CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2015
·
IF 1.098
Jianguo Yang,Shuo Liu,Huanan Hu,Shibin Ren,Anguo Ying
A simple and efficient method is proposed for the synthesis of tetrahydrobenzo[b]pyrans with aromatic aldehydes, active methylene compounds, and dimedone using basic ionic liquid catalyst in water. The procedure offers several advantages including short reaction time, good yield, easy procedure, and good recyclability of catalysts, which may be a practical alternative to conventional processes for preparation of 4-hpyrans.
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高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Heng Zhang,Chengyong Liu,Liping Zheng,Wenfang Feng,Zhibin Zhou,Jin Nie
New solid polymer electrolytes (SPEs) comprised of lithium bis(fluorosulfonyl) imide (Li[N(SO 2 F) 2 ], LiFSI) and polymeric ionic liquid (i.e., poly[ N , N -dimethyl- N -[2-(methacryloyloxy) ethyl]- N -[2-(2-methoxyethoxy) ethyl]ammonium] bis(fluorosulfonyl) imide, P[C 5 O 2 N MA,11 ]FSI) have been prepared and characterized. For comparison, the corresponding SPEs, lithium bis(trifluoromethylsulfonyl) imide (Li[N(SO 2 CF 3 ) 2 ], LiTFSI)/poly[ N , N -dimethyl- N -[2-(methacryloyloxy) ethyl]- N -[2-(2-methoxyethoxy) ethyl]ammonium] bis(trifluoromethylsulfonyl) imide (P[C 5 O 2 N MA,11 ]TFSI), are also prepared and characterized. Their physicochemical properties have been investigated in terms of phase transition behavior, ionic conductivity , lithium-ion transference number ( t Li + ), electrochemical stability, and with particular attention to the interfacial behavior between lithium electrode and SPEs. It has been demonstrated that the ionic conductivities of LiFSI/P[C 5 O 2 N MA,11 ]FSI electrolyte are higher than those of the corresponding TFSI-based one. The interface resistances of Li symmetric cell (Li metal | polymer electrolytes | Li metal) using LiFSI/P[C 5 O 2 N MA,11 ]FSI electrolyte are much lower than those using LiTFSI/P[C 5 O 2 N MA,11 ]TFSI electrolyte. These outstanding properties of the FSI-based electrolyte make it attractive as SPEs for Li battery .
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高影响因子
Journal of Analytical Methods in Chemistry
·
2018
·
IF 1.262
Luwei Fang,Minglei Tian,Xuemin Yan,Wei Xiao
A solid-phase extraction method was developed by using new bifunctional ionic liquid-based silicas as sorbents to isolate aflatoxin B1 from moldy corn and peanut. Firstly, according to the adsorption efficiency, two sorbents imidazolium chloride-butylimidazolium chloride-based silica (Sil@BIm-Im) and imidazolium chloride-hexylimidazolium chloride-based silica (Sil@HIm-Im) were selected. The RSM was introduced to optimize adsorption conditions such as methanol/water ratio, time, and pH. Sil@HIm-Im, which had the highest adsorption efficiency, was used in SPE as a sorbent. After 2.0 mL of loading samples, washing solvents were optimized as 6.0 mL and 4.0 mL of water for corn and peanut, 2.0 mL of acetonitrile, and 3.0 mL of methanol. 3.0 mL of methanol/acetic acid (2.0% vol.) was investigated as an elution solvent. Finally, 0.009 μg/g and 0.023 μg/g of aflatoxin B1 were obtained in corn and peanut extract with recoveries of 80.0%–103.3% and RSDs of 2.37%–6.58%.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chong Chen,Yunzhao Xu,Jiacan Shao,Yaru Zhang,Mengting Yu,Lei Sun,Hongyan Wang,Yong Xie,Guang Zhu,Li Zhang,Likun Pan
In this work, nitrogen and fluorine co-doped porous carbon nanosheets (NFPCNS) were fabricated from pharmaceutical drug residues derived from the fermentation synthesis of lincomycin hydrochloride via high-temperature pyrolysis and subsequent KOH activation without adding any nitrogen and fluorine reagents. The obtained NFPCNS exhibits an optimized integration of three dimensional interconnected nanosheet structure, large specific surface area of 2912 m 2 g −1 , hierarchical porous structure with large mesopore proportion ( S meso / S micro = 151.5%, V meso / V micro = 248.2%) and high level heteroatom content (13.2 at.% O, 4.3 at.% N and 1.0 at.% F). Therefore, NFPCNS based supercapacitors using 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte exhibit an excellent gravimetric capacitance of 296F g −1 at 1 A g −1 , good rate capability of 65% at 20 A g −1 and high energy density of 125 Wh kg −1 . Furthermore, an ultra-high energy density of 173 Wh kg −1 and a long cycling life with 93% capacitance retention after 2000 cycles has been achieved by NFPCNS based supercapacitors with 1-ethyl-3-methylimidazolium bis[( trifluoromethyl ) sulfonyl ]imide electrolyte. NFPCNS should be a green and efficient electrode materials for next-generation high-energy supercapacitors.
