Energetic Gem-dinitro Salts with Improved Thermal Stability by Incorporating with A Fused Building Block

ACS Applied Materials & Interfaces, Год журнала: 2022, Номер 14(33), С. 37975 - 37981

Опубликована: Авг. 11, 2022

Thermal stability is one of the most significant properties for safety energetic materials, finding a stable skeleton with suitable groups always primary test. In this work, an unusual aminohydrazone cyclization strategy was used in synthesis new series gem-dinitro 1,2,4-triazolo[4,3-b][1,2,4,5]-tetrazine compounds desirable thermal (≥197 °C). All were fully characterized by infrared (IR), NMR, differential scanning calorimetry, single crystal X-ray diffraction, and elemental analysis. The decomposition temperature potassium salt 2 288 °C, reaching level HMX. these performances have demonstrated effective innovatively combining geminal dinitro fused rings.

Язык: Английский

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Toward High-Energy and Low-Sensitivity Energetic Materials Based on a Fused [5,5,5,6]-Tetracyclic Backbone

Organic Letters, Год журнала: 2023, Номер 25(19), С. 3487 - 3491

Опубликована: Май 4, 2023

A route for fused [5,5,5,6]-tetracyclic energetic compounds based on the facile cyclization reaction has been explored. Fused compound 4 shows a high measured density (1.924 g cm–3), low sensitivity (IS = 10 J, and FS 144 N), an excellent detonation velocity (9241 m s–1), which are much better than those of RDX. The results indicate that is potential candidate as secondary explosive provide new insight into construction polycyclic heterocycles.

Язык: Английский

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Hydrogen-bonded self-assembly of purine with picric acid: Super heat-resistant and insensitive explosives

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159133 - 159133

Опубликована: Янв. 1, 2025

Язык: Английский

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A Family of Energetic Materials Based on 1,2,4-Oxadiazole and 1,2,5-Oxadiazole Backbones With Low Insensitivity and Good Detonation Performance

Frontiers in Chemistry, Год журнала: 2020, Номер 7

Опубликована: Фев. 20, 2020

Design and synthesis of new compounds with both high detonation performances good safety properties have always been a formidable task in the field energetic materials. By introducing -ONO2, -NHNO2 moieties into 1,2,4-oxadiazole- 1,2,5-oxadiazole-based backbones, family materials, including ammonium 3-nitramino-4-(5-hydroxymethyl-1,2,4-oxadiazol-3-yl)-furazan (4), 3,3'-bis[5-nitroxymethyl-1,2,4-oxadiazol-3-yl]-4,4'-azofuroxan (6), [3-(4-nitroamino-1,2,5-oxadiazol-3-yl)-1,2,4-oxadiazol-5-yl]-methylene nitrate (8) its ionic salts (10-12), were synthesized fully characterized. The physical materials investigated through theoretical calculations experimental determination.The results show that oxadiazole-based exhibit enthalpy formations, extraordinary insensitivities. In particular, hydrazinium salt (11) shows best (11: d =1.821 g cm-3; P = 35.1 GPa, vD 8822 m s-1, IS 40 J, FS > 360 N). ESP Hirshfeld surfaces analysis indicated large number hydrogen bonds as well π-π stacking interacions within molecules might be key reason for their low sensitivities energy-density levels

Язык: Английский

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Efficient Synthesis of a Superior Heat-Resistant Energetic Material Based on Fused Pyrazolotriazine Ring

Crystal Growth & Design, Год журнала: 2021, Номер 21(12), С. 6872 - 6878

Опубликована: Ноя. 17, 2021

Fused-ring energetic materials are considered to be promising materials. However, their practical applications usually hindered due the tedious synthetic routes. In this work, 4-amino-3,8-dinitropyrazolo[5,1-c][1,2,4]triazin-7-ol (4) was easily prepared within three straightforward steps starting from commercially available ethyl cyanoglyoxylate 2-oxime (1). Compound 4 is a heat-resistant explosive, with remarkable thermal stability (decomposition temperature 332 °C) and sensitivity (burst point 380 °C at 5 s). addition, it demonstrates high density (1.88 g cm–3), good detonation velocity (8538 m s–1), low impact friction sensitivities (IS > 40 J; FS 360 N). Optimized conditions for synthesis of have also been investigated, scale 10 could over one-batch reaction using modified path overall yield (46%). The advanced performance scalable production make bright prospect industrial production.

Язык: Английский

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