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      Namboodiri等采用超声波作为能量源,在密闭体系非溶剂条件下合成离子液体。他们发现卤代物与甲基咪唑的反应活性不同:I>Br>C1。溴和碘的卤代物在室温下0.5~2 h即可完成反应,收率都高于90%,氯化物反应则需要加热和较长时间的超声波作用。Leveque等利用超声波能减小液体中悬浮粒子的尺寸,提高异相反应速率的特点,研究了[bmim]C1与NH4BF4,NH4CF3SO3,NH4PF6等盐的离子交换反应。磁力搅拌一般需要5~8 h,而超声波作用只需1 h,大大减少了反应时间。卢泽相等在分析咪唑类离子液体的制备反应机理和合成实验的基础上,采用微波辐射的方法以N一甲基咪唑为原料,合成了氯化1-丁基-3-甲基咪唑离子液体(1-butyl-3-methylimidazole chloride)。

[ Last edited by lirenxing on 2008-12-26 at 08:57 ]

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bronzezt

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Namboodir, etc. synthesize ionic  liquids on closed non-solution conditions  using ultrasonic as energy source. They find the reactivities of halogen compounds with methyl imidazole are different: I>Br>Cl. Bromine and iodine substituted  compounds finidsh the reactions at room temperature for about 0.5~2 hrs and the yields are more than 90%. Otherwise chloride substituted compounds need more time and heat with ultrasonic. Leveque, etc. use ultrasonic which can reduce the size of suspended particles in solution and  increase the rate of heterogeneous reaction to study ion-exchange reactions of [bmim]C1 and  NH4BF4,NH4CF3SO3,NH4PF6 and so on. It takes 5~8 hrs for magnetic stirring but 1hrs for ultrasonic. Luze Xiang, etc.  synthesize 1-butyl-3-methylimidazole chloride ionic solution N-methyl imidazole as materials with microwave radiation baesd on prepared reactive mechanism and snthetic experiments of imisazole analogues.
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