Journal of Ionic Liquids最新文献_第6页

Hexavalent chromium removal using chitin microspheres modified by an ionic liquid cation tricaprylmethylammonium chloride (Aliquat 336) 离子液体阳离子三丙基甲基氯化铵修饰甲壳素微球去除六价铬

Journal of Ionic Liquids

Pub Date : 2025-04-17 DOI: 10.1016/j.jil.2025.100151

Salima Benniche , Ounissa Senhadji-Kebiche , Ariana Pintor , Claudia Fontas

A novel sorbent was successfully developed by immobilizing the ionic liquid tricaprylylmethylammonium chloride (Aliquat 336) into chitin, a natural and renewable polysaccharide. The sorbent was comprehensively characterized using SEM, BET, TGA, FTIR and DRX techniques, and its performance was evaluated for the removal of Cr(VI) from aqueous solutions. The effects of key physicochemical parameters—including pH, stirring time, initial Cr(VI) concentration, and sorbent dosage—were systematically investigated. The sorbent demonstrated high selectivity performance and efficiency for Cr(VI) removal, highlighting a maximum adsorption capacity of 35 mg/g, which is 20 times greater than that of native chitin, at an optimum pH of 2. Interference studies with coexisting ions confirmed the robustness of the sorbent to remove Cr(VI) under competitive conditions. Effective desorption was achieved with a 0.1 M NaOH solution, allowing for 80 % metal recovery within 1 hour of contact. Additionally, the sorbent exhibited remarkable stability over five cycles, maintaining its high adsorption capacity without significant loss in performance.

This study underscores the potential of the new sorbent as a sustainable and efficient material for Cr(VI) remediation, combining high adsorption capacity, reusability, and eco-friendly design.

将离子液体三丙基甲基氯化铵（Aliquat 336）固定为天然可再生多糖甲壳素，制备了一种新型吸附剂。采用SEM、BET、TGA、FTIR和DRX等技术对该吸附剂进行了综合表征，并对其去除水溶液中Cr（VI）的性能进行了评价。系统考察了pH、搅拌时间、初始Cr（VI）浓度和吸附剂用量等关键理化参数的影响。在最佳pH为2的条件下，吸附量达到35 mg/g，是天然几丁质吸附量的20倍。与共存离子的干扰研究证实了在竞争条件下吸附剂去除Cr（VI）的稳健性。在0.1 M的NaOH溶液中实现了有效的解吸，在接触1小时内可以回收80%的金属。此外，该吸附剂在5次循环中表现出显著的稳定性，保持了较高的吸附容量而性能没有明显损失。该研究强调了新型吸附剂作为一种可持续和高效的Cr（VI）修复材料的潜力，该材料具有高吸附容量，可重复使用和环保设计。

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引用次数: 0

Ammonium based dicationic ionic liquids: An interaction with CRABP I deciphered with biophysical perspective 铵基定向离子液体：与CRABP的相互作用，从生物物理学的角度解读

Journal of Ionic Liquids

Pub Date : 2025-04-10 DOI: 10.1016/j.jil.2025.100150

Pratyush Ranjan Hota , Devi Prasanna Behera , Harekrushna Sahoo

The present article examined the impact of ammonium-based dicationic ionic liquids (ILs) as co-solvent on the biophysical behaviour of CRABP I protein using various spectroscopic techniques along with molecular docking to support the experimental outcomes. Fluorescence study revealed significant alternations in the microenvironments of aromatic fluorescent amino acid residues. Fluorescence intensity indicated a decline upon increase in concentration of co-solvents, with a red shift. A similar trend also observed with the synchronous study. Stern-Volmer parameters revealed the static quenching behaviour whereas, existence of electrostatic interaction between protein and ILs is revealed from binding study using temperature-dependent fluorescence measurements. Conformational and structural changes of the protein were analysed using Circular Dichroism spectrometer. Molecular docking study supported the spectroscopic outcomes at the molecular level.

