COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Wenjun Zhang,Tingyan Ye,Shuangjiang Li,Yiyan Liu,Xiliang Li,Juan Li,Yunfei Zhi,Tianding Hu,Donghui Liu,Shaoyun Shan,Yi Liu
Incorporating hydrogen bond donor (HBD) groups into poly(ionic liquids) (PILs) has emerged as an effective strategy to enhance their catalytic performance in the cycloaddition of CO 2 and epoxides. However, developing polymeric catalysts that combine a high density of ionic sites with tunable HBD functionalities remains challenging. Accordingly, this study adopts a synergistic functional design strategy to construct bifunctional PILs catalysts bearing either hydroxyl or carboxyl groups on imidazolium and pyridinium backbones via a facile two-step synthetic route. In the cycloaddition of CO 2 and epoxides, all HBD-functionalized PILs exhibited significantly enhanced catalytic activity. Among them, the carboxyl-functionalized imidazolium-based PIL (PIMIBr-COOH) demonstrated the highest performance, affording a 95 % yield of chloropropylene carbonate (CPC) under relatively mild conditions (90 °C, 4 h, 0.5 MPa CO 2 ). In addition, PIMIBr-COOH exhibited excellent recyclability and broad substrate scope. Density functional theory (DFT) calculations revealed that the HBD groups effectively activate epoxide substrates. In situ FT-IR spectroscopy further revealed the critical nucleophilic role of bromide ions (Br - ) in facilitating the epoxide ring-opening process. Based on these findings, a plausible reaction mechanism was proposed for the PIMIBr-COOH catalyzed cycloaddition of CO 2 and epoxides, involving epoxide activation, nucleophilic ring opening, and cyclic carbonate formation through the synergistic interaction between the carboxyl group and Br - . This work not only elucidates the catalytic mechanism but also provides theoretical guidance for the functional design of ionic polymer catalysts toward efficient and sustainable CO 2 valorization.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SPECTROSCOPY
·
2016
·
IF 1.798
Xing Dong,Yunchang Fan,Peng Yang,Jichuan Kong,Dandan Li,Juan Miao,Shaofeng Hua,Chaobing Hu
The inhibitory effects of nine ionic liquids (ILs) on the catalase activity were investigated using fluorescence, absorption ultraviolet-visible spectroscopy. The interactions of ILs and catalase on the molecular level were studied. The experimental results indicated that ILs could inhibit the catalase activity and their inhibitory abilities depended on their chemical structures. Fluorescence experiments showed that hydrogen bonding played an important role in the interaction process. The inhibitory abilities of ILs on catalase activity could be simply described by their hydrophobicity and hydrogen bonding abilities. Unexpected less inhibitory effects of trifluoromethanesulfonate (TfO−) might be ascribed to its larger size, which makes it difficult to go through the substrate channel of catalase to the active site.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Yongbo Chen,Niangeng Wu,Hao Liu,Huaiwen Fan,Qunsheng Li,Hongkang Zhao
This study examines the vapor–liquid equilibrium (VLE) of the butyl acetate + butanol binary system and the corresponding ternary mixtures containing [EMIM][OAC], [EMIM][Cl], or [BMIM][OAC]. The results show that [EMIM][OAC] and [BMIM][OAC] enhance the separation driving force and effectively eliminate azeotropic behavior. Among the tested ionic liquids, [EMIM][OAC] provides the strongest enhancement. The phase equilibrium data were correlated with the NRTL model, yielding average relative deviations (ARDs) of 4.80% for the binary system and 3.48, 3.65, and 3.57% for the ternary systems. Thermodynamic consistency tests further support the reliability of both the experimental data and the fitted model. Overall, these findings highlight the potential of ionic liquids (particularly [EMIM][OAC]) to improve separation efficiency in azeotropic systems.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2017
·
IF 2.726
Jiao Ren,Zhiyong Li,Jing Liu,Yuanchao Pei,Huiyong Wang,Jianji Wang
Searching for environmentally friendly aqueous two-phase systems is imperative for the sustainable development of separation technologies. In this work, five kinds of environmentally benign choline derivative ionic liquids were synthesized and used for the formation of aqueous two-phase systems with K 3 PO 4 , K 3 C 6 H 5 O 7 or K 2 CO 3 . In order to understand the phase formation processes of these aqueous two-phase systems and their possible application in extraction, phase diagrams and partition coefficients of purine alkaloids were determined at T = 298.2 K, and the effects of structure of the ionic liquids, nature of the purine alkaloids, composition and temperature of the systems on the partitioning behaviour of purine alkaloids were investigated systematically. It was shown that caffeine, theobromine and 2,6-amino purine could be extracted effectively into the ionic liquid-rich phase of the aqueous two-phase systems, and the partition coefficients were as high as 4.5–42 under the optimized conditions. The partitioning was found to decrease with the increase of the ratio of H 2 O weight fraction (in the ionic liquid-rich phase and in the salt-rich phase) and hydrophobicity of both the purine alkaloids and the ionic liquids, but not sensitive to the change of temperature.
