JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Juantao Zhang,Minjian Kong,Jiangtao Feng,Chengxian Yin,Danping Li,Lei Fan,Qibin Chen,Honglai Liu
A new type of the dimeric imidazolium-type amphiphile, BDBC m IB (m = 1, 4 and 8), was synthesized using the bipyridiyl as the spacer, and its inhibition performance and mechanism for the corrosion of N80 carbon steel in 1.0 mol·L −1 HCl were evaluated using chemical and electrochemical measurements, surface analyses and density functional theory (DFT) calculations. Results show that the inhibition efficiency of BDBC m IBs increases with their concentrations and the length of tail chains. BDBC 8 IB exhibits the best inhibition performance among them and its inhibition efficiency almost exceeds 90% in a wide concentration range from 1.0 × 10 −6 to 5.0 × 10 −4 mol·L −1 mol·L −1 at 25.0 °C, which attains the maximum over 95% at 5.0 × 10 −4 mol·L −1 . Moreover, three BDBC m IBs all display the high inhibition efficiency at 5.0 × 10 −4 mol·L −1 , nearly exceeding 90%, in the temperature range from 25.0 to 55.0 °C. As a mixed-type inhibitor, BDBC m IBs can retard both cathodic hydrogen evolution and anodic metal dissolution processes, since BDBC m IB molecules bear the imidazolium-based heterocycle with the electron-donating ability and the bipyridine with the electron-accepting ability, thereby facilitating the formation of a protective film on the surface of N80 carbon steel via electrostatic interactions, coordinated and back-donating bonds. The adsorption of BDBC m IBs obeys the Langmuir isothermal model. Our finding demonstrates that the introduction of the bipyridiyl at the spacer does favor improving the inhibition efficiency of such dimeric imidazolium-type amphiphiles, and meanwhile, the proper increase in the number of carbon atoms in the substituents on the imidazole rings can also enhance the inhibition efficiency.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhennan Wang,Weizhong Zheng,Bihong Li,Weizhen Sun,Ling Zhao,Weikang Yuan
To solve the serious safety issues such as highly flammable organic electrolyte, this work developed a novel lithium metal battery containing quasi-solid-state electrolyte (QSSE) with ionic liquid (ILs)/Li salt as electrolyte and covalent organic frameworks (COFs) as hosts. The micro-scale structure and dynamics properties of several ILs confined in COFs were investigated in detail using molecular dynamics (MD) simulations. It is found that the distinctly alternate layering structure of cations and anions of ILs from the pore surface to pore center are formed inside COFs due to the strong interaction between cations/anions and pore wall of COFs. The orientational preferences of confined ILs are observed depending on the size of anions. Inside the larger pores of COFs, the bulk-like structure of confined ILs is found, which tends to enlarge the leakage risk of electrolytes, while the smaller pore size of COFs can reduce the diffusion of ILs and further limit the ionic conductivity of electrolytes. The prepared QSSE with the appropriate-size ILs confined in medium pore-size COFs shows a higher ionic conductivity (0.87 mS cm −1 at 30 °C), more efficient inhibition of lithium dendrite (above 2000 h stability) and better battery performance (150.4 mAh g −1 at 0.1C). These findings from both simulations and experiments confirm the potential of COFs for achieving nondendritic lithium growth in lithium metal batteries.
✓ 已验证
DOI
高影响因子
Biomaterials Science
·
2021
·Vol. 10
·期 4
·1041-1052
·
IF 6.843
Yi-Ru Gao,Wen-Xin Zhang,Ya-Nan Wei,You Li,Teng Fei,Yang Shu,Jian-Hua Wang
Antibacterial hydrogel dressings play an important role in wound healing and infection treatment. The majority of hydrogels are obtained through chemical cross-linking and complex synthesis or processing. Copper ions (Cu2+) have been involved in sterilization; however, their direct use may lead to high local concentrations and heavy metal toxic side effects. Herein, dopamine (DA) was polymerized in situ along a polyvinyl alcohol (PVA) chain and chelated copper ions (Cu2+) to form a mixture. Ionic liquid (IL) choline–glycolate (CGLY) was added to the mixture to form an ionic gel. CGLY promotes gel formation through intermolecular hydrogen bonds with the polymer chains and avoids the use of toxic chemical crosslinking agents. Meanwhile, CGLY can also promote the release of Cu2+ and generate hydrogel free radicals (˙OH) in the wound through chemodynamic therapy to kill drug-resistant bacteria. In addition, the excellent transdermal property of CGLY enables the released Cu2+ to stimulate cell migration and accelerate wound healing. The gel exhibits favorable biocompatibility and its use has been demonstrated in skin infection therapy of mice.