本文利用各种光谱技术和分子对接技术研究了氨基指示离子液体（ILs）作为共溶剂对CRABP I蛋白生物物理行为的影响，以支持实验结果。荧光研究显示芳香荧光氨基酸残基的微环境发生了显著变化。荧光强度随共溶剂浓度的增加而下降，并伴有红移。在同步研究中也观察到类似的趋势。斯特恩-沃尔默参数揭示了静态猝灭行为，而通过使用依赖温度的荧光测量，结合研究揭示了蛋白质与ILs之间存在静电相互作用。用圆二色谱仪分析了蛋白质的构象和结构变化。分子对接研究支持了分子水平上的光谱结果。

引用次数: 0

Ionic liquid-assisted approaches in the synthesis of nitrogen-containing heterocycles: A focus on 3- to 6-membered rings 离子液体辅助合成含氮杂环的方法：以3- 6元环为重点

Journal of Ionic Liquids

Pub Date : 2025-03-27 DOI: 10.1016/j.jil.2025.100146

Pravas Maity , Amrit Krishna Mitra

Nitrogen-containing heterocyclic compounds represent one of the most significant groups in traditional organic chemistry. Many pharmaceuticals, designed to replicate the bioactivity of natural compounds, contain these nitrogen-based heterocyclic compounds. Organic chemists have invested substantial effort into creating these compounds, focusing on innovative and efficient synthetic methods. Ionic liquids (ILs) are highly valued in organic synthesis due to their unique characteristics, such as a wide liquid range, superior solvating properties, low vapour pressure, non-flammability, eco-friendliness, and high thermal stability. They also enhance reaction rates and are easily recyclable. Their dual role as both catalysts and reaction media has drawn significant attention from chemists. With about 4000 research papers published annually, ILs continue to be a major focus of scientific exploration, particularly in the synthesis of nitrogen-containing heterocyclic compounds. This review aims to portray the synthesis of nitrogen-containing heterocyclic compounds (3-membered to 6-membered) assisted by ionic liquids.

含氮杂环化合物是传统有机化学中最重要的一类化合物。许多旨在复制天然化合物生物活性的药物都含有这些氮基杂环化合物。有机化学家已经投入了大量的精力来创造这些化合物，专注于创新和有效的合成方法。离子液体因其广泛的液体范围、优异的溶剂化性能、低蒸气压、不易燃、环保和高热稳定性等特点，在有机合成领域受到高度重视。它们还可以提高反应速率，并且易于回收。它们作为催化剂和反应介质的双重作用引起了化学家的极大关注。每年发表的研究论文约有4000篇，il仍然是科学探索的主要焦点，特别是在含氮杂环化合物的合成方面。本文综述了离子液体辅助合成含氮杂环化合物（3- 6元）的研究进展。

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引用次数: 0

Decomposition of ionic liquids with chloride anions: A combined study of the gas-phase dissociation of the isolated cations and pyrolysis of the bulk 离子液体与氯离子的分解：分离阳离子的气相解离和体的热解的综合研究

Journal of Ionic Liquids

Pub Date : 2025-03-27 DOI: 10.1016/j.jil.2025.100149

Taofiq Abdulraheem, Amanda L. Patrick

As the synthesis of diverse ionic liquids (ILs) proliferates and as (proposed) applications increase, there is growing concern about the possibility of finding IL components and degradation products in the environment, possibly as persistent and/or hazardous contaminants. Understanding IL stability and understanding what decomposition products arise when ILs do degrade will help us better understand potential environmental threats. While stability raises concern in terms of persistent environmental pollution, it is also one of the major strengths of ILs toward their many applications. From understanding degradation mechanisms that could be at play during use under extreme conditions to understanding the products that may form during incomplete incineration, a molecular-level understanding of IL thermal transformations is also desirable beyond the environmental concern. Ideally, such a molecular-level understanding could eventually lead to better predictions of thermal stability as a function of structure prior to synthesis and experimental characterization. In this work, the pyrolysis products of nine ILs, each with the chloride anion and various N-heterocyclic cations, were studied by gas chromatography-mass spectrometry and these results were compared to the unimolecular gas-phase dissociation behavior of the respective isolated cations. By comparing these two experimental approaches, differences between unimolecular decomposition pathways and bimolecular decomposition or transformation pathways could be explored. Further, these comparisons shed light on whether gas-phase dissociation of the isolated cation, which is a very straightforward experiment, could be used to provide any insights into bulk pyrolysis pathways. Overall trends, class-based trends, and behaviors specific to only certain species are identified and discussed. This work provides new molecular insights into the pyrolysis of ILs by studying an array of cations, including those with functionalized R-groups, and by integrating results from bulk pyrolysis with those from collision-induced dissociation of the isolated cation.