研究领域:
分离科学
·
绿色化学
·
离子液体
·
化学工程
·
分析化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Sicheng Su,Wenli Miao,Zejia Zhao,Chaocan Zhang,Lili Wu,Wanyu Chen
Ionogels, combining ionic conductivity with soft mechanical properties, have shown broad prospects in wearable electronics and flexible bioelectronic devices. However, conventional ionogels predominantly rely on imidazolium-based ionic liquids, which suffer from potential biotoxicity, limited degradability, and challenges in achieving multifunctional integration. Herein, a green strategy is proposed to construct high-performance ionogels by developing bio-ionic liquids from natural small biomolecules. Through the cooperative action of multiple noncovalent interactions, l -carnitine and citric acid were combined to form a biocompatible ionic liquid, which was subsequently introduced into a poly(vinyl alcohol)-polyethyleneimine network to fabricate an ionogel via a freeze-thaw-induced physical crosslinking. With the participation of the ionic liquid, the cohesive energy within the gel matrix and the interfacial binding energy are synergistically optimized, enabling the resulting ionogel to simultaneously exhibit high stretchability (elongation exceeding 1000%), strong interfacial adhesion (shear stress up to 1357 kPa on glass substrates), and stable strain-sensing performance (maintaining reliable responses over more than 7000 loading-unloading cycles) without the need for chemical crosslinkers or complex synthetic routes. In addition, the ionogel demonstrates intrinsic antibacterial activity and favorable biocompatibility. The ionogel enables reliable monitoring of human motions and effective discrimination of different massage manipulation modes, highlighting its promising potential for wearable ionic skins and flexible bioelectronic devices. This work provides a new design paradigm for the green and bio-friendly construction of multifunctional ionogels.
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 15
·7299-7304
·
IF 3.3
Xiaoqian Chang,Yuepeng Wang,Yanfei Zhao,Ying Wang,Rongxiang Li,Zhengang Ke,Penglei Chen,Zhimin Liu
1,4-Dioxane and its derivatives are a class of important chemicals, which can be produced via dehydrative cyclization of vicinal diols catalyzed by acid or Lewis acid catalysts, but generally suffer from their inherent shortcomings. Herein, we report a hydrogen-bonding catalyzed approach for the synthesis of 1,4-dioxanes from vicinal diols in ionic liquids under metal-free conditions. The ILs possessing a cation hydrogen-bond donor and an anion hydrogen-bond acceptor (e.g., 1-hydroxyethyl-3-methyl imidazolium trifluoromethanesulfonate, [HO-EtMIm][OTf]) were found to be effective for the reaction. In particular, [HO-EtMIm][OTf] showed the best performance among the tested ILs, even better than H2SO4, affording a series of 1,4-dioxanes in high yields and excellent selectivity under mild conditions (e.g., 120 °C). The mechanism investigation indicates that the IL cation and anion as the hydrogen-bond donor and acceptor, respectively, can activate the C–O and O–H bonds of diols via hydrogen-bonding, which synergistically realizes the dehydrative cyclization of vicinal diols to generate 1,4-dioxanes. In addition, this IL could be reused 5 times without activity loss. This work provides a simple, green route to produce 1,4-dioxanes, which may have promising applications.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2023
·
IF 5.3
Wensheng Wei,Yuxin Wang,Zizhen Yan,Jiaxiang Hou,Guangwen Xu,Lei Shi
