JOURNAL OF SUPERCRITICAL FLUIDS
·
2011
·
IF 2.986
Jintao Yang,Yan Sang,Feng Chen,Zhengdong Fei,Mingqiang Zhong
We present the synthesis and characterization of silica particles modified by a poly(ionic liquid), namely, poly[2-(methacryloyloxy)ethyl]trimethylammonium tetrafluoroborate (P[MATMA][BF 4 ]), which has a strong carbon dioxide absorption, and its application as a nucleation agent in polymer foaming. Silica particles with different particle sizes were fabricated by the sol–gel method and then grafted with (P[MATMA][BF 4 ]) brushes by surface-initiated atom-transfer radical polymerization. The modified silica particles (SiO 2 P[MATMA][BF 4 ]) were introduced into a polystyrene matrix by solution blending. The (P[MATMA][BF 4 ]) brushes grafted onto the silica particles were able to slightly increase the carbon dioxide solubility, and consequently, SiO 2 P[MATMA][BF 4 ] showed a higher heterogeneous nucleation efficiency in the foaming process compared to amino-functionalized silica particles (SiO 2 NH 2 ) used as control.
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RSC Advances
·
2014
·Vol. 4
·期 68
·36031-36035
·
IF 3.708
Anlian Zhu,Shukun Bai,Wei Jin,Ruixia Liu,Lingjun Li,Yang Zhao,Jianji Wang
In this work, it was found that acidic protic ionic liquid N,N-dimethylaminoethanol hydrosulfate ([DMEA][HSO4]) was an efficient and reusable catalyst for the one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under solvent-free conditions. This ionic liquid is very cheap, air and water stable, and can be easily recovered and reused for at least six cycles. The catalytic system described here is a green protocol since in the one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes, the yield of the target compounds is excellent, operation and work-up procedures are simple, and no volatile organic solvents have been used. It is suggested that the synergetic effect of the cation and the anion of this ionic liquid is the main reason for the high catalytic activity and high chemo-selectivity. Scale-up experiments also suggest that this catalytic system has potential in industrial application.
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International Journal of Electrochemical Science
·
2023
·Vol. 12
·期 12
·11633-11645
·
IF 1.5
Xiuqiong Chen,Meixi Feng,Huiqiong Yan,Wei Sun,Zaifeng Shi,Qiang Lin
To achieve the accurate determination of trichloroacetic acid (TCA) in water chlorination, the sensitive electrochemical biosensor, Nafion/myoglobin-sodium alginate-graphene composite modified carbon ionic liquid electrode (Nafion/Mb-SA-GR/CILE), was fabricated by the electrodeposition method. Spectroscopic results implied that Mb could keep its biological activity in the SA-GR composite film. Direct electrochemistry of Nafion/Mb-SA-GR/CILE indicated that direct electron transfer of Mb was realized on the modified electrode, which was attributed to the synergistic effects of SA-GR composite film with excellent electrocatalytic capability and good biocompatibility. Furthermore, the modified electrode displayed good electrocatalytic ability towards TCA with the linear range from 7.5 to 69.0 mmol/L and a low detection limit of 0.163 mmol/L (3σ). Meanwhile, the modified electrode possessed good stability, reproducibility and excellent accuracy for the detection of tap-water, exhibiting great potentials for electroanalysis and electrocatalysis applications.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2022
·
IF 6.437
Zhong-Qiu Liu,Guo-Qiang Zhang,Xin Huang,Yuan-Yuan Yu,Yu-Jing Liu,Anguo Ying
The precise synthesis of multifunctional poly(ionic liquid)s (MFPILs) featuring basic sites, mesoporous channels, and hydrophobicity continues to be a substantial challenge. Moreover, the directional conversion of lignite to monocyclic arenes (MCAs) is highly attractive but particularly challenging on account of its geometrical complexity and chemical inertness. The efficiency of lignite directional conversion to MCAs over solid bases is substantially decreased by the presence of water molecules leading to the deactivation and leaching of basic sites. Herein, the novel solid bases, i.e. , MFPILs with dibasic sites, unique hydrophobicity , and abundant mesoporous channels, were successfully fabricated by a radical multicomponent cross-linked copolymerization for the first time. Even more excitedly, the resulting MFPILs were demonstrated to be very efficient for directional catalytic hydroconversion of extraction residue from Dahuangshan lignite (DL ER ) into MCAs with 32.3 wt% yield, which is by far the highest value reported for lignite-derived MCAs by solid bases under similar conditions. The synergistic catalysis, i.e. , hydrophobic microenvironment, mesoporous confinement, and synergistic effect of dibasic sites, for active hydrogen transfer of DL ER conversion into MCAs over MFPILs is confirmed by characterization methods. The work not merely sheds substantial light on developing the novel solid bases, but also exhibits a potentially powerful catalyzing strategy to synthesize MCAs.
