A New Method Of Synthesizing Energetic Materials:the Structure Transformation Of Energy Mofs By Single-crystal To Single-crystal

Energy compounds can be widely used in the field of energy materials. It’s necessary to synthesis the energy compound with outstanding properties to design the highly advanced weapon equipments. Therefore, the research and development of energy compounds have been highly focused by all countries in the world.The traditional methods of synthesizing energy compounds approximately includes introducing energy groups into the heterocyclic framework, synthesizing energy salts through metathetical reaction and synthesizing energy co-crystals. However, the present synthesizing methods have several shortages: complex synthesis steps and the produce of by-product, the harsh reaction conditions, the complex purification steps and a few kinds of energy compounds suitable for the reaction of co-corastals. In this paper, we used a new method of single crystal to single crystal transformatiaon to synthesis energy compounds.Further, it can overcome the shortcomings of the traditional methords.A variety of heterocyclic compounds were synthesized in chapter 2, and the structures of these cpmpounds were identifided and characterized by NMR, MS and elemental analysis. These compounds have properties of high nitrogen content, high heat of formation and good thermal stability. Besides, because of theirs longer molecular size, they can be used as the organic ligands to generate the metal-organic frameworks with large pore size.A new synthetic method, single crystal to single crystal(SCSC), is used to synthesis energy compounds in chapter 3. For the first time, the excellent oxygen-rich energetic ion(C(NO2)3-) was introduced into the energetic metal-organic framework by means of ion exchange. By this way, we realized the single crystal thansformation, that is, the transformation of three-dimentional metal organic framework into two-dimentional metal organic framework. Besides, we also discussed the way of the single crystal transformation.The result shows that single crystal transformation was carried out with some bonds breakage and generation in the conditon of maintaining the integrity of original framework. At last, we analyzed the crystal structure of the compound by IR and single crystal X- ray diffraction.The sensitivity and thermal stability of the two-dementional frameworks were testedin chapter 4. And we discussed the effect of the crystal transformation on the stability and energy property of C(NO2)3- and the product. Additionally the heat of detonation, the detonation pressure, and the detonation velocity were estimated with the code DMO13,Kamlet-Jacobs fomula and so on.In summary, the present study provides a new method to synthesis energy compounds.