Three quaternary ammonium ionic liquids with strong nucleophilicity and distinctive structures were synthesized with high yield and purity based on the 1,2-propylene glycol anion (CH 3 CH 2 OHCH 2 O - ) derived from transesterification products. Dimethyl carbonate (DMC) was in turn produced via a one-step reaction among propylene oxide (PO), CO 2 , and methanol (MeOH) by using the synthesized ionic liquids. The involved two-stage catalytic reaction of PO-CO 2 cycloaddition and PC-MeOH transesterification was implemented without catalyst separation. Under mild conditions, the PO conversion reached 99.0%, with a PC yield of 99.0%, and a TON value of 119.5. Following the cycloaddition, MeOH was immediately introduced to achieve a PC conversion of 71.2%, a selectivity to DMC above 99%, and a TON value of 57.4 for the transesterification reaction. The influences of temperature as well as time for cycloaddition and transesterification were investigated. Cycloaddition of CO 2 with various epoxides was also examined and all showed good performance. By taking advantage of the decomposability of as-prepared ionic liquids and the recyclability of decomposition products, a new catalyst circulation process was designed to complete the full cycle without introduction of any impurities into the product system.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 5
·2312
·
IF 4.6
Xiaokang Wang,Yuanyuan Cui,Yingying Song,Yifan Liu,Junping Zhang,Songsong Chen,Li Dong,Xiangping Zhang
The separation of dimethyl carbonate (DMC) and methanol is of great significance in industry. In this study, ionic liquids (ILs) were employed as extractants for the efficient separation of methanol from DMC. Using the COSMO-RS model, the extraction performance of ILs consisting of 22 anions and 15 cations was calculated, and the results showed that the extraction performance of ILs with hydroxylamine as the cation was much better. The extraction mechanism of these functionalized ILs was analyzed by molecular interaction and the σ-profile method. The results showed that the hydrogen bonding energy dominated the interaction force between the IL and methanol, and the molecular interaction between the IL and DMC was mainly Van der Waals force. The molecular interaction changes with the type of anion and cation, which in turn affects the extraction performance of ILs. Five hydroxyl ammonium ILs were screened and synthesized for extraction experiments to verify the reliability of the COSMO-RS model. The results showed that the order of selectivity of ILs predicted by the COSMO-RS model was consistent with the experimental results, and ethanolamine acetate ([MEA][Ac]) had the best extraction performance. After four regeneration and reuse cycles, the extraction performance of [MEA][Ac] was not notably reduced, and it is expected to have industrial applications in the separation of methanol and DMC.Keywords:COSMO-RS;ionic liquids (ILs);dimethyl carbonate (DMC);methanol;extraction separation
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Wenrui Huang,Xingchen He,Jiacong Wu,Xinnan Ma,Juan Han,Lei Wang,Yun Wang
In this work, the effects of two ionic liquids (ILs), four deep eutectic solvents (DESs) and the individual components of DESs on the stability and structure along with the activity of cellulase were systematically evaluated. The results reported that the cellulase activity was preserved in the ILs/DESs when the temperature was below 60 °C. The addition of 30 % (v/v) DES composed of betaine and ethylene glycol observably promoted the dissolution of microcrystalline cellulose that disrupt the cellulose structure and increases the accessibility of the enzyme. The DESs were considered to be compatible with cellulase because they had no destructive effect on the structure of cellulase in this work. The present study shows the evaluation of the DESs and ILs for improving cellulase properties with the potential to apply in the effective conversion of cellulose to fermentable sugars.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jiuyan Chen,Bingyao Xu,Lulu Lu,Qiang Zhang,Taotao Lu,Usman Farooq,Weifeng Chen,Qian Zhou,Zhichong Qi