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PubMed
高影响因子
CHROMATOGRAPHIA
·
2012
·Vol. 75
·期 23
·1421-1433
·
IF 1.195
Shu Jianjun,Li Chan,Liu Mingming,Liu Hanlan,Feng Xionghan,Tan Wenfeng,Liu Fan
Three alkoxyl-functionalized ionic liquids, 1-(3-triethoxysilyl propyl)-3-methyl imidazolium hexafluorophosphate (TESPMIM[PF 6 ]), 1-(3-triethoxysilyl propyl)-3-methyl imidazolium tetrafluoroborate (TESPMIM[BF 4 ]), and 1-(3-triethoxysilyl propyl)-3-methyl imidazolium bis(trifluoromethanesulfonyl)imide (TESPMIM[N(SO 2 CF 3 ) 2 ]), were synthesized and used as selective coating materials to prepare chemically bonded ionic-liquid-based organic–inorganic hybrid solid-phase microextraction (SPME) fibers by sol–gel technology. A possible mechanism of the sol–gel process is proposed, and the successful binding of ionic liquids to the formed silica substrate was confirmed by Fourier-transform infrared spectroscopy (FT-IR). These ionic-liquid-based sol–gel coatings have porous surface structure, high thermal stability, strong solvent resistance, wide pH application range, good coating preparation reproducibility, special selectivity, and extraction efficiency for both polar and nonpolar compounds, such as phenolic environmental estrogens, fatty acids, aromatic amines, alcohols, phthalate esters, and polycyclic aromatic hydrocarbons. The TESPMIM[PF 6 ]- and TESPMIM[BF 4 ]-coated fibers have much lower thermal stability (to 300 and 285 °C, respectively) than TESPMIM[N(SO 2 CF 3 ) 2 ]-coated fiber (to 454 °C). However, the selectivity of these two fibers is higher towards strong polar analytes, while lower towards medium polar or nonpolar analytes compared with TESPMIM[N(SO 2 CF 3 ) 2 ]-based fiber. This could be explained by the fact that different counteranions in ionic liquid structures have different steric hindrance, nucleophilicity, hydrophobicity, and ability to form hydrogen bonds, resulting in significant difference in the characteristics of the ionic-liquid-based SPME fibers, such as the surface morphology, thermal stability, selective extraction ability, etc. This work demonstrates that the performance of the ionic-liquid-based coatings can be simply tuned by changing the counteranions incorporated into the ionic liquid structures.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 7
·3045-3051
·
IF 3.288
Junkang Guo,Yanping Li,Xinhao Ren,Huihui Xu,Ting Wei,Honglei Jia,Li Hua,Yi Zhang,Yongtao Li
A hydrophobic functional ionic liquid (IL) [N4444]AOT based on bis(2-ethylhexyl)sulfosuccinate anions was designed and synthesized for cadmium extraction. To study the characteristics of [N4444]AOT, Fourier transform infrared (FTIR) spectroscopy, hydrogen nuclear magnetic resonance spectroscopy (1H NMR), and thermogravimetric analysis were used. The extraction ability of [N4444]AOT towards Cd under ultrasonic conditions was also investigated. The results showed that more than 95.08% of Cd in a water solution could be extracted with [N4444]AOT under ultrasonic conditions. The results of FTIR and 1H NMR analyses showed that Cd mainly coordinated with the S–O bond provided by [N4444]AOT during extraction. The extraction of Cd from soil with [N4444]AOT was high and reached the value of 62.57%. Furthermore, [N4444]AOT could extract some stable and bound Cd species from the soil, which existed in a weakly acidic, reducible or oxidizable state. The application of [N4444]AOT significantly decreased the bioavailability of Cd in the soil. [N4444]AOT can be a good agent for Cd-contaminated soil remediation without changing the soil properties.
