Syntheses, Structures And Properties Of Transition Metal Compounds With Triazole Derivatives As Ligands

Burning rate modifier is the critical function material in the double base propellants. Conventional double base propellants often utilize lead-based compounds as component of burning rate modifiers, which are hazardous to environment and the energy is limited. Many attentions were paid to find eco-friendly and energetic burning rate modifiers. The metal complexes with 1, 2, 4-triazole derivatives because of high nitrogen composition, high enthalpy of formation and high densities can be used as a new generation of burning rate modifiers.In this work, 13 new coordination compounds were synthesized using ligands 1, 2, 4-triazole-5-one and 3-amido-1, 2, 4-triazole and were characterized by elemental analysis, IR spectrum, DSC and TG-DTG techniques. Nine single crystals among the 13 coordination compounds were prepared and characterized by X-ray single crystal diffraction. The X-ray structure analysis revealed that the 1, 2, 4-triazole-5-one is a monodentate or didentate ligand in its coordination compounds, and the 3-amido-1, 2, 4-triazole is a monodentate ligand in its coordination compounds.Ammonium perchlorate (AP) is the most common oxidizer and energetic composition in double based propellants. Its thermal decomposition characteristics influence the combustion behavior of the propellant significantly. In this work, the energetic coordination compounds that we prepared were added to AP in order to evaluate their effect on the thermolysis of AP. This study revealed that the decomposition temperatures (T_onset) of the mixtures shift to lower temperature and the energy of most mixtures are much greater than AP itself.