The ionic liquids may have an impact on the interactions between fluoroquinolone antibiotics and clay minerals, which are widespread in nature. This work evaluated the adsorption properties of levofloxacin onto three clay minerals (i.e., montmorillonite , vermiculite, and kaolinite) affected by three types of soluble imidazolium-based ionic liquids with different chain lengths of cations ([C 2 mim]Cl, [C 4 mim]Cl, and [C 6 mim]Cl). The results demonstrated that the levofloxacin-binding capacity varied according to clay type (i.e., montmorillonite > vermiculite > kaolinite) regardless of ionic liquids-free or ionic liquids-addition. The observation was made concerning the physical-chemical characteristics of different clay minerals (e.g., physical structure, surface functional groups, specific surface area, and cation exchange capacity). Interestingly, ionic liquids suppressed levofloxacin adsorption on the three test clay minerals because of steric hindrance effects induced by the adsorbed ionic liquids as well as the site competition during co-adsorption of levofloxacin molecules and cations of ionic liquids. Additionally, the inhibitory impacts of ionic liquids in the sequence of [C 6 mim]Cl > [C 4 mim]Cl > [C 2 mim]Cl stemmed from steric hindrance and site competition during co-adsorption of ionic liquids and levofloxacin increased with chain lengths of ionic liquids. Another interesting finding was that the extent of inhibitory effects of [C 4 mim]Cl increased with the rise of pH values from 5.0 to 9.0, owing to the greater adsorption competition and steric effects derived from more adsorbed [C 4 mim] + at higher pH conditions. The findings of this study are critical in assessing the effects of emerging contaminants on the fate of antibiotics in eco-environmental systems.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Meng Huo,Xiaowan Peng,Jin Zhao,Qiuwei Ma,Run Cai,Chun Deng,Bei Liu,Changyu Sun,Guangjin Chen
Using ionic liquids to capture CO to produce high-purity hydrogen (H 2 ) is a promising method. However, there is a lack of theoretical screening for CO capture, which can reduce the number of experiments and costs. In addition, ionic liquids need to reduce their viscosity and maintain an excellent CO capture effect. Therefore, The COSMO-RS was used to screen 300 ionic liquids using CO/H 2 selectivity and viscosity at 293.15 K as indicators. The results showed that the target ionic liquid screened was [EimH][CuCl 2 ]. The addition of ethylene glycol (EG) reduced the viscosity of [EimH][CuCl 2 ] and improved the CO capture ability. After adding 25 wt% EG, its separation factor of CO/H 2 could reach 180 at 293.15 K and 2.1 MPa, which was 59% higher compared to the pure ionic liquid. Furthermore, EG inhibits foaming, and the mixed solvent could maintain high stability after recycling.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Yanli Zhang,Zihao Su,Ke Xue,Jiafu Xing,Dingchao Fan,Jianguang Qi,Zhaoyou Zhu,Yinglong Wang
Ionic liquids (ILs) have been proposed as promising green solvents for the separation of azeotropes. In this work, the efficient separation of methyl tert-butyl ether (MTBE) from gasoline model oil using ILs was investigated from the molecular level (i.e., extraction mechanism) to process system integration (i.e., process simulation). The quantum chemistry (energy analysis and weak interaction) and molecular dynamics were implemented to explore the separation mechanism. Compared to benchmark organic solvents, 1-butyl-3-methylimidazolium nitrate ([BMIM][NO3]) and 1-ethanyl-3-methylimidazole hydrogen sulfate ([EMIM][HSO4]) had the highest extraction rate, and [NO3]− played a major role in the separation process. The extraction performance of MTBE from gasoline model oil using ILs was evaluated. [BMIM][NO3] had the highest extraction effect at 298.15 K. The efficient process of liquid–liquid extraction and extractive distillation with [BMIM][NO3] as an extractant were designed, which confirmed that ILs are promising extractants. This work provides a theoretical guideline to search and develop task-specific ILs for efficient recovery of MTBE.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）