ANALYTICA CHIMICA ACTA
·
2015
·
IF 4.513
Miyi Yang,Xiaoling Wu,Yuhan Jia,Xuefei Xi,Xiaoling Yang,Runhua Lu,Sanbing Zhang,Haixiang Gao,Wenfeng Zhou
In this work, a novel effervescence-assisted microextraction technique was proposed for the detection of four fungicides . This method combines ionic liquid-based dispersive liquid–liquid microextraction with the magnetic retrieval of the extractant. A magnetic effervescent tablet composed of Fe 3 O 4 magnetic nanoparticles , sodium carbonate, sodium dihydrogen phosphate and 1-hexyl-3-methylimidazolium bis(trifluoromethanesulfonimide) was used for extractant dispersion and retrieval. The main factors affecting the extraction efficiency were screened by a Plackett–Burman design and optimized by a central composite design. Under the optimum conditions, good linearity was obtained for all analytes in pure water model and real water samples. Just for the pure water, the recoveries were between 84.6% and 112.8%, the limits of detection were between 0.02 and 0.10 μg L −1 and the intra-day precision and inter-day precision both are lower than 4.9%. This optimized method was successfully applied in the analysis of four fungicides (azoxystrobin, triazolone, cyprodinil , trifloxystrobin) in environmental water samples and the recoveries ranged between 70.7% and 105%. The procedure promising to be a time-saving, environmentally friendly, and efficient field sampling technique.
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高影响因子
RSC Advances
·
2019
·Vol. 9
·期 11
·5978-5986
·
IF 3.049
Shunyou Hu,Linlin Wang,Xiaopeng Chen,Xiaojie Wei,Zhangfa Tong,Lijiang Yin
The concept of a solid catalyst coated with a thin ionic liquid layer (SCILL) was applied to the stereoselective hydrogenation of α-pinene. Nickel, a non-noble metal, was supported on a discarded fluid catalytic cracking catalyst (DF3C) and then modified with different loadings of the ionic liquid 1-ethanol-3-methylimidazolium tetrafluoroborate ([C2OHmim][BF4]). The resulting catalysts showed a range of conversions and selectivities for the hydrogenation of α-pinene. The SCILL catalysts afforded cis-pinane with high selectivity and their activity depended on the ionic liquid loading. For an ionic liquid loading of 10 wt%, although the catalytic activity was suppressed, the selectivity and conversion could reach above 98% and 99%, respectively. In addition, the catalyst remained stable after 13 runs and the activity was almost unchanged with the conversion maintained at approximately 99%. Thus, the ionic liquid layer not only improved the selectivity for cis-pinane but also protected the active site of the catalyst and prolonged the service lifetime of the catalyst. The SCILL catalytic system provides an example of an ionic liquid catalytic system which eliminates organic solvents from the catalytic process.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Linkun Ji,Xinrui Zhou,Shanxu Han,Yi Rong,Qiang Guo,Kefeng Liu,Fei Gao,Zhongqi Ren,Zhiyong Zhou
To address the trade-off effect between high CO 2 loading and low regeneration energy consumption, a novel functionalized ionic liquid (IL) non-aqueous biphasic absorbent composed of diethylenetriamine-4-hydroxypiperidine/ethylene glycol/diethylene glycol dimethyl ether ([DETAH][4-HP]/EG/DGDE) was proposed for CO 2 capture. The optimal absorbent achieved a maximum CO 2 capacity of 2.09 mol·mol −1 , which is significantly higher than that of other IL absorbents with an equivalent number of amine groups. The regeneration energy was only 1.94 GJ·t −1 CO 2 , which is approximately 51.38 % lower than that of the 30 wt% monoethanolamine (MEA) aqueous solution. Reaction mechanisms were elucidated via 13 C NMR characterization and quantum chemical calculation. CO 2 initially reacted with the amino groups of [DETAH] + to form zwitterions and subsequently carbamate through deprotonation, while it directly bound with the amine site of [4-HP] − to form carbamate. Additionally, part of the carbamate further reacted with EG to generate alkyl carbonate. Weak intermolecular interaction analysis results indicated that EG formed dimeric structures with rich-phase products, facilitating the absorption process. Quantum chemical calculation further confirmed that the polarity difference of CO 2 products between solvents was the primary driver for phase separation. Moreover, [DETAH][4-HP]/EG/DGDE exhibited no corrosivity toward 20# carbon steel before and after CO 2 absorption, along with high stability against degradation, demonstrating strong potential for industrial carbon capture applications.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shiqian Gao,Min Pan,Jiarui Zhou,YiZhou Shen,Jianhui Wang,Xin He
