JOURNAL OF MOLECULAR STRUCTURE
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2022
·
IF 3.841
Lulu Wang,Jing Lu,Yujia Wang,Haiyan Wang,Jilin Wang,Tieqiang Ren
In this study, a series of MIL-101-X catalysts were prepared by confining acidic ionic liquid phosphotungstate in MIL-101 nanocages using the organic electron-rich N-heterocyclic compound as a chemical bridge and the aforementioned catalysts were used for the oxidation of cyclohexene to adipic acid. During the aforementioned process of post-synthetic modification, a Bronsted acidic ionic liquid phosphotungstate ([C 3 SO 3 Hnhm] 3 PW 12 O 40 ) was synthesized in the nanocage of MIL-101. The research results reveal that the yield of adipic acid for the cyclohexene oxidation catalyzed by the constructed MIL-101-X catalyst was up to 78.16% in solvent-free condition. And its catalytic activity is not significantly reduced after six cycles. The novel catalyst synthesized in this paper combines the common advantages of ionic liquid phosphotungstate and MIL-101 nanocage microenvironment to facilitate the diffusion of reactants and their interaction with the catalytic activity center. This research will provide a new idea to solve the problem in terms of the shortage of efficient catalysts in the field of catalytic oxidation of cyclohexene to adipic acid.
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高影响因子
FUEL
·
2022
·
IF 8.035
Chong Chen,Yukun Zhang,Qiuhao Li,Yunlong Wang,Jun Ma
A series of N -doped carbons coupled with ultra-micropores were synthesized through a self-templated strategy by employing the guanidine-embedded poly(ionic liquid) as the versatile precursor. The crosslinking agent (N,N’-methylene bisacrylamide (MBA)) and the ionic liquid monomer (1-(4-vinylbenzyl)-tetramethylguanidinium chloride) distributed in the polymeric frameworks exerted the functions of not only the pore-forming agents, but also the nitrogen sources during pyrolysis. With the cooperation of these two components, the derived carbon materials were endowed with well-developed microporosity and evenly-dispersed nitrogen species. Besides, the divinylbenzene (DVB) was also an indispensable moiety to maintain the skeleton stability in the initial heating stage. Inspiringly, when the carbonization temperature and amount of KOH activator were selected as 700 °C and 2 mol/L, a large specific surface area of 1606.1 m 2 /g, a high ultra-micropore (<0.7 nm) content of 0.4314 cm 3 /g along with abundant pyrrolic-N sites were attained, contributing to the appealing performance for CO 2 capture. The adsorption capacity of the CTMG-700 achieved 3.95 mmol/g, and the selectivity toward CO 2 /N 2 mixture (V CO2 /V N2 = 15/85) was 20.4 at 25 °C and 1 bar. This strong affinity for CO 2 molecules was credited to the superposition of van der Waals’ force inside narrow ultra-micropores as well as the hydrogen-bonding and acid-base interactions originated from pyrrolic-N. In addition, the CTMG-700 also demonstrated satisfactory cyclic adsorption performance under mild regeneration conditions. The present work was intended to uncover a new strategy to construct advanced carbonaceous materials via tailoring the microstructure of poly(ionic liquid)-based precursors for gas separation or specific applications.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Jingyu Ma,Xiaoyan Ma,Hengpu Zhang,Fang Chen,Xinghua Guan,Jiaping Niu,Xiangpan Hu
Quasi-solid electrolytes (QSEs) with high safety and flexibility can provide relatively high ionic conductivity and electrode/electrolyte interface compatibility. However, it also suffers from challenges of mechanical strength and stable cycling at room temperature. Herein, we design and prepare a poly(ionic liquid) electrolyte by in-situ thermally initiate crosslinking polymerization of poly(ethylene glycol) methyl ether methacrylate (PEGMEM) and 1-vinyl-3-isobutyrate ethyl imidazole bis(trifluoromethylsulfonyl) imide (VBIM-TFSI) on the electrode surface with polyhedral oligomeric silsesquioxane (POSS)/polyvinylidene fluoride (PVDF) electrospun membrane as reinforcement separator. The POSS/PVDF electrospun membrane improves