxicity. Herein we reported the cytotoxicity of cholinium carboxylate ILs toward HepG2 cells and their separation performance for natural bioactive molecules for the first time. At first, the cytotoxicity toward HepG2 cells of these ILs was systematically evaluated by MTT cell viability assays, and then their functionality as extractants was investigated through the extractive separation experiments of tocopherol homologues. The results demonstrated that these ILs combined both lower cytotoxicity and higher performance than the widely used imidazolium chloride ILs. For example, the IC50 of cholinium acetate was 135.53, approximately 4 times as large as that of 1-ethyl-3-methylimidazolium chloride (35.66). The distribution coefficient of δ-tocopherol and the selectivity of δ-tocopherol to α-tocopherol using cholinium octanoate were 8.24 and 9.84, respectively, which were 37 times and twice those using 1-ethyl-3-methylimidazolium chloride. These results manifest that ILs can be designed in a win–win strategy to combine low cytotoxicity and high performance, which are highly instructive to improve the application of ILs in drug-related processes owing to the positive impact on both safety and efficiency.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Fei Liu,Xuewu Wang,Xiaqing Li,Xiaodong Dai,Zhaoxiang Zhang,Daoxu Wang,Ye Wang,Shunyao Jiang
Well wall collapse due to massive fluid in water-based drilling fluids (WDFs) intrusion into the reservoir is an urgent issue during oil drilling. In this study, we synthesized the poly(ionic liquids) (PILs) based on β-cyclodextrin and investigated its novel application as fluid loss additive in WDFs. American Petroleum Institute standard filtration tests showed that the PILs exhibited excellent filtration control performance even after hot rolling at 180 °C for 16 h compared to commercial fluid loss additives (Driscal D, PAC-Lv, CMC). Specifically, the fluid loss volumes of Driscal D/WDFs, PAC-Lv/WDFs and CMC/WDFs were 10.4 mL, 12.4 mL and 14.8 mL respectively after hot roll at 180 °C for 16 h, however, the fluid loss of PILs/WDFs was only 2.8 mL. The extremely low filtration rate, thickness and permeability of the PILs/WDFs mud cake resulted in exceptionally low fluid loss volume. Additionally, the mechanism of PILs controlling fluid loss in WDFs was revealed by bentonite particle size measurement and Zeta potential measurement. This work demonstrates that PILs have the promising application as an efficient fluid loss additive in WDFs due to the outstanding filtration loss reduction behavior.
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Green Chemical Engineering
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2025
·
IF 7.6
Wei Hui,Xin Wang,Xiao-Ya Wang,Fei-Feng Mao,Tiao Zhang,Yan Zhou,Jia-Yin Zhang,Duan-Jian Tao
The mass transfer and diffusion limitations of ionic liquids (ILs) have hindered their application in SO 2 separation. In this work, five diethyl sulfate (DiEtSO 4 ) based ionic liquids (DiEtSO 4 -based ILs) with different viscosities ( μ , 3∼285 cP) were synthesized by tuning the cationic structures. The SO 2 absorption capacities and kinetics of DiEtSO 4 -based ILs were evaluated at 298-313 K. Meanwhile, liquid-side volumetric mass transfer coefficients ( k L a ) and liquid-side mass transfer coefficients ( k L ) were determined using the pressure drop method to assess SO 2 mass transfer in DiEtSO 4 -based ILs quantitatively. The results indicated a physical absorption mechanism for SO 2 , consistent with Henry's law (Δ H < ∼21 kJ/mol). Specifically, both 1-methylimidazole diethyl sulfate ([MIM][DiEtSO 4 ]) and 1,8-diazabicyclo[5.4.0]undec-7-ene diethyl sulfate ([DBU][DiEtSO 4 ] demonstrated high capacities (∼9.6 mmol/g), rapid kinetics (equilibrium within < 2.5 min), and excellent cyclic stability with minimal capacity loss (∼0.1%). Moreover, density functional theory (DFT), conductor-like screening model for real solvent thermodynamics (COSMOtherm), and independent gradient model (IGM) analyses confirmed that Van der Waals and weak electrostatic interactions predominate over chemical bonding in the absorption process. Mass transfer analysis confirmed an inverse relationship between μ and k L ( k L ∝ μ −0.5 ) in DiEtSO 4 -based ILs, which is consistent with Danckwerts' theory. Based on its superior overall performance in SO 2 absorption capacity, mass transfer rate, and cyclic stability, [MIM][DiEtSO 4 ] emerged as the most promising candidate for SO 2 separation and recovery.