The magnetic ionic liquid-modified fish-scale biochar (MIL/FSBC) was prepared via microwave-assisted pyrolysis (MWP) processes. The hydroxyapatite (HAP) were efficiently separated from the interior of collagen fibrils with magnetic ionic liquid [C 4 min]FeCl 4 . The synergistic activation of HAP liberation combined with MIL process significantly increased the MWP efficiency of fish scale biomass. The morphology and texture properties of MIL/FSBC magnetic nanoparticles (MNPs) were analyzed using SEM, TEM, XRD, XPS, VSM and BET/BJH. The MIL/FSBC MNPs were employed to extract and enrich the benzophenone (BP-1, BP-3 and BP-12) ultraviolet filters from sludge-amended soil sample using magnetic dispersive solid phase extraction (MDSPE) coupled with microwave assisted extraction (MAE) technique. The important parameters influencing the extraction efficiency of the target analytes were investigated, including the amount of adsorbent, pH, microwave extraction temperature and time, NaCl concentration and desorption conditions. The average relative recoveries of BPs exceeded 90.5% using 20.0 mg of MIL/FSBC for extraction over 20.0 min at 35 °C. The matrix effect ranges from −11.42% to 6.2%, and it is slight at low concentrations. The limits of detection (LODs) and limits of quantification (LOQs) for the calibration curve were in a range of 4.3–14.3 ng/kg and 14.9–47.1 ng/kg, respectively. The monitored stability (79.7–106.3%) in soil samples over 90 days confirmed the environmental persistence of BPs in the soil. The developed method was applied to determine BPs in sludge-amended soil and sediment samples, with acceptable recoveries (84.2–102.6%). The typical chemisorption with a heterogeneous multilayer adsorption mechanism was confirmed using the quasi-secondary kinetic model and the Freundlich adsorption isotherm model. The results confirmed that the proposed method was practicable for the analysis of ultraviolet filters pollutant in actual soil samples.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Zhiqiang Xu,Xiang Wang,Hanlin Zeng,Hanqi Yang,Miao Tao,Wenhao Chen,Lei Zhao,Tongyan Bao,Huanjun Peng,Jingdong Peng
Background Self-crosslinked poly(ionic liquid)s (CPIs), a subset of ionic liquids, are emerging functional polymeric materials with broad applications in catalysis and sensor technology. However, there are scant reports on the use of CPIs as high-performance liquid chromatography (HPLC) stationary phases. Fluorinated materials, noted for their unique physicochemical properties, have recently drawn interest in purification and separation fields. Results In this work, self-crosslinked poly(ionic liquid)s were first employed to prepare a stationary phase (Sil-CPIs) for HPLC, and fluorine functionalization (Sil-CPIs-F) was achieved with 1H,1H,2H,2H-heptadecafluorodecyl acrylate (PFOEA).The impact of chromatographic conditions on retention demonstrated that both Sil-CPIs and Sil-CPIs-F could operate in a multimodal manner, with various analytes (including nucleobases, organic acids, and sulfonamide drugs) being effectively separated under different modes. Outstanding repeatability (RSD ≤0.67 %) and column efficiency (127,010 plates/m) were attained. Fluorine functionalization enhanced the separation performance of the poly(ionic liquid)s stationary phase, endowing it with superior selectivity and separation efficiency towards phenolic isomers and complex samples. Thermodynamic investigations revealed the differences in the retention mechanisms of Sil-CPIs and Sil-CPIs-F, while the linear solvation energy relationship (LSER) more specifically indicated that fluorine modification intensified dipole-dipole interaction and hydrophobic effect of Sil-CPIs. The column with better performance was used to detect chlorpheniramine maleate in pediatric cold medicine and dehydroacetic acid in 6 food samples (including bread, dessert, pastry, instant noodle seasoning packet, fruit and vegetable juice, and pickled turnip), with recovery rate ranging from 99.4 % to 104.67 %, meeting the detection requirements for actual samples. Significance This study confirms the modifiability of self-crosslinked poly(ionic liquid)s stationary phase with 3D reticulated structures, and demonstrates that the introduction of fluorinated monomer can enhance the comprehensive separation capabilities of Sil-CPIs. The potential application value of Sil-CPIs-F in the analysis of multi-component samples and actual detection has been highlighted.