the electrolyte's mechanical strength without compromising the thickness, while the stable lithium-ion transport channels in the cross-linked network by PEGMEM and VBIM-TFSI enhance the ionic conductivity, achieving stable cycling of the battery at ambient temperature. The electrolyte with molar ratio of PEGMEM and VBIM-TFSI of 1–2 (QSE-P 1 I 2 ) exhibits high ionic conductivity (2.15 × 10 −4 S cm −1 , 30 °C) and stable electrode/electrolyte interface properties . Meanwhile, the batteries assembled with QSE-P 1 I 2 realize stable cycle at room temperature. This study provides a promising strategy to utilize in-situ polymerization to improve electrode/electrolyte interfacial compatibility, improve ionic conductivity, and realize room temperature cycling of solid-state batteries.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 16
·7695-7703
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IF 3.925
Qi Wu,Changfeng Zhao,Qinzhong Wang,Jing Liu
This study proposes the efficient separation of Au(III)/Pd(II)/Pt(IV)/Rh(III) through the 2-mercaptobenzothiazole-functionalised ionic liquid ([C6mim][2MBT]) using a cloud point extraction system. Direct cloud point extraction of Au(III) (about 99.9%) was realised without involving any functionalised ionic liquids. A significant enhancement of the Pd(II) extraction performance was found by adding rationally constructed [C6mim][2MBT]. Consequently, a fairly high extraction percentage of about 99.4% was obtained. However, further advancement of the proposed cloud point extraction showed that it could not be applied for the preconcentration of Pt(IV) and Rh(III) without adding stannous chloride, which plays a critical role in the segregation and could be adjusted by changing the hydrochloric acid concentration. Under the optimised conditions, the Rh(III) extraction process shows a high yield percentage (ca. 83.0%), where the majority of Pt(IV) was enriched in the aqueous phase. In addition, the underlying possible extraction mechanism was investigated using UV-vis, FT-IR and TEM measurements, which indicated that TX-114 acted as a solvent for the extracted metals. The developed procedure reveals efficient direct Au(III)/Pd(II)/Pt(IV)/Rh(III) separation using [C6mim][2MBT] via cloud point extraction.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Qi Fan,Mengjiao Yi,Chunxiao Chai,Wenwen Li,Ping Qi,Jihui Wang,Jingcheng Hao
Hypothesis Stemming from their unique superiorities, Ti 3 C 2 -MXenes have emerged as versatile 2D materials for a myriad of appealing applications. However, two crucial issues are detrimental to maximize the inherent properties of MXenes for further specific developments, i.e. restacking problem and environmental instability. Experiments Herein, we develop an effective strategy, constructing water-in-ionic liquid (W/IL) Pickering emulsions with further polymerization of the continuous phase, to fabricate oxidation stability enhanced Ti 3 C 2 -MXene based porous materials. It is the first time to utilize a brand new platform between the immiscible IL and water for MXene nanosheets to assemble with guest species serving as building blocks for macromonoliths. Findings The prepared porous materials can provide elastic hollow-sphere structures derived from emulsion template, for wearable piezoresistive sensor with high sensitivity, excellent accuracy and favorable reproducibility. Intriguingly, ILs as dispersion and surface modification with polymeric ionic liquids (PILs) play indispensable roles in ameliorating oxidation stability of MXenes in porous materials, by virtue of quenching reactive oxygen species (ROS) and forming protective layer through the capping effect. Furthermore, the processed aerogels after supercritical drying can selectively absorb several organic solvents owing to their high hydrophobicity , abundant porosity and sufficient mechanical strength . All results indicate that the innovative strategy can simultaneously circumvent two major drawbacks of MXenes for the first time, and shed light on the opportunity to further enrich their practical applications by constructing multifunctional platform.