✓ 已验证
DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Jiankai Cui,Yimu Bu,Qinglun Che,Lei Liu,Yi Li,Xin Quan,Litian Hu,Songwei Zhang
In this study, a series of sulfur-free and phosphorus-free ionic liquids derived from fatty acids and tertiary ammonium as multifunctional additives for ester oils were synthesized and evaluated to assess the catalytic oxidation inhibition and tribological properties. Notably, all multifunctional ionic liquids effectively suppressed the catalytic effect from ferric ion on the oxidative degradation of bis (2-ethylhexyl) sebacate. Among them, trioctylammonium stearate ([N888H][SA]) demonstrated exceptional performance, extending the oxidation induction period base oil by 2.7 times and significantly reducing friction coefficient and wear scar diameter. This superior phenomenon of the oxidation induction period enhancement was due to a unique synergistic mechanism: the anion potently chelated the ferric ions to inhibit the catalysis, while the tertiary ammonium cation acted as an efficient radical scavenger. Tribological results confirmed the formation of a protective tribofilm by [N888H][SA], preventing the direct contact between the friction pairs. This work establishes a novel and sustainable paradigm for developing next-generation, multifunctional lubricant additives with high performance.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Yongjie Dan,Jinqi Chen,Pengjian Gong,Yanhua Niu,Guangxian Li
In this study, a series of dicationic ionic liquids ([EO n (mim) 2 ][TFSI] 2 ) with two charged imidazolium rings bridged by varying oligo(ethylene oxide) (EO) linker lengths and bis(trifluoromethylsulfonyl)imide as anions were successfully synthesized. The aggregation of [EO n (mim) 2 ][TFSI] 2 and their influence on the dynamic behavior of poly(ethylene oxide) (PEO) chain were systematically investigated by combining simulation and experimental methods. For [EO n (mim) 2 ][TFSI] 2 , there is a transition from unfolded to majority folded state depending on linker length, which could further affect the hydrogen-bonding (H-bonding) types between [EO n (mim) 2 ][TFSI] 2 and PEO. In the PEO/[EO n (mim) 2 ][TFSI] 2 mixtures, the introduction of [EO 1 (mim) 2 ][TFSI] 2 results in unexpectedly higher glass transition temperature ( T g ) and flow activation energy ( E a ) compared to neat PEO. As the linker length increases, both T g and E a exhibit an interesting decreasing trend followed by an increase, which is governed by the co-effects of [EO n (mim) 2 ][TFSI] 2 aggregation, H-bonding, and plasticization. [EO n (mim) 2 ][TFSI] 2 with shorter linker at unfolded state tend to form physical crosslinks among PEO chains through inter -chain H-bonding, causing higher T g and E a , while those with longer EO linker at folded state could more likely form intra -chain H-bonding. Besides, the PEO/[EO n (mim) 2 ][TFSI] 2 with longer EO linker ( n > 3) exhibit higher heterogeneity order parameter (HOP) values, which implies larger [EO n (mim) 2 ][TFSI] 2 cluster and greater heterogeneity contributing to their higher crystallinity.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 9
·4167-4178
·
IF 3.925
Mingyu Cui,Dingkai Wang,Yanjun Li,Wei Zhao,Chong Liang,Xutang Liu,Shuiyuan Fu,Luyao Wang,Xianyong Wei
Lignin, the most abundant renewable resource of aromatics in nature, is recognized as an alternative for fossil-based fuels and chemicals. Herein, we propose an efficient method to obtain aromatic monomers by lignin depolymerization using magnetic silica supported Brønsted acidic ionic liquid (BAIL–Fe3O4@SiO2), which has higher catalytic activity and easier separate property compared with the traditional lignin depolymerization in ionic liquids. The prepared BAIL (30 wt%)–Fe3O4@SiO2 catalyst is magnetic, mesoporous, thermostable, and core–shell structured, with a diameter of 500–600 nm, BET surface area of 185.7 m2 g−1, and pore size of 4.362 nm. The results showed that in the presence of 40 wt% of BAIL (30 wt%)–Fe3O4@SiO2 at 160 °C for 3 h, the conversion of lignin increased markedly to 54.0% and 33.0% yield of aromatic monomers were acquired. Among the ethanol-soluble liquid products from lignin depolymerization over BAIL (30 wt%)–Fe3O4@SiO2, the aryl aldehyde is predominant and has a yield of 19.2%. Furthermore, other products were also detected, for which the molecular mass was less than 250 Da, the double bond equivalent value varied from 4 to 7, and the carbon number was within the range of 6–15. The reusability experiment showed that the conversion of lignin and the yield of aromatic monomers can still achieve 90.4% and 91.2% of that catalyzed by fresh catalyst after the 3rd cycle.