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PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 3
·1-11
·
IF 2.426
Du Chunhui,Zhang Xinyi,Ma Xumin
In order to obtain the tunable and charged surface of the membranes, polymerized ionic liquid(PIL) block copolymers poly (methyl methacrylate) (PMMA)-b-poly(1-[(2-methacryloyloxy)ethyl]-3-butylimidazoliumbromide) (PMEBIm-Br) with different poly(ionic liquid) brush lengths were synthesized by RAFT polymerization method and used in the fabrication of poly(vinylidene fluoride) blend membranes. Chemistry analysis confirmed the successful copolymerization of P(MMA-b-MEBIm-Br) with different chain lengths of PMEBIm-Br blocks, and the PIL groups was also detected on the surface of the blend membranes, which contributes to the hydrophilic and positively charged surface of the membrane. These properties were further enhanced by the chain length of PMEBIm-Br blocks in the copolymer. The surface wettability of the membranes can be regulated from hydrophilicity to hydrophobicity by anion exchange, and the water flux changes also confirmed these phenomena. In addition, the effects of PMEBIm-Br blocks on the separation properties of the membranes were investigated using two dyes, namely, orange G and rhodamine 6G. Results indicated that the blend membranes with long length of PMEBIm-Br blocks had high rejection and good antifouling property to rhodamine 6G. Furthermore, the adsorption experiment of the blend membranes to the two dyes also indicated that blend membranes with long length of PMEBIm-Br blocks would have good dye adsorption-separation property.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 11
·117504
·
IF 4.386
Aiqin Luo,Yanhui Cai,Miao Liu,Shanshan Tang,Ziyu Zhu,Ruilin Haotian,Bingteng Xie,Yue Yi,Zikai Hao,Axin Liang
A cobalt metal-organic framework (Co MOF)-ionic liquid (IL) nanocomposite comprising the base matrix of the electrode was developed with electropolymerized molecularly imprinted polymer (MIP) consisting of o-phenylenediamine (oPD) to detect carcinoembryonic antigen (CEA), a biomarker of breast cancer. Firstly, Co MOF was synthesized using hydrothermal synthesis, which was used as an electrically conductive skeleton and functionalized with an IL. Then, CEA was employed as a template in the electropolymerization of oPD-imprinted films on the surface of screen-printed carbon electrode (SPCE). Finally, the template protein was removed to form a molecularly imprinted film capable of qualitatively and quantitatively signaling CEA. Under optimized conditions, the sensor for CEA exhibits a wide detection range of 1.0 × 10−4−10 ng·ml−1 (0.32 V vs Ag/AgCl) with a limit of detection (LOD) and limit of quantification (LOQ) of 0.024 pg·ml−1 and 0.082 pg·ml−1, respectively. Besides, other parameters including the selectivity, reproducibility (RSD 2.2%), and recovery rate (92.16%–103.35%) are all satisfactory. The proposed strategy provides a new route for the development of rapid breast cancer diagnostic tools.