研究领域:
催化化学
·
高分子化学
·
能源材料
·
可持续化学
·
有机转化
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Materials Today Chemistry
·
2026
·
IF 7.4
Jinhao Gao,Lei Xiao,Xiaohong Jiang,Wenliang Zhang,Hanbin Liu,Zhijian Li,Guodong Liu
EMIM TFSI and ethylene glycol reconstruct conductive PEDOT:PSS networks. • EMIM TFSI regulates perovskite wetting and crystallization to suppress defects. • Layer-specific regulation enables high-luminance air-processed PeLECs. Air-processed perovskite light-emitting electrochemical cells (PeLECs) are attractive for solution-processed light emission because of their simple device architecture and mobile-ion-assisted charge injection. However, their performance is still limited by resistive electrode-side charge transport, nonuniform perovskite film formation, and defect-assisted nonradiative recombination under ambient fabrication conditions. Here, we introduce 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM TFSI) as a multifunctional ionic liquid additive to address losses in both the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) electrode and the perovskite emissive layer. The asymmetric EMIM + /TFSI − ion pair provides distinct ionic and interfacial interactions, enabling layer-dependent regulation of charge transport, film formation, and surface defect environments. In the PEDOT:PSS electrode, ethylene glycol (EG)-assisted EMIM TFSI treatment promotes PEDOT-rich domain enrichment and improves the interconnection of conductive pathways, increasing the conductivity to 4676 S cm −1 while maintaining a visible transmittance of 85.9%. In the perovskite emissive layer, EMIM TFSI improves precursor wetting and regulates nucleation/crystallization processes, leading to smoother, more compact, and more crystalline films. Meanwhile, EMIM TFSI-associated surface regulation modifies the Pb/Br-related local chemical environment, reduces energetic disorder, and suppresses defect-assisted nonradiative recombination, increasing the photoluminescence quantum yield from 54.6% to 66.7%. As a result, the dual-modified air-processed PeLEC achieves a maximum luminance of 3382.6 cd m −2 and a maximum external quantum efficiency of 5.83%. This work demonstrates a multifunctional ionic liquid regulation strategy for coupling electrode conductivity, emissive-layer quality, and electroluminescence output in structurally simplified air-processed PeLECs.
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LANGMUIR
·
2026
·Vol. 42
·期 34
·25343-25359
·
IF 4.4
Shan Jingyu,Gao Luyao,Liu Shibo,He Hongxin,Dong Rui,Wen Ping,Fan Mingjin
Achieving high performance and multifunctionality at
minimal concentration
is a critical demand for water-based lubricant additives yet remains
challenging in harsh environments, which is closely regulated to molecular
configuration and interfacial behavior. Herein, three protic ionic
liquids (PILs) with tailored polar groups and steric hindrance were
designed as additives for water glycol base fluids. The significantly
enhanced corrosion resistance, adsorption, and lubricity can be obtained
with the specific structure-activity relationship, resulting from
the strong interaction between PIL molecules and metal sliding asperity.
For anions, linear short-chain alkoxy PIL delivers the fastest adsorption
and optimal friction reduction, while the highly branched alkyl phosphorus
PIL provides maximal steric hindrance, providing superior antiwear
performance. The moderately branched long-chain alkoxy PIL achieves
an optimal balance between rapid film formation and tribo-chemical
reactivity, endowing the highest load-bearing capacity under variable
loads. Beyond lubrication, all three PILs exhibit broad-spectrum antibacterial
activity (99.99% inhibition against both Escherichia coli and Staphylococcus aureus ). Collectively, this work elucidates the governing role of anion
architecture in determining the comprehensive performance of water-based
multifunctional lubricants, offering a theoretical foundation for
developing advanced water-based additives.