随着各种离子液体（ILs）合成的激增和（拟议的）应用的增加，人们越来越关注在环境中发现IL成分和降解产物的可能性，可能是持久性和/或有害污染物。了解IL的稳定性和降解时产生的分解产物将有助于我们更好地了解潜在的环境威胁。虽然稳定性引起了人们对持续环境污染的关注，但它也是ILs在许多应用中的主要优势之一。从了解在极端条件下使用过程中可能起作用的降解机制，到了解在不完全焚烧过程中可能形成的产物，对IL热转化的分子水平的了解也超出了环境问题的考虑。理想情况下，这种分子水平的理解最终可以在合成和实验表征之前更好地预测热稳定性作为结构的函数。本研究采用气相色谱-质谱联用技术研究了9种含氯阴离子和各种n -杂环阳离子的il的热解产物，并将这些结果与各自分离阳离子的单分子气相解离行为进行了比较。通过比较这两种实验方法，可以探索单分子分解途径与双分子分解或转化途径的区别。此外，这些比较揭示了分离阳离子的气相解离，这是一个非常简单的实验，是否可以用来提供对散装热解途径的任何见解。总体趋势、基于类的趋势和特定物种的行为被识别和讨论。这项工作通过研究一系列阳离子，包括那些具有功能化r基团的阳离子，并将大量热解的结果与分离阳离子的碰撞诱导解离的结果相结合，为ILs的热解提供了新的分子见解。

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引用次数: 0

Anti-inflammatory and anti-diabetic activity of N1-(4-substitutedbenzyl)/Butyl-2-methyl-4-nitro-3-imidazolium (E)-3-(4-hydroxy-3-methoxyphenyl)acrylates N1-（4-取代苄基）/丁基-2-甲基-4-硝基-3-咪唑(E)-3-（4-羟基-3-甲氧基苯基）丙烯酸酯的抗炎和抗糖尿病活性

Journal of Ionic Liquids

Pub Date : 2025-03-26 DOI: 10.1016/j.jil.2025.100148

Dhurairaj Satheesh , Annamalai Rajendran , Chandrasekran Geetha , Krishnan Parthipan , Ayyandurai Thirunavukkarasu , Karunanithi Suganya

A series of nine N¹-(4-substitutedbenzyl/butyl)-2-methyl-4-nitro-1H-imidazoles (3a-i) and their N¹-(4-substitutedbenzyl)/Butyl-2-methyl-4-nitro-3-imidazolium (E)-3-(4-hydroxy-3-methoxyphenyl)acrylates (IMS-19, 21-27) were screened for their anti-inflammatory and anti-diabetic activity in different concentrations (20, 40, 80, 200 & 400 μg/mL). The Diclofenac sodium and Acarbose were used as standard drugs for anti-inflammatory and anti-diabetic activities respectively. The 4-nitro-1H-imidazoles (3a-i) and their protic imidazolium salts with (E)-3-(4-hydroxy-3-methoxyphenyl)acrylate as an organic anion (IMS-19, 21-27) are showed very good to remarkable anti-inflammatory and good to excellent anti-diabetic activities compared to their corresponding standard drug.

筛选了9个N1-（4-取代苄基/丁基）-2-甲基-4-硝基- 1h -咪唑（3a-i）及其N1-（4-取代苄基）/丁基-2-甲基-4-硝基-3-咪唑(E)-3-（4-羟基-3-甲氧基苯基）丙烯酸酯（ims - 19,21 -27）在不同浓度(20、40、80、200和amp；400μg / mL)。双氯芬酸钠和阿卡波糖分别作为抗炎和抗糖尿病的标准药物。与相应的标准药物相比，以(E)-3-（4-羟基-3-甲氧基苯基）丙烯酸酯为有机阴离子的4-硝基- 1h -咪唑类（3a-i）及其质子咪唑类盐（ims - 19,21 -27）具有很好的抗炎和抗糖尿病活性。

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引用次数: 0

Facile synthesis of tetraaryl phosphonium ionic liquids 四芳基磷离子液体的简易合成

Journal of Ionic Liquids

Pub Date : 2025-03-24 DOI: 10.1016/j.jil.2025.100147

Stephanie C. Jones , Devin J. Schwaibold , Grant Meadows , Brennan Shuler , Richard Sykora , Frank R. Fronczek , James H. Davis Jr , Benjamin F. Wicker

