am9b17384_si_006.cif (248.23 kB)
Synthesis of Thermally Stable and Insensitive Energetic Materials by Incorporating the Tetrazole Functionality into a Fused-Ring 3,6-Dinitropyrazolo-[4,3‑c]Pyrazole Framework
dataset
posted on 2019-11-22, 22:43 authored by Honglei Xia, Wenquan Zhang, Yunhe Jin, Siwei Song, Kangcai Wang, Qinghua ZhangA series of fused-ring energetic materials, i.e., 3,6-dinitro-1,4-di(1H-tetrazol-5-yl)-pyrazolo[4,3-c]pyrazole
(DNTPP, compound 2) and its ionic derivatives
(compounds 3–8), were designed and
synthesized in this study. The molecular structures of compounds 2, 3, 6, 7·2H2O, and 8 were confirmed using single-crystal
X-ray diffraction. Their physicochemical and energetic properties,
such as density, thermal stability, heat of formation, sensitivity,
and detonation properties (e.g., detonation velocity and detonation
pressure), were also evaluated. The results indicate that DNTPP and most of its ionic derivatives are extremely thermally stable
and insensitive toward mechanical stimuli. In particular, the thermal
decomposition temperature of compound 3 is up to 329
°C, while compounds 7 and 8 are very
insensitive (impact sensitivity: >20 J; friction sensitivity: >360
N). Compounds 2, 3, and 6 possess
good comprehensive properties, including excellent thermal stability,
remarkable low sensitivities, and favorable detonation performance.
These features show that DNTPP and its ionic derivatives
have considerable promise as thermally stable and insensitive energetic
materials.