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2017
·Vol. 147
·期 11
·2764-2771
·
IF 2.799
Liu Yang,Mao Guijie,Zhao Hongyan,Song Jinyi,Han Huatao,Li Zhuofei,Chu Wenyi,Sun Zhizhong
Abstract A series of DBU-based (DBU = 1, 8-diazabicyclo [5.4.0] undec-7-ene) dicationic ionic liquids with different anions were successfully synthesized by the reaction of DBU and 1, 6-dichlorohexane. Therein, the dicationic ionic liquid 1, 1′-(hexane-1, 6-diyl)bis(1, 8-diazabicyclo [5.4.0]undec-7-enium) dichlorine ( IL-1 ) was successfully employed as an efficient catalyst in esterification reaction of carboxylic acids with primary chloroalkanes under mild conditions without any additional basic reagents. Moreover, the optimum catalyst could be efficiently reused for five times without any significant change on the catalytic effect. The improved protocol is not only efficient, but also green and pollution-free. Graphical Abstract
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 7
·3525-3536
·
IF 2.961
Lu Jingling,Xu Cunying,Li Jianru,Wang Shuxian,Xiang Qinqin,Chen Xiao,Hua Yixin,Li Yan
The effects of nicotinic acid (NA) on the electrodeposition of Al-Mn alloy have been investigated in aluminum chloride-1-butyl-3-methylimidazolium ionic liquids (AlCl 3 -BMIC) containing 0.15 mol·L −1 MnCl 2 (AlCl 3 -BMIC-MnCl 2 ). The electrochemical behaviors of the AlCl 3 -BMIC-MnCl 2 electrolyte have been studied here using cyclic voltammetry and potentiodynamic polarization. The addition of NA obviously increased the nucleation overpotential of Al-Mn alloy and inhibited the reduction reaction of Al(III) and Mn(II). The resultant surface morphologies, composition, and roughness of the Al-Mn alloy coating were revealed by scanning electron microscopy (SEM), transmission electron microscope (TEM), and atomic force microscopy (AFM). It was found that these additives strongly affect the morphology, composition, roughness, and crystal structure of the Al-Mn alloy coating. With the addition of NA, the content of Mn decreased, and Al-Mn alloy coatings became more uniform and smoother. The crystal structure of Al-Mn coatings was also examined by X-ray diffraction (XRD), where it was found that the phase composition of the deposits depends on the quantities of additives. For electrolyte containing little or no NA additives, the resulting alloy is amorphous structure. With NA additives up to 6·mmol L −1 , the Al-Mn coating changed into a mixture phase of amorphous and crystalline structure.
✓ 已验证
DOI
高影响因子
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2022
·Vol. 95
·期 1
·143-153
·
IF 0.869
Jing Xiaohua,Sun Zhumei,Ren Jie,Chen Jing,Pan Donghui,Chen Yufei
Abstract Novel task-specific ionic liquids of [C 4 H 9 NH 3 ][P507], [C 6 H 13 NH 3 ][P507], [C 8 H 17 NH 3 ][P507], [C 10 H 21 NH 3 ][P507] and [C 12 H 25 NH 3 ][P507] were synthesized by one-step reaction. The 1 H NMR, 13 C NMR, FT-IR and mass spectra (MS) of the novel task-specific ionic liquids s were studied for analysis of their purities. The [C 4 H 9 NH 3 ][P507] has better performance of selective separation of Co 2+ from Ni 2+ in simulated sulfate solution due to the smaller different value between the radius of Co 2+ and the radius of [C 4 H 9 NH 3 ] + . The separation factor of Co 2+ from Ni 2+ was 522 using the three-stage cross flow extraction. A cleaner separation of Co 2+ from simulated solution containing 14 and 25 g/L of Co 2+ and Ni 2+ , respectively, was achieved using this process due to the unique properties of [C 4 H 9 NH 3 ] [P507].