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CATALYSIS COMMUNICATIONS
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2014
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IF 3.32
Man Wang,Xiaobin Yuan,Hongyu Li,Limin Ren,Zhizhong Sun,Yanjun Hou,Wenyi Chu
An efficient strategy for the nickel-catalysed synthesis of biaryls and terphenyls has been developed in environmentally-friendly reaction media. In the presence of β-diketone and PPh 3 ligands, Ni(TFA) 2 acted as an effective catalyst for the Suzuki–Miyaura cross-coupling of aryl halides and arylboronic acids in an ionic liquid solution. Biaryls and terphenyls were obtained in good yields under this catalytic system.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Jiuli Han,Lu Bai,Haiyan Jiang,Shaojuan Zeng,Bingbing Yang,Yinge Bai,Xiangping Zhang
Ionic liquids (ILs) have become attractive in membranes for CO2 separation because of the designable structure, high CO2 affinity, and good compatibility and stability. Modification of metal–organic frameworks with ILs is an effective strategy to improve the gas separation performance of mixed matrix membranes (MMMs). In this work, task-specific ionic liquids (TSILs) were incorporated to prepare TSIL@ZIF-67/PIM-1 MMMs and improve CO2 separation performance because of the high CO2 solubility and great compatibility toward ZIF-67 and PIM-1. The TSILs (TMGHIM and TMGHPhO) selectively and reversibly interact with CO2 and improve the interfacial compatibility between ZIF-67 and PIM-1, leading to higher CO2/CH4 and CO2/N2 selectivities than that of the ZIF-67/PIM-1 MMM and the directly blended membrane (TSIL/ZIF-67/PIM-1). The 10 wt % TMGHIM@ZIF-67/PIM-1 MMM shows enhanced CO2/N2 and CO2/CH4 selectivities of 13.7 and 10.5, respectively; meanwhile, the CO2 permeability reaches 12,848.5 Barrer and is 2.5 times that of the pure PIM-1 membrane. The TSIL@ZIF-67/PIM-1 MMMs also show good stability against physical aging.
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SOLID STATE IONICS
·
2018
·
IF 2.751
Dapeng Shang,Jifang Fu,Qi Lu,Liya Chen,Jintao Yin,Xing Dong,Yufeng Xu,Rongrong Jia,Shuai Yuan,Yi Chen,Wei Deng
A series of novel imidazolium-based polyhedral oligomeric silsesquioxane ionic liquids (POSS-ILs) have been successfully synthesized and used to develop new solid polymer electrolytes with high ionic conductivity and wide electrochemical windows. The POSS-ILs are added to the solid polymer electrolytes (SPEs) based on blend of polyethylene oxide (PEO), poly(vinylidene fluoride-hexafluoro propylene) (P(VDF-HFP)), propylene carbonate (PC) and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) to alter the morphology, ionic conductivity , electrochemical windows properties. The results from scanning electron microscope (SEM), energy-dispersive x-ray spectrometry (EDXS) mapping and X-ray diffraction (XRD) indicate that POSS-ILs are uniformly distributed in the SPEs and form amorphous area by significantly inhibiting the crystallization of host polymer. The electrochemical studies indicate that the addition of POSS-ILs increases the ionic conductivity up to 3.9 × 10 −4 S cm −1 at 22 °C and 1.5 × 10 −3 S cm −1 at 62 °C. The electrochemical windows of POSS-ILs based SPEs are stable up to 5.0 V. As a result, the lithium-ion battery cell prepared using the POSS-ILs-SPE showed a good cycle performance and reversible capacity recovery behavior. These indicate POSS-ILs based SPEs would be good candidate to replace the conventional organic liquid electrolytes for lithium ion batteries.
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Journal of CO2 Utilization
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2016
·
IF 4.764
Xian-Dong Lang,Yi-Chen Yu,Zheng-Ming Li,Liang-Nian He
Despite recent renaissance of CO 2 chemistry, transformation of CO 2 at ambient conditions remains still of great challenge. In this work, an easily prepared protic ionic liquid e.g. 1,1,3,3-tetramethylguanidinium imidazolide [HTMG][Im] was developed as highly efficient, recyclable and bifunctional catalyst for the carboxylative cyclization of 2-aminobenzonitriles with CO 2 at atmospheric pressure and room temperature. The catalytic protocol was found to be applicable to various 2-aminobenzonitriles bearing electron-withdrawing or electron-donating substituents, affording the corresponding quinazoline-2,4(1H,3H)-diones in moderate to excellent yields. In addition, the catalyst could be conveniently recovered and reused for five cycles with almost consistent activity. Consequently, this process represents an alternative approach for the efficient and greener chemical fixation of CO 2 to afford valuable heterocycles.
