Ionic liquids, as tuneable, highly soluble, non-flammable, non-volatile and reusable extractants, have attracted extensive attention in the extraction of flavonoids from plants. In the present work, novel dual-chain imidazolium-derived ionic liquids were synthesized by a simple and efficient method and characterized (NMR spectroscopy, thermal stability, viscosity, conductivity, and polarity). Then, the imidazolium ionic liquids with different cation were used in the microwave-assisted extraction of flavonoids from Pinus massoniana Lamb. The results showed that the ionic liquid [Bmbim]Br, with a relatively low viscosity, conductivity and π* as well as a relatively large β, offered the best extraction efficiency and selectivity for flavonoids. Subsequently, the parameters of the extraction procedure for flavonoids were optimized as follows: extraction temperature of 80°C, extraction time of 60 min, microwave power of 300 W, solid-liquid ratio of 1:20, and [Bmbim]Br solution concentration of 1.0 mol/L. The extraction yield of total flavonoids was 41.07 mg/g. Finally, a recovery method of the ionic liquid had been demonstrated, and the recovery rate of ionic liquid was 73.14%.

离子液体作为可调节，高度可溶，不可燃，不挥发和可重复使用的提取剂，在从植物中提取类黄酮方面引起了广泛的关注。在本工作中，通过简单有效的方法合成了新颖的双链咪唑鎓离子液体，并进行了表征（NMR光谱，热稳定性，粘度，电导率和极性）。然后，将不同阳离子的咪唑鎓离子液体用于微波辅助提取马尾松中的黄酮类化合物。羊肉。结果表明，离子液体[Bmbim] Br具有相对较低的粘度，电导率和π*以及相对较大的β，为类黄酮提供了最佳的萃取效率和选择性。随后，对黄酮类化合物的提取工艺参数进行了如下优化：提取温度为80℃，萃取时间为60分钟，微波功率为300 W，固液比为1:20，[Bmbim] Br溶液浓度为1.0 mol / L。总黄酮的提取率为41.07 mg / g。最后，对离子液体的回收方法进行了说明，离子液体的回收率为73.14％。