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高影响因子
ACS Omega
·
2019
·
IF 2.584
Xiaoyu Lan,Xiaofeng Ma,Lei Wang,Yijun Shi,Qun Gu,Linlin Wu,Xiaoli Gu,Zhenyang Luo
This work prepared a type of diblock copolymer with thermo- and photosensitivity in ionic liquids (ILs). P(N,N-dimethylacrylamide) (compatible with ILs) was prepared as one segment, while butyl acrylate (BA) and 4-phenylazophenylmethacrylate (AzoMA) were copolymerized as another segment P(AzoMA-r-BA) with stimuli responsiveness. The diblock copolymer showed tunable lower critical micellization temperature (LCMT) in two mixed imidazole ionic liquids. The value of LCMT depends on not only the conformation status of the azo group in copolymers but also the azo group content in copolymers and mixed ratio of ionic liquids. Based on this tunable LCMT, photoinduced micellization/demicellization can be achieved near room temperature by alternate irradiation with visible and ultraviolet light, and it is totally reversible.
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PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2017
·Vol. 410
·期 2
·349-359
·
IF 3.431
Sun Ya Kun,Jia Man,Yang Jian,Huang Yan-Ping,Liu Zhao-Sheng,Aisa Haji Akber
A method of preparing molecularly imprinted polymers (MIPs) with Zn(II) as a metallic pivot was adopted to solve the problem of imprinting compound with intramolecular hydrogen bonds by forming stronger coordination binding interaction among the template–functional monomer-Zn 2+ complex. A ternary porogenic system including dimethyl sulfoxide, dimethylformamide, and room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate was employed to fabricate imprinted monolith with high porosity and good flow-through properties, in which chicoric acid (CA), zinc acetate, 4-vinylpyridine (4-VP), and ethylene glycol dimethacrylate (EDMA) was the template, metallic ion, functional monomer, as well as crosslinker, respectively. The influence of polymerization factors including the 4-VP-CA ratio, monomer-crosslinker ratio, template-Zn 2+ ratio on imprinting factors was systematically investigated. When the ratio of 4-VP to CA was 24:1, the greatest IF value (24.81) was achieved on the CA-MIP prepared with zinc acetate. In addition, off-line SPE with the optimal MIPs monolith led to high purity of CA (98.0% ± 0.5%) from extraction of Cichorium intybus L. roots with the recovery of 77.5% ± 2.5% ( n = 6). As a conclusion, the strategy of introducing metal ions as metal pivot to prepare MIPs was a powerful method for the MIPs synthesis to the template molecules with intramolecular hydrogen bonds.
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高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 9
·3497-3504
·
IF 4.58
Zhou Shaoyan,Song Naizhong,Lv Xueju,Jia Qiong
The authors describe a hybrid of magnetic task-specific poly(ionic liquid) containing dual task-specific sites in an approach to both preconcentrate and quantify gold(III), palladium(II) and platinum(IV). The hybrid was obtained by successive alkaline coprecipitation, sol-gel, quaternization, elimination, anion exchange and polymerization. The material was characterized by scanning electron microscopy, transmission electron microscopy, FTIR spectroscopy, thermal gravimetric analysis, X-ray photoelectron spectrometry, X-ray diffractometry, and vibrating sample magnetometry. It was applied as an effective sorbent for magnetic solid-phase extraction of gold(III), palladium(II) and platinum(IV) ions. The effects of sample pH, amount of adsorbent, extraction time, eluent concentration and volume were optimized. Following elution with a thiourea/HCl solution, the ions were quantified by graphite furnace AAS. The calibration plot is linear in the 50 to 350 ng·L −1 gold(III) concentration range, in the 50 to 650 ng·L −1 palladium(II) concentration range, and in the 150 to 2100 ng L −1 platinum(IV), respectively. Other figures of merit for noble metals determination, respective, include (a) detection limits of at 19.7, 22.3 and 107.0 ng·L −1 , (b) enrichment factors of 197, 174 and 168; and (c) reproducibilities (expressed as relative standard deviations) of 2.1%, 1.4% and 1.5%. In our perception, the method excels by its high sensitivity and preconcentration capability. It was successfully applied to the determination of gold(III), palladium(II) and platinum(IV) in certified reference materials and (spiked) real samples.
