63365-92-4Relevant articles and documents
Conversion of Xylose into Furfural Catalyzed by Bifunctional Acidic Ionic Liquid Immobilized on the Surface of Magnetic Γ-Al2O3
Wu, Chunyan,Yuan, Wenwen,Huang, Yi,Xia, Yongmei,Yang, Huamei,Wang, Haijun,Liu, Xiang
, p. 953 - 963 (2017)
Abstract: A novel heterogeneous catalyst was prepared by immobilizing bifunctional acidic ionic liquid of metal Al substituted (BAIL-Al) onto the surface of magnetic γ-Al2O3, and characterized by FT-IR, TG, XRD, BET, XPS, VSM, SEM and TEM. The catalytic activity of the prepared solid catalyst was investigated for the conversion of xylose to furfural. On the basis, the effects of temperature, time, amount of catalyst and solvent were studied on the yield of furfural. A furfural yield of 67.5% with 97.3% xylose conversion was obtained from xylose using Fe3O4@Al2O3-(BAIL-Al) as the catalyst in DMSO at 140 °C for 3?h. The immobilized catalyst has the features of easily separation and recycling as well as good thermal stability. Thus, the immobilized catalyst can be efficiently and easily recycled at least five times without apparent loss of activity in xylose conversion and furfural yield. Graphical Abstract: A novel heterogeneous catalyst was prepared by immobilized bifunctional acidic ionic liquid (BAIL-Al) onto the surface of magnetic γ-Al2O3, possessing unique physicochemical properties and excellent catalytic activity for xylose transformation have been developed. [Figure not available: see fulltext.]
Carbofunctional Silatrane Possessing Imidazole Moiety: Synthesis, Characterization, and Antibacterial Studies
Singh, Gurjaspreet,Girdhar, Sheenam,Sharma, Raj Pal,Starynowicz, Przemyslaw,Singh, Baljinder
, p. 1732 - 1745 (2014)
1-(3-(1-imidazol-1-yl)propyl)-2,8,9-trioxa-5-aza-1-silabicyclo[3.3.3.0]undecane 3, with imidazole functionality containing transannular N→Si bond (2.13 ?), was synthesized by transetherification reaction of triethanolamine 1 with N-(3-propyltriethoxysilane)imidazole 2. The compound was characterized by elemental analysis, spectroscopic techniques (IR, 1H NMR, 13C NMR, UV-VIS), mass spectrometry, and X-ray diffraction. The thermal stability of silatrane 3 was studied by TGA/DTG/DSC techniques, which is in agreement with the mass spectrometry and X-ray diffraction studies. The structural investigations of 3 were complemented by quantum-chemical studies of the structure. Compound 3 showed slight activity against Escherichia coli and Staphylococcus aureus, while no activity was found against Bacillus subtillus and Vibrio cholera.
Macrocellular Pd@ionic liquid@organo-Si(HIPE) heterogeneous catalysts and their use for Heck coupling reactions
Brun, Nicolas,Hesemann, Peter,Laurent, Guillaume,Sanchez, Clement,Birot, Marc,Deleuze, Herve,Backov, Renal
, p. 157 - 168 (2013)
Supported ionic liquid phases (SILPs) within macrocellular silica-based foams are prepared by a simple impregnation in organic solvents. Thin ionic liquid layers with thicknesses of 6 to 12 nm were obtained. The SILs mobility has been evidenced through NMR solid state spectroscopy. Subsequently, palladium salts are efficiently trapped within the SILPs, while an in situ palladium hydrogenation allowed an efficient reduction and formation of 10 nm diameter palladium metal nanoparticles. These hybrid foams are used as heterogeneous macrocellular catalysts for the Heck coupling reaction of iodobenzene and cyclohexyl acrylate, where palladium leaching appears to be very low. Despite recyclability minimized through the entrapment of detrimental ammonium salts within the macroporous network during the reaction, competitive TONs and TOFs were reached, while separation of the products can be reached at ease, due to the fact that both palladium species and by-products are trapped within the monolithic foams.
Electrochemical properties of PEO/PMMA blend-based polymer electrolytes using imidazolium salt-supported silica as a filler
Lee, Lyungyu,Kim, Ick-Jun,Yang, Sunhye,Kim, Seok
, p. 3279 - 3290 (2013)
In this study, the composite polymer electrolytes (CPEs) were prepared by solution casting technique. The CPEs consisted of PEO/PMMA blend as a host matrix doped with LiClO4. Propylene carbonate (PC) was used as plasticizer and a small amount of imidazolium salt-supported amorphous silica (IS-AS) as a filler was prepared by the sol-gel method. At room temperature, the highest conductivity was obtained for the composition having PEO-PMMA-LiClO4-PC-4wt. % IS-AS with a value of 1.15 × 10 -4 S/cm. In particular, the CPE using the IS-AS filler showed a higher conductivity than any other sample (fumed silica, amorphous silica). Studies of differential scanning calorimetry and scanning electron microscopy indicated that the ionic conductivity increase was due to an expansion in the amorphous phase which enhances the flexibility of polymeric chains and the homogeneous structure of CPEs. It was found that the ionic conductivity and interfacial resistance stability of CPEs was significantly improved by the addition of IS-AS. In other words, the resistance stability and maximum ambient ionic conductivity of CPEs containing IS-AS filler were better than CPEs containing any other filler.
A benevolent direction to environmental suitability: ionic liquid immobilized MoO3nanoparticles used in the efficient visible light-driven photocatalytic degradation of antibiotics
Barbhuiya, Monjur H.,Chakraborty, Debarati,Chowdhury, Avijit,Das, Bishal,Devi, Meghali,Dhar, Siddhartha S.
, p. 12922 - 12930 (2021/08/03)
In this study, we report the synthesis of a novel MoO3-bonded imidazolium sulfonic acid chloride (MoO3-IL) and its application in the photocatalytic degradation of two very highly polluting antibiotics,viz.ciprofloxacin and metronidazole. The photocatalyst has been preparedviaa facile precipitation technique and the morphological, structural, and photocatalytic properties were analyzed by FT-IR, powder XRD, SEM-EDX, TEM, XPS, UV-DRS, and PL studies. Under visible light irradiation, the immobilized functionalized ionic liquid material displayed considerably enriched photocatalytic activity for the degradation of ciprofloxacin and metronidazole. It exhibited a degradation efficiency of 92.07% for ciprofloxacin, while it recorded the complete degradation of metronidazole in 60 minutes with a rate constant of 0.0391 min?1. The synergism of the nano MoO3and ionic liquid, lower band gap, and late recombination of the photoinduced charge carriers are the major factors in its high photocatalytic activity. Furthermore, trapping experiments were conducted to confirm the photoactive radicals involved in the degradation process.
Preparation method for catalytic synthesis 4 and 4 ’ -dichlorophenylsulfone (by machine translation)
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Paragraph 0017-0018, (2020/07/13)
A catalyst, chlorobenzene and thionyl chloride 4 are 4 ’ - subjected to a Fourier reaction under the action of catalyst, chlorobenzene and thionyl chloride are subjected to a Fourier reaction under the action of a catalyst pH value is poured into reaction liquid to obtain '- dichlorodiphenyl sulfoxide, then the reaction solution is cooled down to devitrification and filtered to obtain' - dichlorodiphenyl sulfone 4,4 . 0 - 5 °C 4,4The product has the advantages of simple process, low cost, less impurities, high purity of the obtained product, less than 99.2percent, 2 and 4 ’ isomer content, more than 0.1percent, good economic benefit and suitability for industrial production 90percent. (by machine translation)
