共查询到19条相似文献,搜索用时 125 毫秒
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新型室温离子液体六烷基胍盐的制备及性质 总被引:3,自引:0,他引:3
近年来 ,离子液体 (IL)作为“绿色”溶剂受到学术和工业界的关注 .英国 BP公司和法国的 IFP等研究机构从 2 0世纪 80年代起就开始探索离子液体作为溶剂与催化剂的可能性 ,至今在离子液体体系中已实现了许多催化反应 [1~ 5] .室温离子液体 (RTIL S)是指在常温下呈液态的熔盐体系 .通常由烷基吡啶或双烷基咪唑季铵阳离子与氯铝酸根、氟硼酸根及氟磷酸根等阴离子组成 .在季铵盐类离子液体中 ,咪唑盐的合成和应用研究尤为突出 .目前 ,对于既可作为溶剂又可作为催化剂的室温离子液体的合成和应用已成为研究热点 [6 ] ,如室温离子液体 [EMI… 相似文献
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近年来人们对离子液体的兴趣不断增长。室温离子液体是一类熔点在室温附近的熔融盐,以其显著的特性在电化学、有机合成、催化、分离等领域被广泛应用。离子液体与氟化学紧密相关,离子液体中含有多种氟阴离子的烷基铵盐、咪唑盐等的合成、性质以及应用已经得到研究。离子液体的阴阳离子中氟原子数量和位置的不同,使离子液体具有不同的性质,如耐水性、耐温性、粘度、密度、表面张力、液体范围、导电性等。含氟的离子液体是离子液体的主要品种,它们凭借良好的可设计性和绿色环保的特点在当今化工工程的绿色化进程中显示出巨大的潜力和广阔的应用前景。 相似文献
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通过量子力学与分子动力学对胍盐离子液体的模拟表明,胍阳离子与氯负离子之间存在较强的相互作用,其相互作用能约为-109.216kcal/m01.从能量与几何分布可见,两种空间分布方式中最稳定构象为Middle作用模式.径向分布函数也验证了这一结论.C02含量的不断增加并没有对离子液体的结构产生影响,而是被离子液体的空腔捕获. 相似文献
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CAO Jun-gang CAO Hui-min LIN Ying-jie LIANG Da-peng DUAN Hai-feng HAN Song-yang ZHAO Xue-zhong 《高等学校化学研究》2011,27(5):780-783
Lewis acidic guanidinium ionic liquid(LAGIL) 2c was used as a novel, efficient and recyclable catalyst for aminolysis of epoxides under solvent-free and room temperature conditions, giving the corresponding β-amino alcohols with moderate to excellent regioselectivity(up to 91:9) in high yields(up to 97%). In addition, LAGIL 2c was recycled three times without any loss of catalytic activity and selectivity to the product. 相似文献
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The nucleophilic displacement reaction of n-bromooctane and potassium iodide in ionic liquid based on cyclic guanidinium cation(2) was investigated. The kinetic reasuh shows that the rate of the reaction is enhanced in ionic liquid (2). The same reaction in [bmim][PF6] (1)(where bmim=1-butyl-3-methylimidazolium) was also studied. It was found that as a reaction medium ionic liquid (2) is better than (1) for nucelophilic displacement reactions. 相似文献
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《Journal of heterocyclic chemistry》2017,54(1):51-54
Synthesis of carbonyl diimidazole type of ionic liquids via silica supported and conventional methodologies under muffle furnace and refluxing condition, respectively, to give shorter reaction time and higher yield. We have studied the catalytic activities of our synthesized ionic liquids for polymerization reactions. 相似文献
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ZHENG Ren-feng WU Mao-cheng DUAN Hai-feng ZHANG Yu WEI Xiao LUO Xu-yang LIN Ying-jie College of Chemistry Jilin University Changchun P.R.China 《高等学校化学研究》2009,25(1)
A series of guanidinium ionic liquids(GILs) was designed, synthesized, and used as electrolytes for dye-sensitized solar celIs(DSSCs). The effect of electrolytes containing GILs on the photovoltaic performance of DSSCs was investigated. It is demonstrated that these GILs are promising for being used as electrolytes for DSSCs and a conversion efficiency of 4.1% can be obtained under AM 1.5 sun light irradiation. 相似文献
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The catalytic characteristics of horse liver alcohol dehydrogenase (HLADH) in the systems involving ionic liquids (ILs) (BMIm·Cl, BMIm·Br, BMIm·PF6, BMIm·BF4 BMIm·OTf and EMIm·Cl) were examined. HLADH displayed higher oxidation activity towards ethanol in the systems containing BMIm·Cl, BMIm·Br, EMIm·Cl or BMIm·PF6 with proper content than that in the IL-free buffer. An excessive amount of these ILs in the reaction systems resulted in an obvious decline in enzymatic activity. BMIm·BF4 and BMIm·OTf of any content investigated could considerably inhibit the enzyme. The anions of ILs showed significant effect on the activity, kinetic parameters and activation energy of HLADH-mediated ethanol oxidation. Additionally, BMIm·Cl, BMIm·Br, EMIm·Cl and BMIm·PF6 boosted markedly the thermostability of HLADH, while the enzyme was less thermostable in BMIm·BF4 or BMIm·OTf-containing systems. The associated conformational changes in HLADH caused by ILs were examined by UV technique. 相似文献