The syntheses of triphenyl-2-pyridylphosphonium salts, [Mopyphos]A, where A^- = BF₄^-, B(C₆H₅)₄^-, (CF₃SO₂)₂N^-, Sac^-, and Ace^-. (Sac^- = saccharinate, Ace^- = acesulfamate) are described. These salts can be synthesized on a multi-gram scale with good yields and have been characterized by NMR, single crystal XRD, and HRMS. Thermal analyses indicate that the bistriflimide (Tf₂N^- = (CF₃SO₂)₂N^-) salts are especially amenable towards high-temperature ionic liquid (IL) applications with decomposition temperatures above 450°C. The synthetic methods described herein can be utilized to generate several phosphonium bistriflimide ILs of the general formula [(C₆H₅)₃P-Ar]Tf₂N, where Ar = N-heteroaryl).

三苯基-2-吡啶基膦盐[Mopyphos]A的合成，其中A- = BF4-， B(C6H5)4-, (CF3SO2)2N-， Sac-和Ace-（Sac- =糖化，Ace- =乙酰氨基磺酸盐）的描述。这些盐可以在多克尺度上合成，收率高，并通过NMR，单晶XRD和HRMS进行了表征。热分析表明，双striflimide （Tf2N- = (CF3SO2)2N-）盐特别适用于分解温度高于450℃的高温离子液体（IL）应用。本文所述的合成方法可用于生成几种通式[(C6H5)3P-Ar]Tf2N（其中Ar = n -杂芳基）的双striflimide磷il。

引用次数: 0

Graphene oxide based [EMIM]Cl ionanofluids in a tube and their heat transfer, and friction factor analyses under high Prandtl numbers: Experimental and ANN predictions 管内基于氧化石墨烯的[EMIM]Cl离子流体及其在高普朗特数下的传热和摩擦因子分析：实验和人工神经网络预测

Journal of Ionic Liquids

Pub Date : 2025-03-19 DOI: 10.1016/j.jil.2025.100144

L. Syam Sundar

In this study, the stable Graphene Oxide (GO) ionanofluids were prepared and investigated the thermophysical properties, heat transfer coefficient, and friction factor experimentally. These ionanofluids were prepared by dispersing the synthesized GO into the ionic liquid of 1-ethyl-3-methylimidazolium chloride [EMIM]Cl in the weight percentages of 0.05 %, 0.1 %, 0.3 % and 0.5 %, respectively. The obtained experimental data of Reynolds number, and weight percentage was used as input parameters, and heat transfer coefficient, Nusselt number, and friction factor was used as output parameters for the Artificial Neural Network- Scaled Conjugate Gradient (ANN-SCG) analysis. The results indicated that, the thermal conductivity is enhanced by 26.39 % at a temperature of 60°C, and the viscosity enhancement of 30.44 % at a temperature of 30°C, and at 0.5 % weight percentage. The results were also indicated that, the Nusselt number, heat transfer coefficient is enhanced by 32.27 %, and 41.96 %, with a friction factor penalty of 14.04 % at 0.5 % weight percentage and at a Reynolds number of 297.4, respectively, over base fluid. The ANN-SCG results are almost predicts high accuracy when compared with the experimental data. The correlation coefficient (R²) of Nusselt number, heat transfer coefficient, and friction factor are 0.9815, 0.9812, and 0.9918, respectively. Using the experimental data, a new Nusselt number and friction factor correlations were proposed.

本研究制备了稳定的氧化石墨烯（GO）离子流体，并对其热物理性质、传热系数和摩擦系数进行了实验研究。将合成的氧化石墨烯分别以0.05%、0.1%、0.3%和0.5%的质量分数分散到1-乙基-3-甲基咪唑氯离子液体[EMIM]Cl中，制备了这些离子流体。以获得的实验数据雷诺数、重量百分比作为输入参数，传热系数、努塞尔数和摩擦系数作为输出参数，进行人工神经网络-尺度共轭梯度（ANN-SCG）分析。结果表明，在温度为60℃时，导热系数提高了26.39%；在温度为30℃时，粘度提高了30.44%；结果还表明，在0.5%的重量百分比和297.4的雷诺数下，基液上的努塞尔数和换热系数分别提高了32.27%和41.96%，摩擦系数损失14.04%。与实验数据相比，ANN-SCG结果具有较高的预测精度。Nusselt数、换热系数和摩擦系数的相关系数R2分别为0.9815、0.9812和0.9918。利用实验数据，提出了一种新的努塞尔数与摩擦因数的关系。

