Chin. J. Org. Chem. ›› 2016, Vol. 36 ›› Issue (5): 1133-1142.DOI: 10.6023/cjoc201511034
刘跃佳, 张晓娟, 宁弘历, 杨海君
Liu Yuejia, Zhang Xiaojuan, Ning Hongli, Yang Haijun
Starting from N-methylimidazole, 1,2-dimethylimidazole and 2-chloroethanol, a series of imidazolium-based energetic ionic liquids were synthesized via quaternization, nitration and metathesis reactions. All the energetic ionic liquids were characterized by ultraviolet visible spectrum (UV-Vis), infrared spectrum (IR), mass spectrometry (MS), nuclear magnetic resonance (NMR) and elemental analysis. The solubility study of these ionic liquids was carried out with commonly used organic solvents, which showed that the energetic ionic liquids dissolved easily in polar solvents. Moreover, the ionic liquids had good thermo-stabilities indicated by thermal gravimetric analysis (TG-DTG) and differential scanning calorimetry (DSC). TG-DTG analyses showed that N-nitrooxyethylimidazolium nitrate decomposed at about 160 ℃ and N-hydroxyethylimida-zolium ionic salts decomposed above 190 ℃. Furthermore, there was an obvious glass transition process for the energetic ionic liquids based on 1-(2-nitrooxyethyl)-3-methylimidazolium and N-hydroxyethylimidazolium during the secondary heating process of DSC, which was the unique property of ionic liquids. Their densities and standard enthalpies of formation and detonation properties were calculated and analyzed.
Liu Yuejia, Zhang Xiaojuan, Ning Hongli, Yang Haijun. Studies on the Synthesis and Properties of E