Abstract:Based on energetic ligands 3, 5-dinitro-1-H-1, 2, 4-triazole and 3, 4-bis (1H-5-tetrazolyl) furoxan, two solvent-free ener-getic Ag(Ⅰ)-MOFs, [Ag2(2-ntz)2]n(1) and [Ag2(BTOF)]n(2) have been prepared under hydrothermal conditions. Single-crys-tal X-ray analysis reveals that the Ag+ centersin both Ag(Ⅰ)-MOFs are three-coordinated. Compound 1 features a 3D framework (ρ1=2.805 g·cm-3) constructed by 2-ntz- ligands bridging metal ions with a μ3-1, 2, 4 mode. Compound 2 presents a 2D folded layer structure (ρ2=3.101 g·cm-3) formed by BTOF2- ligands linking metal ions with aquinquedentatechelating-bridging coordina-tionmode. TG-DSC curves demonstrate that both compounds 1 and 2 keep stable until 240 ℃, exhibiting high thermal stability. The heats of combustion of 1 and 2 are determined by oxygen-bomb calorimeter, and the corresponding standard molar enthal-pies of formationare determined to be (1375.74±1.27)kJ·mol-1 and (1647.42±1.46)kJ·mol-1, respectively. The detonation and safety performance analyses show that the heat of detonation, detonation velocityand detonationpressureof compounds 1 and 2 are, respectively calculated as 5.55 kJ·g-1 and 3.78 kJ·g-1, 8.97 km·s-1 and 7.69 km·s-1, as well as 44.87 GPa and 34.37 GPa. Both compounds 1 and 2 are insensitive to impact and friction, and are good high energy yet low sensitivity materials.