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引用次数: 0

Natural deep eutectic solvents (NADES) derived from choline chloride and indole-3-butyric acid for optimized CO2 utilization through cycloaddition with epichlorohydrin 由氯化胆碱和吲哚-3-丁酸衍生的天然深共晶溶剂（NADES）通过环加成与环氧氯丙烷优化CO2利用

Journal of Ionic Liquids

Pub Date : 2025-03-18 DOI: 10.1016/j.jil.2025.100142

Refilwe Mogale , Yuel W. Abraha , Marietjie Schutte-Smith , Hendrik.G. Visser , Elizabeth Erasmus

The transition to a sustainable chemical industry necessitates the development of environmentally friendly solvents and catalysts. Carbon dioxide utilization reactions offer a promising avenue for reducing greenhouse gas emissions, but their commercialization depends on the availability of green catalysts and solvents. Traditional options often suffer from toxicity, volatility, and flammability, hindering their industrial application. Natural deep eutectic solvents (NADES) present a sustainable alternative. This study explores the potential of NADES derived from choline chloride (ChCl) and indole-3-butyric acid (IBA) as catalysts for the cycloaddition of CO₂ with epichlorohydrin. Nine NADES compositions were prepared and characterized using FTIR, NMR, DSC, and TGA. The [ChCl] : [IBA] (0.8 : 0.2) mixture exhibited the lowest melting point (4.4 °C) and the highest catalytic activity (TOF = 1091 h ¹). Under optimized conditions, the catalyst demonstrated excellent reusability, maintaining its activity over four catalytic cycles.

向可持续化学工业的过渡需要开发环境友好型溶剂和催化剂。二氧化碳利用反应为减少温室气体排放提供了一条很有前途的途径，但其商业化取决于绿色催化剂和溶剂的可用性。传统的选择通常存在毒性、易挥发性和易燃性，阻碍了它们的工业应用。天然深共晶溶剂（NADES）是一种可持续的替代品。本研究探讨了氯化胆碱（ChCl）和吲哚-3-丁酸（IBA）衍生的NADES作为环氧氯丙烷环加成CO2催化剂的潜力。采用FTIR、NMR、DSC和TGA对9种NADES化合物进行了表征。[ChCl]: [IBA]（0.8: 0.2）混合物具有最低熔点（4.4℃）和最高催化活性（TOF = 1091 h¹）。在优化条件下，催化剂表现出良好的可重复使用性，在四个催化循环中保持其活性。

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引用次数: 0

Amino Acid Deep Eutectic Solvents (AADES) in Oil Purification: An Overview of Properties, Applications, and Future Directions 氨基酸深度共晶溶剂（AADES）在油净化中的性能、应用及未来发展方向

Journal of Ionic Liquids

Pub Date : 2025-03-15 DOI: 10.1016/j.jil.2025.100143

Muhamad Iqbal Ishak , Asiah Nusaibah Masri , Azad Anugerah Ali Rasol , Izni Mariah Ibrahim , Hasrinah Hasbullah

Amino Acid Deep Eutectic Solvents (AADES) are emerging as a promising sustainable alternative to conventional organic solvents, particularly in oil purification processes. This review explores the unique properties of AADES, including their environmental benefits, biocompatibility, and high extraction efficiency. Given the limited availability of published studies specifically on AADES for oil purification, this work references research on deep eutectic solvents (DES) containing amino acids, as well as DES with mechanisms that could be applicable to AADES. The article highlights the potential role of AADES in enhancing oil purification techniques, offering a greener and more efficient approach to industrial applications. However, challenges remain, particularly regarding their scalability, long-term stability, and the lack of direct comparative studies with traditional solvents. By integrating insights from existing DES studies, this review underscores the need for further research to optimize AADES formulations for specific contaminants and improve their performance in large-scale applications. Additionally, understanding the mechanisms governing their interactions with biomolecules and oil-based contaminants is crucial for advancing their industrial viability. Addressing these gaps will support the broader adoption of AADES, contributing to more sustainable and effective oil purification processes while promoting environmental conservation efforts.

