Nitrogen-Rich Energetic Metal-Organic Framework: Synthesis Structure Properties and Thermal Behaviors of Pb(II) Complex Based on NN-Bis(1H-tetrazole-5-yl)-Amine

摘要

The focus of energetic materials is on searching for a high-energy, high-density, insensitive material. Previous investigations have shown that 3D energetic metal–organic frameworks (E-MOFs) have great potential and advantages in this field. A nitrogen-rich E-MOF, Pb(bta)·2H2O [N% = 31.98%, H2bta = N,N-Bis(1H-tetrazole-5-yl)-amine], was prepared through a one-step hydrothermal reaction in this study. Its crystal structure was determined through single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, and elemental analysis. The complex has high heat denotation (16.142 kJ·cm⁻³), high density (3.250 g·cm⁻³), and good thermostability (Tdec = 614.9 K, 5 K·min⁻¹). The detonation pressure and velocity obtained through theoretical calculations were 43.47 GPa and 8.963 km·s⁻¹, respectively. The sensitivity test showed that the complex is an impact-insensitive material (IS > 40 J). The thermal decomposition process and kinetic parameters of the complex were also investigated through thermogravimetry and differential scanning calorimetry. Non-isothermal kinetic parameters were calculated through the methods of Kissinger and Ozawa-Doyle. Results highlighted the nitrogen-rich MOF as a potential energetic material.