Synergistic Catalytic Effect of a Series of Energetic Coordination Compounds based on Tetrazole‐1‐acetic Acid on Thermal Decomposition of HMX

Abstract

A series of energetic coordination compounds [Co(tza) 2 } n (1), [Bi(tza) 3 ] n (2), {[Cu 4 (tza) 6 (OH) 2 ]·4H 2 O} n (3), [Mn(tza) 2 ] n (4), {[Bi(tza)(C 2 O 4 )(H 2 O)]·H 2 O} n (5) and [Fe 3 O(tza) 6 (H 2 O) 3 ]NO 3 (6) based on tetrazole-1-acetic acid (Htza) were synthesized though environmentally friendly methods. The coordination compounds were characterized by elemental analyses, IR spectroscopy, single-crystal and powder X-ray diffraction (PXRD), thermogravimetric analyses (TG), and differential scanning calorimetry (DSC). Their catalytic performances and the synergetic catalytic effects between 1 and 2, 3 and 4, 5 and 6 on the thermal decomposition of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) were all investigated by DSC. The results revealed that compounds 1-6 are thermally stable energetic compounds and they all exhibit high catalytic action for HMX thermal * Dr. Z.-X. Wei E-Mail: zx_wei@126.com [a] 742 decomposition. The catalytic effects of the compounds on HMX thermal decomposition are closely related to the oxides, which come from the decomposition of the compounds, but have no positive relationships with the heat releases of the compounds themselves. Moreover, the synergetic catalytic effects between 1 and 2, 3 and 4, 5 and 6 were observed. Their mixtures at different mass ratio have different synergetic catalytic effects, and the sequence of the biggest synergetic index (SI) in each system is copper-manganese system (compounds 3 and 4) Ͼ iron-bismuth system (compounds 5 and 6) Ͼ cobalt-bismuth system (compounds 1 and 2), indicating that the synergistic catalytic effects are mainly related to the combination and the proportion of the compounds.

Research progress of EMOFs-based burning rate catalysts for solid propellants

“…It was worth mentioning that if the Fe and Bi complexes are mixed at a molar ratio of 1:2, the effect is more significant than that of the single catalyst. In 2017, K. Li et al (Qu et al, 2017) continued to use tetrazolium acetate as the ligand, and synthesized…”

“…It was worth mentioning that if the Fe and Bi complexes are mixed at a molar ratio of 1:2, the effect is more significant than that of the single catalyst. In 2017, K. Li et al ( Qu et al, 2017 ) continued to use tetrazolium acetate as the ligand, and synthesized [Co(tza) 2 ] n ,{[Cu 4 (tza) 6 (OH) 2 ·H 2 O} n [Mn (tza) 2 ] n and {[Bi(tza) (C 2 O 4 ) (H 2 O)]·H 2 O} They then studied their influence on the thermal decomposition of HMX. Experiments showed that the synthesized complexes had obvious catalytic effect on HMX, and the Cu complex had the best catalytic effect, indicating that the catalytic effect was closely related to the oxides produced by thermal decomposition.…”