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PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 45
·期 14
·2621-2631
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IF 3.614
Pei-Ying Li,Jia-Hui Zhao,Nian Li,Bo Liu,Wen-Ge Zhang,Zi-Fan Zhu,Chao Yan,Ning-Lan Xiao,Hua-Jie Lai
Recently, pharmaceuticals and personal care products in the water environment exhibited potential risks to both human and aquatic organisms. In order to improve the sensitivity and accuracy of pharmaceutical detection, the polyimidazolyl acetate ionic liquid was synthesized by Radziszewski reaction and coated on cellulose filter papers as a thin-film extraction phase for extraction of non-steroidal anti-inflammatory drugs from water. The attenuated total reflection-infrared spectrometry, thermogravimetric analysis, and scanning electron microscope analyses demonstrated that the polyimidazolyl acetate ionic liquid was successfully prepared and attached to the surface of the cellulose filter paper through chemical bonding. The adsorption capacity of the homemade thin-film extraction material for the four non-steroidal anti-inflammatory drugs was greater than 8898 ng/cm 2 under the optimum conditions, and the desorption rate was over 90%. Then, a paper-based thin-film extraction phase-high-performance liquid chromatography-tandem mass spectrometry method was established for the extraction of non-steroidal anti-inflammatory drugs in water. This method provided limits of detection and limits of quantification were in the range of 0.02–0.15 and 0.17–0.50 μg/L, respectively. Hence, the obtained thin-film extraction phase showed excellent recovery and reproducibility for the target non-steroidal anti-inflammatory drugs with carboxyl groups from water.
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PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Lei Wang,Jing Chen,Ye Sha,Imtiaz Hussain,Bo Yu,Linlin Wu,Yijun Shi,Qun Gu,Zhenyang Luo,Xiaofeng Ma
Ion gels, polymer networks swollen with ionic liquid (IL), are ideal materials for application in flexible electronic devices. It remains a challenge to fabricate an ion gel with photo-healing, high mechanical properties, fatigue resistance and shear resistance. Herein, a well-defined diblock copolymer polystyrene- b -poly(methyl acrylate- r -7-(2′-methacryloyloyloxyethoxy)-4-methylcoumarin) (PS- b -P(DMA- r -MAOEMC), brief name: SMM, PS: IL-phobic segment and P(DMA- r -MAOEMC): IL-philic segment) was synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization. For comparison, a random copolymer P(DMA- r -MAOEMC) (MM) also be prepared. In dilute solution, the SMM can form spherical micelles with PS-core surrounded by P(DMA- r -MAOEMC) corona chains in an IL, 1-ethyl-3-methylimidazolium bis(trifluoromethane sulfone)amide ([C 2 mim][NTf 2 ]). In a suitable polymer concentration, the SMM and MM can form ion gels in [C 2 mim][NTf 2 ] under 365 nm UV light irradiation through photo-dimerization of coumarin groups in corona MM polymer chains of spherical micelles and photo-dimerization of coumarin groups in MM random polymer chains, respectively. Compared with the MM ion gel, the SMM ion gel has high mechanical properties, shear resistance and relatively high fatigue resistance. Under 254 nm UV light irradiation, photo-induced gel to jammed micelles transition for the SMM ion gel and photo-induced gel to sol transition for the MM ion gel occur due to photo-cleavage of dimer in polymer chains. Photo-induced jammed micelles - gel transition for the SMM ion gel and photo-induced sol - gel transition for the MM ion gel are reversible by alternating 365 nm and 254 nm UV light irradiation, whereby photo-healable materials can be fabricated. Compared to the MM ion gel, the SMM ion gel has high photo-healing efficiency. The electrochemical property of the SMM ion gel can be recovered completely after photo-healing.