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REACTIVE & FUNCTIONAL POLYMERS
·
2026
·
IF 5.4
Jie Xia,Liping Zhu,Yongqiang Ye,Yue Chen,Yangting Zeng,Kaiyuan Li,Fei Xiao
A facile and eco-friendly strategy was developed to synthesize IL@MOF hybrid FR. • The optimized composite achieved a UL-94 V-0 rating with a LOI value of 27.1%. • The peak heat release rate and total smoke production were reduced by −76.1% and −83.1%. • The reaction to fire and its underlying mechanisms were systematically characterized. The deployment of thermoplastic polyurethane (TPU) in high-safety applications is critically hindered by its inherent flammability and the emission of toxic smoke during combustion. To address these limitations, this study proposes a new strategy driven by structural engineering and spatial confinement. Specifically, a zeolitic imidazolate framework-8 (ZIF-8) precursor was selectively etched using an eco-friendly tannic acid to engineer a mesoporous host architecture (TZIF-8). By encapsulating a bespoke phosphorus-containing ionic liquid (PMDP) within these tailored cavities, a highly efficient inorganic-organic hybrid (PM@TZ) was synthesized. It was subsequently compounded with piperazine pyrophosphate (PAPP) to construct a synergistic fire-protection network within the TPU matrix. The optimized composite (incorporating 6.5 wt% PAPP and 1.5 wt% PM@TZ) demonstrated excellent flame retardancy, achieving a UL-94 V -0 rating alongside a limiting oxygen index (LOI) of 27.1%. Forced-flaming evaluations confirmed dramatic reductions in the peak heat release rate (−76.1%), total heat release (−62.1%), and total smoke production (−83.1%) relative to the TPU. Mechanistic investigations across the volatile and condensed phases elucidated a robust synergic reaction to fire. The liberation of active phosphorus radicals facilitates profound gas-phase flame quenching, whereas the confined ionic liquid and MOF-derived catalytic zinc nodes cooperatively accelerate the formation of a highly graphitized, heteroatom-doped (P/Zn) char barrier. In summary, this study provides a versatile structural engineering route for resolving the interfacial incompatibilities of ionic liquids, paving the way for next-generation, high-performance, fire-safe elastomers. Download: Download high-res image (170KB) Download: Download full-size image
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JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Xiang Wang,Zhiwei Zou,Jie Liu,Bin Long,Hanlin Zeng,Jingdong Peng
A novel fluorinated cross-linked poly(ionic liquid) stationary phase was developed. • Multi-modal separations are achieved with a single fluorinated stationary phase. • Enhanced resolution of organic halides using the fluorinated stationary phases. • The application of the stationary phase practices the concept of green chemistry. Green liquid chromatography has garnered increasing attention due to heightened environmental awareness among the public. In this work, a cross-linked poly(ionic liquid)-modified stationary phase was developed and was further functionalized with fluorine using 2,3,4,5,6-pentafluorostyrene. Chromatographic evaluations demonstrated the comprehensive separation capabilities of the mixed-mode HILIC/RPLC/IEX configuration, highlighting the potential to replace multiple single-mode columns with a mixed-mode column. High repeatable retention was achieved in green per aqueous liquid chromatography. The fluorine modification enhanced the stationary phase’s capacity to separate organic halides and their isomers. Finally, this stationary phase was used to separate and detect multiple analytes in everyday products, achieving satisfactory relative standard deviations (RSDs) and recoveries that typically require diverse columns and instruments under conventional methods. Overall, the results underscore the advantages of preparing green chromatography stationary phases using cross-linked poly(ionic liquid), as well as the superiority of mixed-mode chromatography for diverse routine analyses.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Qinming Wang,Jinlin Wan,Sen Wu,Xingfu Zhou
Commercially available carbon was used instead of the noble metals. • The grain size of the perovskite was doubly increased and grain boundaries were reduced by [C 6 Py]BF 4 modification. • [C 6 Py]BF 4 modification reduces the non-radiative recombination and enhances the charge transport. • The carbon-based device modified with 0.3 vol% [C 6 Py]BF 4 achieved an optimized efficiency of 15.42%. Additive engineering is one of the key strategies for enhancing the performance of perovskite solar cells. The ionic liquid 1-hexylpyridinium tetrafluoroborate ([C 6 Py]BF 4 ) was employed as an additive in the perovskite precursor solution. [C 6 Py]BF 4 can regulate the crystallization process of the perovskite. Meanwhile, N in the pyridinium group, possessing a lone electron pair, acts as a hydrogen bond acceptor, forming N-H···I hydrogen bonds with the I − in the perovskite. The formation of hydrogen bonds stabilizes the position of I − , suppressing its migration. Additionally, the BF 4 − passivates defects by coordinating with undercoordinated Pb 2+ . SEM characterization revealed that the perovskite films modified with [C 6 Py]BF 4 exhibited a doubling of grain size and a reduction in grain boundaries, resulting in a significant decrease in the defect density within the devices. Consequently, non-radiative recombination was suppressed, ion migration was mitigated, and charge carrier lifetime was improved. At the optimal concentration of 0.3 vol%, the power