Synthesis and Properties Characterization of Energetic Metal-organic Framework [Ag2 (HOBTT)]„

A new energetic metal-organic framework, [Ag2 (HOBTT)],,, was prepared by solvothermal method using 4, 5-bis (1-hydroxy-tetrazol)-1,2,3-triazole (H3OBTT) as ligand and Ag(T) as metal center. The structure was characterized by Single crystal X-ray diffraction (SXRD), powder X-ray diffraction (PXRD), infrared spectroscopy (IR) and elemental analysis (EA). The thermal stability was studied by differential scanning calorimeter (DSC) and thermogravimetric (TG) analyzer. The non- isothermal kinetic parameters of thermal decomposition were calculated by Kissingens method. The mechanical sensitivities of [Ag2 (HOBTT)]„ were investigated by impact sensitivity meter and friction sensitivity meter. The GGA-PBE functional was used to calculate the detonation heat, and the detonation velocity and detonation pressure were obtained by Kamlet-Jacobs e-quation. The results show that [Ag2 (HOBTT)],, is a three-dimensional solvent-free framework, belonging to the orthorhombic crystal System and Fddd space group with crystal density of 3. 309 g/cm3. The initial thermal decomposition temperature of _Ag2 (HOBTT)]„ is 586.6K, corresponding thermal decomposition kinetic Parameters £a =255. 18k)/mol and ln(A/s~') = 43. 30. Its impact sensitivity is greater than 40J, friction sensitivity is 108N, detonation velocity and detonation pressure are 9. 73 km/s and 56.38GPa, respectively, showing that [Ag2 (HOBTT)]„ is a kind of promising energetic material with good thermal stability,moderate mechanical sensitivity,and excellent detonation Performance. © 2024 China Ordnance Industry Corporation. All rights reserved.