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高影响因子
GREEN CHEMISTRY
·
2021
·Vol. 24
·期 1
·227-237
·
IF 10.182
Yizhou Tu,Huimin Wang,Pingping Yang,Guizhou Xu,Xuejiao Hu,Aimin Li,Xianchuan Xie
Pharmaceuticals and personal care products (PPCPs) are widely distributed in aquatic environments due to their large consumption and low biodegradability, causing ecological risks. In this study, a porous thienyl cyclodextrin polymer (Th-CDP) with a specific surface area of 730 m2 g−1 was synthesized in an ionic liquid system for the first time to remove PPCPs. The green and recyclable 1-ethyl-3-methylimidazolium chloride/ferric chloride ([EMIm]Cl/FeCl3) ionic liquid was synthesized as a solvent and catalyst, superior to traditional toxic organic solvents and heterogeneous catalysts. In Th-CDP synthesis, thienyl cyclodextrin (ThCD) was synthesized, followed by polymerization with the three-dimensional cross-linking agent trimethyl orthoformate (Tmof) in [EMIm]Cl/FeCl3via the Friedel–Crafts alkylation reaction. Th-CDP shows excellent adsorption towards the studied PPCPs (diclofenac, ibuprofen, carbamazepine, and sulfamethoxazole) due to the rich pore structure. In particular, Th-CDP achieved 90% removal of hydrophobic diclofenac and ibuprofen in 5 min, and the rate constants were 16.7 and 10.5 times higher than those of activated carbon, respectively. The adsorption capacity of Th-CDP is related to the molecular weight and pKa of the compound, and is about twice that of activated carbon. Th-CDP has more pronounced adsorption advantages over activated carbon for acidic compounds due to its positive charge under neutral conditions. In addition, multiple mechanisms, including hydrophobic interaction caused by thiophene and cyclodextrin, electrostatic interaction, and heteroatom interaction (24.8% S content), enable Th-CDP to efficiently remove PPCPs. Moreover, Th-CDP has great application potential due to its excellent regenerability, anti-interference ability, and green synthesis process.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Kaixin Liu,Mingfei Pan,Liping Hong,Xiaoqian Xie,Jingying Yang,Shan Wang,Zhijuan Wang,Shuo Wang
A hydrophobic carboxyl functionalized phosphonium-based ionic liquid (IL) (( 5 -carboxypentyl) triphenylphosphonium bis (trifluoromethyl)sulfonyl) amide, TPP-HA[TFSI]) was synthesized through a simple hydrothermal approach. Based on the π-π and cation-π interactions with multi-wall carbon nanotubes (MWCNTs), a TPP-HA[TFSI]@MWCNTs hybrid was prepared to immobilize hemoglobin (Hb) to fabricate a simple and effective electrochemical sensing platform for the detection of methyl parathion (MP) in vegetables. Spectroscopic and electrochemical results show that TPP-HA[TFSI]@MWCNTs substrate synergistically provided a good biocompatible microenvironment for Hb, and the hydrophobicity of TPP-HA[TFSI] and the π-π interaction and hydrogen bonding between TPP-HA[TFSI]@MWCNTs, Hb and nafion (NF) were conducive to maintain the stability and integrity of the modified electrode interface. The TPP-HA[TFSI]@MWCNTs with large surface area and high conductivity promoted the exposure of the electroactive center of Hb and the direct electron transfer between Hb and the electrode, which effectively amplified the electrochemical signal and improved the sensitivity of MP detection. The constructed electrochemical sensing platform had a wider linear range (2–14 ng mL -1 ) and a lower detection limit (0.62 ng mL -1 ) for MP, and had acceptable repeatability, reproducibility, stability and anti-interference ability. This results indicated that the phosphonium-based ILs functionalized MWCNTs was an effective substrate for the immobilization of biological components, which have broad prospect in the construction of electrochemical sensing interfaces.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Junyuan Hua,Jintao He,Hongchang Pei,Jiahui Du,Xiaohua Ma,Jianxin Li
