Study of Six Green Insensitive High Energetic Coordination Polymers Based on Alkali/Alkali‐Earth Metals and 4,5‐Bis(tetrazol‐5‐yl)‐2 H‐1,2,3‐triazole

Abstract

Constructing insensitive high-performance energetic coordination polymers (ECPs) with alkali/alkali-earth metal ions and a nitrogen-rich organic backbone has been proved to be a feasible strategy in this work. Six diverse dimensional novel ECPs (compounds 1-6) were successfully synthesized from Na , Cs , Ca , Sr , Ba ions and a nitrogen-rich triheterocyclic 4,5-bis(tetrazol-5-yl)-2 H-1,2,3-triazole (H BTT). All compounds show outstanding stability and low sensitivity, the thermal stability of these ECPs are significantly improved as the structural reinforcement increases from 1D to 3D, in which the decomposition temperature of 3D Ba based compound 6 is as high as 397 °C. Long-term storage experiments show that compounds 5 and 6 are stable enough at high temperature. Moreover, the six compounds hold considerable detonation performances, in which Ca based compound 5 possesses the detonation velocity of 9.12 km s , along with the detonation pressure of 34.51 GPa, exceeding those of most energetic coordination polymers. Burn tests further certify that the six compounds can be versatile pyrotechnics.

Large Pore Isoreticular Strontium-Organic Frameworks: Syntheses, Crystal Structures, and Thermal and Luminescent Properties

“…Metal–organic frameworks have been intensely investigated for the separation and storage of gases, − as heterogeneous catalysts, − and for their magnetism . More recent developments have been to explore excitation–emission properties of MOFs in luminescence-based chemical sensing, − as scintillation materials − and pyrotechnics. , …”

“…7 More recent developments have been to explore excitation−emission properties of MOFs in luminescence-based chemical sensing, 8−10 as scintillation materials 11−13 and pyrotechnics. 14,15 The majority of MOFs have been made using d-block metal ions and, to a lesser extent, rare-earth metal ions. However, sblock metal ions have also recently been attracting more attention in MOF chemistry.…”

Molecular perovskite high-energetic materials

“…Loading more nitro groups and higher structural tension into a single molecule does improve explosive performance, but usually leads to complicated and not cost-effective synthetic procedures. By a trade-off of detonation performance and cost, HMX is regarded as the best military high-energetic explosives nowadays [7], although it is neither the most powerful one nor the cheapest one.Parallel to the intensive studies on molecule engineering on the backbone of nitrogen-rich organic energetic molecules [8,9], the exploration of advanced energetic materials extends to the crystal engineering on their energetic co-crystals [10-13], energetic salts [14][15][16][17][18][19][20], as well as coordination polymers or metal-organic frameworks [21][22][23][24][25][26][27]. The essential strategy is to control the intermolecular packing/linkage of the energetic organic fuel and oxidizer components in crystals by non-covalent interactions to modify/enhance the explosive performance and/or to reduce the sensitivity to a practicable level.…”

Energetic Cocrystal, Ionic Salt, and Coordination Polymer of a Perchlorate Free High Energy Density Oxidizer: Influence of pKa Modulation on Their Formation

“…Cocrystals 6 and 7 are insensitive to impact and friction, which are comparable to those of BTNMBT, while ionic salt 8 and ECP 9 are sensitive to impact. It is surprising that ionic salt 8 has a lower friction sensitivity (FS: 64 N) than that of ECP 9 (FS: 144 N), which is partially explained by their crystal packing and specific coordination environment. − …”