✓ 已验证
DOI
高影响因子
MACROMOLECULES
·
2020
·
IF 5.918
Xi He,Miqiu Kong,Yanhua Niu,Guangxian Li
A series of dicationic ionic liquids (DILs) with two singly charged imidazolium rings linked by different alkyl chain lengths (C4, C6, and C8) were first synthesized. The relaxation and entanglement of poly(methyl methacrylate) (PMMA) chains in both the DILs and conventional monocationic ionic liquids (MILs) with the same anion bis[(trifluoromethyl)sulfonyl]imide ([TFSI]−) were investigated by rheological and dynamic light scattering (DLS) measurements. PMMA in DILs exhibits lower critical entanglement concentration, slower relaxation behavior, and a denser entanglement network than in their MIL counterparts, and these differences become more pronounced as the alkyl chain length decreases. The double imidazolium ring structure that provides interaction sites with PMMA chains plays a dominant role in the relaxation and entanglement of the PMMA/DIL system. As a result, the PMMA/DILs show higher modulus, greater viscosity, and better gel recovery than the PMMA/MILs at the same volume fraction. In addition, a stronger dependence on alkyl chain length is also found in PMMA/DILs. With the increase of alkyl chain length, the relaxation of PMMA becomes faster and the entanglement molecular weight increases gradually, indicating the released mobility of polymer chains. Combined with the results of DLS, it is further confirmed that the greater degree of entanglement in PMMA/DILs mainly comes from the contribution of cohesional entanglement in the system.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Hongling Fang,Yi Li,Songwei Zhang,Qi Ding,Litian Hu,Kuan Lu
Hypothesis Ionic liquids (ILs), as lubricant additives , can greatly improve the lubricating behavior of the frictional interfaces. However, it is urgent to explore ILs with good oil solubility in nonpolar oils, and it is necessary to further study and verify the lubrication mechanism of ILs from the perspective of alkyl chain length. Experiments Five protic ILs (PILs) with varying alkyl chain lengths were synthesized by proton transfer method. As additives in PAO oil, their tribological properties were investigated on SRV-V tester. Through molecular dynamics simulation , the adsorption behavior of PILs at the frictional interface was illustrated. Findings The tribological properties of base oil could be significantly improved by adding PIL additives, but interestingly, PILs with short-chain anions showed better lubricating performance, which contradicted most of the early findings. Further analyses revealed that PILs achieved effective lubrication by the tribochemical interaction between anions and frictional interface, and the formation of cationic protective layer. However, PILs with shorter-chain anions form a denser protective layer that can better support the interfacial anions to participate in tribochemical reactions and thus abnormally exhibit superior lubricating performance than those with longer-chain anions.
✓ 已验证
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Wei Zhang,Min Zhang,Jifei Song,Yifei Zhang,Binbin Nian,Yi Hu
To fulfill the requirements of environmental protection, a magnetically recoverable immobilized laccase has been developed for water pollutant treatment. In order to accomplish this objective, we propose a polydopamine-coated magnetic graphene material that addresses the challenges associated with accumulation caused by electrostatic interactions between graphene and enzyme molecules, which can lead to protein denaturation and inactivation. To achieve this, we present a polydopamine-coated magnetic graphene material that binds to the enzyme molecule through flexible spacer arms formed by ionic liquids . The immobilized laccase exhibited a good protective effect on laccase and showed a high stability and recycling ability. Laccase-ILs-PDA-MGO has a wider pH and temperature range and retains about 80% of its initial activity even after incubation at 50 °C for 2 h, which is 2.2 times more active than free laccase. Furthermore, the laccase-ILs-PDA-MGO exhibited a remarkable removal efficiency of 97.0% and 83.9% toward 2,4-DCP and BPA within 12 h at room temperature. More importantly, laccase-ILs-PDA-MGO can be recovered from the effluent and used multiple times for organic pollutant removal, while maintaining a relative removal efficiency of 80.6% for 2,4-DCP and 81.4% for BPA after undergoing seven cycles. In this study, a strategy for laccase immobilization by utilizing ILs spacer arms to modify GO aims to provide valuable insights into the advancement of efficient enzyme immobilization techniques and the practical application of immobilized enzymes in wastewater treatment .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）