An adsorbent assembling dual task-specific poly(ionic liquid) onto magnetic nanoparticles was used to preconcentrate noble metals. After experimental optimizations, the resulting magnetic hybrid material was applied to measure the concentration of noble metals in real samples.
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高影响因子
ANALYST
·
2012
·Vol. 137
·期 18
·4235-4240
·
IF 4.23
Xiaoyu Mu,Li Qi,Ying Shen,Haizhi Zhang,Juan Qiao,Huimin Ma
A novel amino acid ionic liquid (AAIL) with L-ornithine (L-Orn) as anion was successfully synthesized, and subsequently applied as an available chiral ligand coordinated with Zn(II) in a chiral ligand exchange capillary electrophoresis (CLE-CE) system for the enantioseparation of dansyl amino acids (Dns-D,L-AAs). The influence of key parameters, such as buffer pH, concentration ratio of Zn(II) to ligand and complex concentration, was investigated in detail. Eleven pairs of Dns-D,L-AAs enantiomers were baseline separated and three pairs were partly separated under the optimum conditions. For exploring its potential application, the quantitative features of this proposed method were studied. Good linearity (r2 = 0.999) and favorable repeatability (RSD ≤ 3.4%) were obtained by using Dns-D,L-Met as the test analyte. Finally, this method was employed to investigate the inhibition efficiency of D-amino acid oxidase (DAAO) inhibitors, which may pave a new way for the high-throughput screening of enzyme inhibitors and relevant drug discovery.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Ming Gao,Yu Liu,Su Ma,Sai Mai,Xuedong Wang,Yanyan Li
Herein, two kinds of quaternary ammonium polymeric ionic liquids (PILs) were prepared and rigorously characterized based on SEM, FT-IR and 1H NMR data. The PIL-based effervescence-enhanced dispersive solid-phase extraction (PILE-d-SPE) method was developed based on effervescent tablets containing PILs as extractants, tartaric acid as acid source, NaHCO3 as alkaline source, and water-soluble starch as filler. The positive charges on the surface of PILs and the negative charges on the surface of sulfonamide antibiotics (SAs) exhibited significant electrostatic attraction, thereby enhancing interactions between two PILs and SAs. P[VBTHEA]Cl exhibited higher extraction efficiency for five SAs than P[VBTEA]Cl, possibly because the structure of P[VBTHEA]Cl contained more -OH functional groups compared to P[VBTEA]Cl. Before and after extraction, the FT-IR spectra of the two PILs were significantly different from the O-H and C-H stretching-vibration peaks. DFT calculations show that the strong hydrogen bonds formed between P[VBTHEA]Cl and SDM, resulting in the highest binding energy and, consequently, the highest SDM extraction recovery rate. Overall, the H-bonding induction effect was inferred to be the main reason for the superiority of P[VBTHEA]Cl over P[VBTEA]Cl in extraction efficiency. By the one-factor-at-a-time approach, several important variables were optimized for determining SAs in reclaimed waters as follows: 200-mg PILs as extractant, 400-µL acetone as elution solvent, and 5-min elution. By integration with HPLC-DAD detection, this approach provided satisfactory analytical performance: low detection limit (0.19-0.32 μg/L) and appropriately fortified recovery (78.4-99.7%) for five SAs. Consequently, the P[VBTHEA]Cl-based E-d-SPE method presents environmental friendliness, time-saving, easy operation, and excellent analytical performance.
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高影响因子
危险品化学品经营许可证（带存储）