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  • [Wiley数据库][2011]Carbon Dioxide in Ionic Liquid Microemulsions
  • 更新时间:2016-01-21;信息类型:期刊文章
  • In recent years, especially with the development of green chemistry, supercritical CO2 (SC CO2) and ionic liquids (ILs), which are usually regarded as green solvents, have attracted much attention. Up to now, various kinds of microemulsions containing SC CO2 or IL have been prepared. The creation of microemulsions with IL as the continuous phase and CO2 as the dispersed phase is very interesting and has not yet been reported. Herein, we demonstrate the first work for the formation of a CO2-in-IL microemulsion. This novel microemulsion has many advantages. For example, the size of the dispersed CO2 droplet can be tuned by the pressure of CO2; the properties of the continuous phase can also be tuned by the kind of ILs because of the tunable and designable features of ILs. These special properties give CO2-in-IL microemulsion various applications such as in material synthesis, chemical reactions, and extraction.
  • 链接地址:http://www.ionicliquid.org/download/c-articles/2016-01-21/325.html
  • [Wiley数据库][2011] Catalytic Conversion of Carbohydrates into 5-Hydroxymethylfurfural by Germanium(IV) Chloride in Ionic Liquids
  • 更新时间:2016-01-20;信息类型:期刊文章
  • Direct conversion of carbohydrates into 5-hydroxymethylfurfural (HMF) catalyzed by germanium(IV) chloride in ionic liquids has been investigated in search of an efficient and environmentally friendly process. Monosaccharides d-fructose and d-glucose, disaccharides sucrose and maltose, and even the polysaccharide cellulose were successfully converted into HMF with good yields under mild conditions (yield up to 92% in 5 min in the case of fructose). The structure of ionic liquids,catalyst loading, reaction temperature and water content had noticeable effects on this catalytic system. Addition of 5 molecular sieves during the dehydration of glucose resulted in an increase in HMF yield from 38.4% to 48.4%. A mechanism for glucose conversion to HMF catalyzed by germanium(IV) chloride was proposed according to 13C NMR spectra obtained in situ under different conditions using d-glucose-2-13C as the substrate.
  • 链接地址:http://www.ionicliquid.org/download/c-articles/2016-01-20/323.html
  • [Wiley数据库][2008] Sensitive, label-free protein assay using 1-ethyl-3-methylimidazolium tetrafluoroborate-supported microchip electrophoresis with laser-induced fluorescence detection
  • 更新时间:2015-12-27;信息类型:期刊文章
  • Based on the dimer–monomer equilibrium movement of the fluorescent dye Pyronin Y(PY), a rapid, simple, highly sensitive, label-free method for protein detection was developed by microchip electrophoresis with LIF detection. PY formed a nonfluorescent dimer induced by the premicellar aggregation of an anionic surfactant, SDS, however, the fluorescence intensity of the system increased dramatically when proteins such as BSA, bovine hemoglobin, cytochrome c, and trypsin were added to the solution due to the transition of dimer to fluorescent monomer. Furthermore, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF4) instead of PBS was applied as running buffers in microchip electrophoresis. Due to the excellent properties of EMImBF4, not only nonspecific protein adsorption was more efficiently suppressed, but also approximately ten-fold higher fluorescence intensity enhancement was obtained than that using PBS. Under the optimal conditions, detection limits for BSA, bovine hemoglobin, cytochrome c, and trypsin were 1.0*10-6, 2*10-6, 7*10-7, and 5*10-7 mg/mL, respectively. Thus, without covalent modification of the protein, a protein assay method with high sensitivity was achieved on microchips.
  • 链接地址:http://www.ionicliquid.org/download/c-articles/2015-12-27/322.html
  • [Wiley数据库][2009] Successful establishment of MEKC with electrochemiluminescence detection based on one functionalized ionic liquid
  • 更新时间:2015-12-27;信息类型:期刊文章
  • Herein, one water-soluble functionalized ionic liquid, 1-butyl-3-methylimidazolium dodecyl sulfate ([BMIm][C12H25SO4]), was designed and its superiorities either used as supporting electrolytes or as additives for successful establishment of MEKC with electrochemiluminescence (ECL) detection (MEKC-ECL) method were investigated. Compared with the common supporting electrolytes such as phosphate solution, 1-butyl-3-methylimidazolium dodecyl sulfate solution used as running buffers led to greatly enhanced ECL intensities and column efficiencies for negative targets, a little increase for neutral-charge ones while maintained nearly unchanged for positive ones due to the electrostatic forces between the large cation BMIm and the solutes and the hydrophobic interactions resulting from the large anion C12H25SO4. Moreover, resolution efficiency between analytes was significantly improved. As the existence of ionic liquid moiety, BMIm, accelerated the electron transfer at the electrode surface, the poisoning effect of long chain C12H25SO4 on the electrode surface was eliminated and reproducible ECL intensities with relative standard derivation of 1.02% (n=6) were obtained. The proposed novel MEKC-ECL system was again validated by the baseline separated two similar amino acids of proline and hydroxyproline with lower detection limits of 0.5 and 0.8 μM (S/N=3), respectively.
  • 链接地址:http://www.ionicliquid.org/download/c-articles/2015-12-27/321.html
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