The high similarity in chemical properties between Li + and Mg 2+ poses a substantial challenge for their selective separation from salt lake brine with high Mg-Li (m/m) ratios. Herein, a highly efficient solvent extraction system was reported for Li + /Mg 2+ selective separation, with tributyl phosphate (TBP) and di(aminobenzo)-14-crown-4 (CE) as extractants, [C 4 mim][NTf 2 ] (IL) as co-extractant, and methylene chloride as a diluent. Simulated brines included 0.01 M LiCl and 0.01 and 0.2 M MgCl 2 with Mg/Li mass ratios of 3.5 and 70, respectively. Molecular dynamics (MD), density functional theory (DFT), and 1 H NMR analysis were employed to reveal the hydrogen bond interaction and compatibility between CE, TBP, and IL. Under the optimal extraction conditions containing a concentration of 20 mg/mL CE and 0.61 mmol/mL IL, the maximum single-stage Li + extraction rate of the TBP-CE-IL extraction system with Mg/Li mass ratios of 3.5 and 70 were 89.5 and 81.8 %, and the separation factor of Li to Mg were up to 515 and 422. Compared with the TBP-IL extraction system, the addition of CE effectively improved the extraction rate of Li + and the selectivity of Mg-Li, which was due to the hydrogen bond interaction between CE and TBP/IL and the cavity size effect between CE and Li + , improving CE coordination and endowing the complex generated in the organic phase with greater stability. The possible structure of the complex in the organic phase was determined to be 2TBP·Li·NTf 2 -CE·Li·NTf 2 through Li + extraction dynamic analysis. In summary, this work provides an efficient separation technology for Li + extraction from salt lake brine.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Zhenning Yan,Xingxing Cao,Meng Sun,Lulu Zhang
The pharmaceutically active form of an ionic liquid , cetylpyridinium salicylate ([CetPy][Sal]), was synthesized, and the intermolecular interactions of [CetPy][Sal] with amino acids (glycine, L-alanine, L-valine, and L-leucine) and glycylglycine (AAGG) in aqueous media were investigated by measuring the density, conductivity and UV–visible spectra at different temperatures. The measured density data was used to compute the apparent molar volume at infinite dilution, V 2, φ 0 , the hydration number , n H , the transfer volume, ∆ t V 0 , and the apparent molar expansibility at infinite dilution, E ∅ o , of AAGG in aqueous [CetPy][Sal] solution. The measured electrical conductivity was used to calculate the critical micelle concentration, cmc , and the relative thermodynamic quantities for the micellization of [CetPy][Sal] in an AAGG solution, i.e. the changes in the Gibbs free energy , the enthalpy, and the entropy. The binding constants between [CetPy][Sal] and AAGG were derived from UV–vis spectroscopic data . The aforementioned properties were analyzed in terms of the molecular interactions and structural changes existing in the studied ternary solutions of (AAGG +[CetPy][Sal]+water).
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高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2020
·Vol. 49
·期 4
·423-457
·
IF 1.273
Cai Guangming,Yang Shaoqi,Wang Xinxin,Zhou Qing,Xu Junli,Lu Xingmei
2-hydroxy- N -(2-hydroxyethyl)- N -methylethanaminium methanesulfonate ([BHEM][mesy]) displayed good ability for separating cellulose from biomass material in previous works. In order to have a better understanding of the structure–property relationship and facilitate further potential applications in industry, it is necessary to obtain more data for the physicochemical properties of [BHEM][mesy] and its mixtures. In this work, the densities ( ρ ) and viscosities ( η ) of [BHEM][mesy] + solvents (water, methanol, ethanol, n -propanol and isopropanol) mixtures were measured at six temperatures from (298.15 to 323.15) K over the full molar composition range and fitted by an empirical quadratic equation and Vogel–Fucher–Tammann (VFT) equation. Moreover, the excess molar volumes ( V E ) and viscosity deviation (Δ η ) of five binary mixtures were calculated and correlated by the Redlich–Kister equation. In addition, the apparent molar volumes ( \({V}_{\varphi }\) ) and partial molar volumes ( \(\stackrel{-}{V}\) ) of [BHEM][mesy] and solvents were also calculated and all these physicochemical property data (density, viscosity, excess molar properties as well as the apparent molar properties) are discussed in terms of the structure and interaction of binary mixtures.
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高影响因子
危险品化学品经营许可证（带存储）