Azide-Based High-Energy Metal–Organic Frameworks with Enhanced Thermal Stability

We describe the structure
and properties of [Zn­(C6H4N5)­N3]n,
a new nonporous three-dimensional high-energy metal–organic
framework (HE-MOF) with enhanced thermal stability. The compound is
synthesized by the hydrothermal method with in situ ligand formation
under controlled pH and characterized using single-crystal X-ray diffraction,
elemental analysis, and Fourier transform infrared. The measured detonation
temperature (Tdet = 345 °C) and heat
of detonation (ΔHdet = −0.380
kcal/g) compare well with commercial explosives and other nitrogen-rich
HE-MOFs. The velocity and pressure of denotation are 5.96 km/s and
9.56 GPa, respectively. Differential scanning calorimetry analysis
shows that the denotation of [Zn­(C6H4N5)­N3]n occurs via a complex
temperature-dependent mechanism.