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科学通报  2015 

离子液体酸性强度探针

DOI: 10.1360/N972015-00404, PP. 2476-2481

Keywords: 离子液体,酸性强度,探针,红外光谱,13CNMR波谱

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Abstract:

离子液体作为绿色溶剂和催化剂在有机合成和催化反应中具有重要作用.酸性离子液体因同时拥有液体酸高密度的反应活性位和固体酸的不挥发性,近年来受到了广泛的关注.离子液体的酸性强度会影响化学反应的活性和作用位点的选择,测定离子液体的酸性强度对于认识酸催化反应机理、寻找合适的催化剂具有十分重要的指导意义.使用探针分子的分子光谱研究离子液体性质是一种重要的实验方法.本文主要介绍几种离子液体酸性的探针,着重介绍如何利用这些探针来测定离子液体的酸性强度.

References

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[70]  25 Gr?svik J, Hallett J P, To T Q. A quick, simple, robust method to measure the acidity of ionic liquids. Chem Commun, 2014, 50:7258-7261
[71]  26 Yang Y L, Kou Y. Determination of the Lewis acidity of ionic liquids by means of an IR spectroscopic probe. Chem Commun, 2004, (2):226-227
[72]  27 Hammett L P, Deyrup A J. A series of simple basic indicators. I. The acidity functions of mixtures of sulfuric and perchloric acids with water. J Am Chem Soc, 1932, 54: 2721-2739
[73]  28 Ali A, Ali M, Malik N A, et al. Solvatochromic absorbance probe behavior within mixtures of the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide + molecular organic solvents. J Chem Eng Data, 2014, 59: 1755-1765
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[75]  30 Wang Z, Ji P J, Li X, et al. Double-line hammett relationship revealed through precise acidity measurement of benzenethiols in neat ionic media: A typical “ionic liquid effect”? Org Lett, 2014, 16: 5744-5747
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[77]  32 F?rca?iu D, Ghenciu A. Determination of acidity functions and acid strengths by 13C NMR. Prog Nucl Magn Reson Spectrosc,1996, 29:129-168
[78]  33 Bui T L T. Investigations on alkylation of isobutane with 2-butene using highly acidic ionic liquids as catalysts. Lehrstuhl für Chemische Verfahrenstechnik, Universit?t Bayreuth, 2007
[79]  34 Ren H, Zhao G, Zhang S, et al. Triflic acid catalyzed isobutane alkylation with trifluoroethanol as a promoter. Catal Commun, 2012, 18:85-88
[80]  35 Zheng Y Z, Wang N N, Luo J J, et al. Hydrogen-bonding interactions between [BMIM][BF and acetonitrile. Phys Chem Chem Phys,2013, 15: 18055-18064
[81]  36 Zhou Y, Zheng Y Z, Sun H Y, et al. Hydrogen bonding interactions in ethanol and acetonitrile binary system: A near and mid-infrared spectroscopic study. J Mol Struct, 2014, 1069: 251-257
[82]  37 Fumino K, Fossog V, Stange P, et al. Ion pairing in protic ionic liquids probed by far-infrared spectroscopy: Effects of solvent polarity and temperature. ChemPhysChem, 2014, 15: 2604-2609
[83]  38 Wang X H, Tao G H, Wu X M, et al. Investigation of the acidity of ionic liquid by IR spectroscopy (in Chinese). Acta Phys Chim Sin,2005, 21: 528-533 [王晓化, 陶国宏, 吴晓牧, 等. 离子液体酸性的红外光谱探针法研究. 物理化学学报, 2005, 21: 528-

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