氨基酸深度共晶溶剂（AADES）正在成为传统有机溶剂的一种有前途的可持续替代品，特别是在石油净化过程中。本文综述了AADES的独特特性，包括其环境效益、生物相容性和高提取效率。鉴于专门针对AADES用于油脂净化的已发表研究有限，本工作参考了含有氨基酸的深度共晶溶剂（DES）的研究，以及适用于AADES的机制DES的研究。文章强调了AADES在提高油净化技术方面的潜在作用，为工业应用提供了一种更环保、更有效的方法。然而，挑战仍然存在，特别是在可扩展性、长期稳定性以及缺乏与传统溶剂的直接比较研究方面。通过整合现有DES研究的见解，本综述强调需要进一步研究以优化特定污染物的AADES配方，并提高其在大规模应用中的性能。此外，了解其与生物分子和油基污染物相互作用的机制对于提高其工业可行性至关重要。解决这些差距将有助于更广泛地采用AADES，促进更可持续、更有效的石油净化工艺，同时促进环境保护工作。

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引用次数: 0

Synthesis and properties of GABA-based ionic liquids and deep eutectic solvents gaba基离子液体及深共晶溶剂的合成与性能研究

Journal of Ionic Liquids

Pub Date : 2025-03-13 DOI: 10.1016/j.jil.2025.100141

Satoshi Kitaoka , Natsuko Shimaike , Yuhei Kubo , Yukino Isshiki , Anju Furukawa , Kaoru Nobuoka

GABA-based ionic liquids (ILs) and deep eutectic solvents (DESs) were synthesized and their properties compared with those of ILs and DESs with similar structures. In ILs, using GABA as the anion, [N₄₄₄₄][GABA], [N₂₂₂₄][GABA] and [N₄₄₄₆][GABA] in combination with ammonium, [C₂mim][GABA] in combination with imidazolium and [Ch][GABA] in combination with the biological substance choline were synthesized. Among the ILs under investigation, [N₂₂₂₄][GABA], [N₄₄₄₆][GABA] and [C₂mim][GABA] were liquid at room temperature. In DESs, GABA was used as the hydrogen bond donor and three GABA-based DESs were prepared by combining [Ch][Cl], [L-Car][Cl], and [DL-Car][Cl] as hydrogen bond acceptors. Among these DESs, [L-Car][Cl] : GABA (1:1) and [DL-Car][Cl] : GABA (1:1) were shown to be liquid at room temperature. Comparing the viscosities of the prepared liquids showed that DESs was significantly higher than ILs. The viscosity increase was suggested to be due to the hydrogen bond acceptors of [L-Car][Cl] : GABA (1:1) and [DL-Car][Cl] : GABA (1:1) having carboxyl groups. The toxicity of GABA-based ILs and DESs was investigated using HeLa cells, which showed that their cytotoxicity was similar to or lower than that of GABA alone in HeLa cells.

合成了基于gaba的离子液体（ILs）和深度共晶溶剂（DESs），并与相似结构的离子液体和深度共晶溶剂进行了性能比较。以GABA为阴离子，合成了[N4444][GABA]、[N2224][GABA]、[N4446][GABA]与铵结合、[C2mim][GABA]与咪唑结合、[Ch][GABA]与生物物质胆碱结合。在所研究的il中，[N2224][GABA]， [N4446][GABA]和[C2mim][GABA]在室温下为液态。在DESs中，以GABA为氢键供体，以[Ch][Cl]、[L-Car][Cl]、[DL-Car][Cl]为氢键受体制备了3种GABA基DESs。其中，[L-Car][Cl]: GABA（1:1）和[DL-Car][Cl]: GABA（1:1）在室温下呈液态。对制备的液体粘度进行比较，发现DESs明显高于ILs。黏度增加的原因是[L-Car][Cl]: GABA（1:1）和[DL-Car][Cl]: GABA（1:1）的氢键受体含有羧基。利用HeLa细胞研究了GABA基il和DESs的毒性，结果表明它们在HeLa细胞中的细胞毒性与单独使用GABA相似或低于单独使用GABA的细胞毒性。

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引用次数: 0