Bitetrazole - Copper (Ⅰ / Ⅱ) Synthesis, Characterization And Properties Of Matter

The preparation and application of green, high-energy, insensitive energetic materials are the present hot topic and forefront in the field of energetic materials.Based on the molecular design, a series of energetic coordination compounds were hydro/solvothermally prepared by reactions of basic bistetrazole ligands with green, low-pollution Cu(Ⅱ) ions in the presence of strong chelating coligands. The structures, thermostability and photoluminescent properties of the targets were also discussed. The main research contents and conclusions in this dissertation were summarized as follows:1. Six bistetrazole ligands5,5’-(1,2-phenylene)bis(1H-tetrazole),5,5’-(1,3-phenylene)bis(1H-tetrazole),5,5’-(1,4-phenylene)bis(1H-tetrazole),5,5’-(ethane-1,2-diyl)bis(1H-tetrazole), bis(tetrazol-5-yl)methane and N,N-bis[1(2)H-tetrazol-5-yl]amine monohydrate were synthesized through the ameliorative reference methods and characterized by elemental analysis, IR,1H NMR and X-ray diffraction.2. Fifteen bistetrazole-copper(Ⅰ/Ⅱ) coordination compounds (22%<N%<40%) were prepared based on the above-mentioned six bistetrazole main ligands, Cu2+and the ancillary ligands1,10-phenanthroline and2,2’-bipyridyl under the hydro/solvothermal conditions. The composition and structures of the compounds were determined by elemental analysis, IR and single-crystal X-ray diffraction technique. Structural analyses reveal that the bistetrazole ligands possess flexible and various binding fashions, which could not only coordinate to metal ions with bridging or chelating modes, but also positively participate in forming supramolecule interactions such as hydrogen bonds and π-π stacking as donors, accepters, or π-conjugated systems. Seven new coordination modes of the six bistetrazole ligands involved in these compounds are observed, which enriches the coordination chemistry of tetrazole.3. The thermostability of the fifteen coordination compounds was investigated by TG-DTG experiments. The results indicate that all the compounds show good stability (>200℃), and the compound [Cu4(BTB)2(phen)4]n (8) even could keep stable up to303℃. In addition, the abrupt collapse of the main frameworks indates the characteristic of energetic materials sharply releasing energy.