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Materials Today Chemistry
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2025
·
IF 6.7
Dawei Zhen,Yirong Qiao,Fengmao Liu,Xiaohui Liu,Shouhe Pan,Qingrong Peng
This work investigated the interaction between micelles of surface-active ionic liquids (SAILs) and the peptide drug HPV16E7 49-57 . Nine SAILs were designed, including 1-octyl-3-methyl imidazolium with glycinate ([C 8 mim][Gly]), lysinate ([C 8 mim][Lys]), aspartate ([C 8 mim][Asp]), leucinate ([C 8 mim][Leu]), or phenylalaninate [C 8 mim][Phe]; 1-ethyl-3-methyl imidazolium with oleate (C 2 mim][Ole]) or myristate ([C 2 mim][Myr]); and cholinium with oleate ([Cho][Ole]) or myristate ([Cho][Myr]). The CMC and micellar sizes of SAILs were compared for variation of SAIL constituents. UV–Vis spectroscopy, fluorescence spectroscopy, and solubility determination by HPLC found that the amino acid-based SAIL micelles had higher interaction abilities with the peptide drug than the fatty acid-based SAIL micelles. Their interaction abilities followed the order of [C 8 mim][Phe] > [C 8 mim][Asp] ≈ [C 8 mim][Leu] > [C 8 mim][Gly] > [C 8 mim][Lys] and [C 2 mim][Myr] > [Cho][Myr] ＞[C 2 mim][Ole] > [Cho][Ole], respectively. 1 H NMR analysis revealed that dissimilar solubilization patterns of the peptide in SAIL micelles and the varied interaction forces between SAIL hydrophilic heads and the peptide functional groups caused the different interaction abilities. [C 8 mim][Phe] micelles exhibited the strongest interaction ability due to the solubilization pattern between SAIL monomers and presence of phenyl group at the SAIL hydrophilic head. Furthermore, circular dichroism measurement showed conformational alteration of the peptide by the SAILs. This work lays a foundation for delivery of peptide drugs using SAILs.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
·
IF 2
Kun Yue,Jiani Lu,Peiyu Chen,Shaonan Gu,Guowei Zhou
Vapor–liquid equilibrium (VLE) data for the ternary system of acetonitrile + ethanol + ionic liquids (ILs) were obtained at 101.3 kPa, and used ILs were 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][NTf2]), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][NTf2]), and 1-butyl-3-methylimidazolium diethylphosphate ([BMIM][DEP]). The nonrandom two-liquid (NRTL) model was used to correlate the VLE data and fitted well, indicating that the minimum mole fractions of [BMIM][NTf2], [EMIM][NTf2], and [BMIM][DEP] to eliminate the azeotrope was 0.053, 0.063, and 0.065, respectively. These ILs led to an outstanding “salting-in” effect on ethanol, and the salting effect on acetonitrile was inapparent. Higher concentrations of ILs signified a stronger salt effect as well as higher equilibrium temperatures. The results indicated that [BMIM][NTf2], [EMIM][NTf2], and [BMIM][DEP] could be used as good candidate entrainers to separate acetonitrile and ethanol in extractive distillation.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wanting Zhang,Jiawei Ruan,Xinzi Wu,Qian Liu,Kunchi Xie,Lifang Chen,Zhiwen Qi
The transformation of captured CO 2 into highly-valued dimethyl carbonate (DMC) is a promising approach for CO 2 capture and utilization. However, the direct synthesis of DMC from CO 2 and methanol is limited by high activation barrier derived from inert CO 2 and thermodynamic equilibrium constraints. Herein, three 1-butyl-1-methylpyrrolidinium (BMP)-based ionic liquid (ILs) with polar pyrrole, pyrazole, and 1,2,4-triazole (Tz) azole anions were designed to integrate CO 2 absorption and transformation into DMC. [BMP][Tz] exhibits a relatively high CO 2 uptake capacity of 0.6 mol·mol IL −1 and DMC yield reaches 12.2 % under mild reaction conditions of atmospheric temperature and pressure in 12 h. The reaction equilibrium thermodynamic model reveals that the process involves a combination of 1:1 and 2:1 stoichiometric reaction between [BMP][Tz] and CO 2 . Density functional theory calculations verify that [BMP][Tz] with increased absorption efficiency of azole anions promotes critical bond activation (particular C − O and O − H bonds), thereby enhancing catalytic efficiency. Besides, the reaction mechanism is clarified by the calculation of intermediates and transition state, wherein [BMP][Tz] can efficiently decrease the energy barrier of the rate-controlled step, which involves the insertion of CH 3 O − into CH 3 OCOO − species. Furthermore, polarity-induced phase separation of DMC from the IL phase to solvent phase favors DMC generation by breaking through the reaction equilibrium. The integration of CO 2 absorption-reaction-extraction based on basic and polar ILs, provides a promising approach for CO 2 capture and utilization.
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