conversion efficiency of the device reached 15.42%, representing an 8.5% enhancement compared to the pristine device. Furthermore, the hysteresis effect was significantly reduced, and the long-term stability of the device was improved. The ionic liquid 1-hexylpyridinium tetrafluoroborate ([C 6 Py]BF 4 ) was employed as an additive in the perovskite precursor solution. After modification with [C 6 Py]BF 4 , the grain size of the perovskite film was significantly doubly increased, while grain boundaries were reduced, leading to a substantial decrease in defect density within the device. Consequently, non-radiative recombination was suppressed, ion migration was mitigated, and charge carrier lifetime was improved. At the optimal concentration of 0.3 vol%, the power conversion efficiency (PCE) of the device reached 15.42%, representing an 8.5% enhancement compared to the pristine device. Furthermore, the hysteresis effect was significantly reduced, and the long-term stability of the device was improved. Download: Download high-res image (148KB) Download: Download full-size image
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Inventions
·
2026
·Vol. 11
·期 3
·57
·
IF 2.4
Fenglin Zhang,Die Chen,Luo Zhang,Chenxia Zhao,Ming Zhang,Xinyi Li,Ting He,Zimiao Lu,Xiaohong He,Gengpei Xia,Dingyu Yang
Aqueous zinc-ion batteries (AZIBs) are promising for grid-scale storage due to their safety, low cost, and environmental benignity. However, water-dipole enrichment in the inner Helmholtz plane (IHP) of Zn anodes triggers hydrogen evolution, corrosion, and dendrites, limiting cycle life. We report a trace “ionic liquid–polar solvent coupling” strategy: adding only 0.01 M EMIMBF4and 0.03 M DMSO to 2 M ZnSO4electrolyte. Hydrophobic EMIM+adsorbs on the IHP to expel interfacial water, while BF4−enters the primary solvation shell and DMSO penetrates both first and second shells of Zn2+, forming a water-deficient coordination environment. This interfacial–solvation synergy suppresses parasitic reactions and directs preferentially oriented Zn deposition exclusively along the (101) facet, enabling dense vertical plating and in situ formation of a compact, inorganic-rich SEI (ZnCO3–ZnSO3–Zn(OH)2). Consequently, Zn||Zn cells cycle stably for >5362 h at 1 mA cm−2/1 mAh cm−2; Zn||Cu cells achieve 1300 cycles with 99.8% average Coulombic efficiency; and Zn||V2O5full cells retain 326.4 mAh g−1after 500 cycles. This work shows that minimal additive loading can simultaneously engineer the electrode–electrolyte interface and crystallographic deposition pathway, offering a simple yet robust design for ultra-stable AZIBs.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2017
·Vol. 29
·期 1
·623-631
·
IF 1.907
Yuan-Yuan Cheng,Chun-Hui Du,Chun-Jin Wu,Kai-Xiang Sun,Nian-Ping Chi
In this study, poly(1-butyl-3-vinylimidazolium bromide) (PBVIm-Br) was grafted onto the poly(vinyl chloride) (PVC) membrane surface via a 2-step atom transfer radical polymerization (ATRP) reaction. Poly(2-hydroxyethylmethacrylate) (PHEMA) was grafted onto the membrane surface by aqueous ATRP reaction; then, BVIm-Br was introduced onto the surface of the PHEMA-modified PVC membrane through traditional ATRP reaction. The analysis of surface chemistry confirmed the successful grafting of PHEMA and PBVIm-Br on PVC membrane surface, and the grafting density (GD) of PBVIm-Br gradually increased as the grafting time was prolonged. The modified membrane exhibited a positive charge and significantly enhanced surface hydrophilicity. The static water contact angle of the membrane surface decreased from 92.3° to 51.6° as the GD of the PBVIm-Br brushes increased. Filtration experiments indicated that the water flux of the modified membrane increased with increasing GD, and their recovered fluxes were more than twice than the original. In addition, the total fouling ratio of the membranes decreased from 89% in M0 to 67% in M5, and most of the fouling was reversible as the GD of PBVIm-Br brushes increased. These results indicated that the positive charged poly(ionic liquid) brushes featuring hydrophilic properties would have potential applications in membrane separation.
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Analytical Methods
·
2022
·Vol. 14
·期 46
·4775-4783
·
IF 3.532
Yuan Tao,Luyao Jia,Honglin Qin,Ruiting Niu,Lizhen Qiao
In this study, a new magnetic ionic liquid (MIL) was designed and prepared, containing a magnetic cation from the ligand N,N-dimethyl biguanide (DMBG) complexing with magnetic center Co2+ and a bis-trifluoromethanesulfonimide (NTf2−) anion. Using the MIL as the extraction solvent, a salting-out assisted dispersive liquid–liquid microextraction (SA-DLLME) combined with high performance liquid chromatography-ultraviolet detection (HPLC-UV) was established for the enrichment and detection of four parabens in environmental water samples. The one-factor-at-a-time experiment was employed to optimize the conditions affecting the extraction efficiency. Under the optimized extraction conditions, the limits of quantification (LOQs) of the four target analytes ranged from 2.0 ng mL−1 to 2.8 ng mL−1, and the coefficients of determination (R2) were above 0.9996 in the linear range of 2.8–400 ng mL−1. On the other hand, the method displayed good repeatability and accuracy with intra-day and inter-day relative standard deviations (RSDs) of 2.1–13.0% and recoveries of 82.0–114.6%. The established method was applied to real samples with recoveries within 81.6–125.4%, and the results demonstrated that the method was practical.
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