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高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2015
·Vol. 38
·期 18
·3279-3287
·
IF 2.737
Ji Li,Xiaoling Hu,Ping Guan,Dongmen Song,Liwei Qian,Chunbao Du,Renyuan Song,Chaoli Wang
In this study, dummy imprinting technology was employed for the preparation of l- phenylalanine-imprinted microspheres. Ionic liquids were utilized as both a “dummy” template and functional monomer, and 4-vinylpyridine and ethylene glycol dimethacrylate were used as the assistant monomer and cross-linker, respectively, for preparing a surface-imprinted polymer on poly(divinylbenzene) microspheres. By the results obtained by theoretical investigation, the interaction between the template and monomer complex was improved as compared with that between the template and the traditional l- phenylalanine-imprinted polymer. The batch experiments indicated that the imprinting factor reached 2.5. Scatchard analysis demonstrated that the obtained “dummy” molecularly imprinted microspheres exhibited an affinity of 77.4 M·10 −4 , significantly higher that of a traditional polymer directly prepared by l- phenylalanine, which is in agreement with theoretical results. Competitive adsorption experiments also showed that the molecularly imprinted polymer with the dummy template effectively isolated l- phenylalanine from l- histidine and l- tryptophan with separation factors of 5.68 and 2.68, respectively. All these results demonstrated that the polymerizable ionic liquid as the dummy template could enhance the affinity and selectivity of molecularly imprinted polymer, thereby promoting the development of imprinting technology for biomolecules.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yihan Li,Lin Zhao,Daying Chen,Tapas Sen,Guining Lu,Jiashu Liu,Xiaodong Du,Peizhe Sun,Yongkui Yang
As emerging contaminants, antiviral drugs (ATVs) in water pose an increasing threat to human health and the ecosystem. Using specific and selective adsorption methods to remove ATVs remains challenging due to their trace concentration in real matrices. In this study, pyridine ionic liquid ([BPy][Sal])-modified metal–organic framework (MOF), a type of novel material, was synthesized as [BPy][Sal]@MOF to adsorb ATVs with different molecular structures, i.e., Arbidol (Arb) and Favipiravir (Fav). Arb adsorption followed the pseudo-second-order model, indicating that chemisorption is the dominant process. The Langmuir isothermal model showed that the maximum adsorption capacities toward Arb and Fav were 506.9 and 35.3 mg g −1 , respectively, suggesting specific adsorption of Arb on [BPy][Sal]@MOF. Density functional theory (DFT) was used to investigate the specific adsorption mechanism. The molecular electrostatic potential and the intermolecular weak interaction analysis using the DFT method illustrated that the amino hydrogens in MOF could form hydrogen bonds (N H O) with the hydroxyl oxygens in Arb. Simultaneously, the indole ring in Arb could cause π–π interaction with the pyridine ring in [BPy][Sal] part from [BPy][Sal]@MOF. In contrast, the adsorption of Fav only involved π–π interaction between the benzene rings in Fav and the MOF part from [BPy][Sal]@MOF. The adsorption energy and energy gap calculation results verified that the adsorption strength of Arb was higher than that of Fav, and the key role of [BPy][Sal] in [BPy][Sal]@MOF helped achieve specific adsorption was confirmed. [BPy][Sal]@MOF exhibited exceptional recyclability after five adsorption–desorption cycles in environmental waters, demonstrating its excellent adsorption performance in practical applications.
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产品关联
DOI
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Qianwen Liu,Lingling Zhou,Siyu Xin,Qingli Yang,Wei Wu,Xiudan Hou
A poly (ionic liquid) enhanced poly(acrylamide-acrylic acid) (PIL-PAM/AA) hydrogel-based colorimetric sensor was designed to detect zearalenone (ZEN). Different Au x Pt y nanoparticles were synthesized via the on-pot method. Through the kinetic analysis and the theoretical calculation, Au 0.4 Pt 0.6 possessed the relatively low energy barriers to adsorb and decompose H 2 O 2 so that it exhibited relatively better catalytic activity (K m = 2.02 × 10 −3 , V max = 6.14 × 10 −7 ). AuPt nanoparticles were encapsulated into PIL-PAM/AA hydrogel via the interaction between aptamer and cDNA. In the presence of ZEN, the embedded AuPt nanoparticles were released to complete the catalytic reaction. Coupled with the smartphone application, the established method provided the linear range of 1–250 ng mL −1 , with a detection limit of 0.6979 ng mL −1 for ZEN. Meanwhile, it also possessed excellent selectivity and good anti-interference performance. In wheat and corn samples, spiked recoveries were ranging from 75% to 113.30%.
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产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Meng Wang,Songquan Li,Peixiu Tian,Yongzhong Jin,Chao Li,Guixiang Qin,Fusen Wu,Kaiyi Lin
Achieving effective dispersion of carbon nanotubes (CNTs) within rubber matrices persists as a major impediment to their industrial-scale utilization. This investigation innovatively utilized the ionic liquid (IL) 1-butyl-3-methylimidazolium chloride to functionalize CNTs, thereby markedly improving their dispersion state and interfacial bonding with a natural rubber (NR) phase. This enhancement led to substantial improvements in the mechanical performance of the resulting composites. Incorporation of 8 phr IL-modified CNTs into a silica/NR composite system yielded a 300% modulus of 15.98 MPa, a tear strength of 84.41 kN/m, and a relative volume wear resistance of 190.88 mm 3 . These values correspond to significant enhancements of 22.38%, 53.70%, and 10.51%, respectively relative to composites containing pristine CNTs. Studies confirmed that the performance gains are primarily ascribed to the superior dispersion and reinforced interfacial adhesion of the IL-modified CNTs within the rubber matrix. This optimized morphology enables efficient load transfer, critically boosting the composite reinforcement efficiency. This work underscores the pivotal function of ionic liquids in ameliorating nanofiller dispersion, presenting an innovative methodology for designing and fabricating high-performance rubber nanocomposites.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 22
·13192-13202
·
IF 2.599
Meng Yanshuang,Wang Gongrui,Xiao Mingjun,Duan Chaoyu,Wang Chen,Zhu Fuliang,Zhang Yue
In this work, a novel composite of Co 3 O 4 nanoparticle and carbon nano-onions (CNOs) is synthesized by using ionic liquid as carbon and nitrogen source through a facile carbothermic reduction followed by low-temperature oxidation method. The SEM and HRTEM images reveal that the Co 3 O 4 particles are homogenously embedded in the CNOs. Due to the unique nano-structure, the electrolyte contacts well with the active materials, leading to a better transfer of lithium ions. Moreover, the unique nano-structure not only buffers the volume changes but also facilitates the shuttling of electrons during the cycling process. As a result, the electrode made up of Co 3 O 4 /CNOs composite delivers favorable cycling performance (676 mAh g −1 after 200 cycles) and rate capability (557 mAh g −1 at the current of 1 C), showing a promising prospect for lithium-ion batteries as anode materials.
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高影响因子
ENERGY & FUELS
·
2016
·
IF 2.835
Zuowang Wu,Chong Chen,Hui Wan,Lei Wang,Zhong Li,Bingxue Li,Qirui Guo,Guofeng Guan
A magnetically recyclable and efficient catalyst for biodiesel synthesis was fabricated by confining the Brønsted ionic liquid 1,4-butanediyl-3,3′-bis(3-sulfopropyl) imidazolium dihydrogensulfate in an amino-functionalized magnetic metal–organic-framework composite (Fe3O4@NH2-MIL-88B(Fe)) through a simple and efficient strategy via the amino groups. The catalyst was systematically characterized, proving ionic liquid was grafted in the amino-functionalized carrier, and the catalyst was spindle-shaped with superparamagnetism (7.2 emu/g). The prepared catalyst with high acidity (1.76 mmol H+ g–1) exhibited good catalytic activity in biodiesel synthesis from oleic acid and ethanol with a yield of 93.2%, optimized by Box-Behnken response surface methodology. The fine catalytic performance of the catalyst was mainly due to the combination of the characteristics of the ionic liquid and the structure of Fe3O4@NH2-MIL-88B(Fe). Moreover, the catalyst was recycled without significant loss of activity after being used for six runs and could be magnetically separated in magnetic force without obvious mass loss.
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高影响因子
危险品化学品经营许可证（带存储）