The development of energetic materials is still facing a huge challenge because the relationship between energy and sensitivity usually contradictory: high always accompanied with low sensitivity. Here, high-energy, low-sensitivity polynitro-functionalized azopyrazole (TNAP) its salts have been synthesized. structural characterization these compounds was analyzed by elemental analysis, 1H 13C NMR spectroscopies, infrared spectroscopy. single-crystal structure K2TNAP, TNAP, 5, 6 obtained...

Structure–performance investigation has become one of those significant trends for energetic materials and crystallography inevitably. Herein, we report two new deriving from a famous thermally stable explosive benzopyridotetraazapentalene, which was first developed by Huynh Hiskey, et al., at Los Alamos National Laboratory. Owing to the incorporation amino groups, these exhibit different amusing physical performance. Understanding their structures, properties, performances, relationship...

In this study, a series of energetic compounds featuring intramolecular hydrogen bonds were demonstrated by the substituted reaction with 5-aminotetrazole. Notably, representative 3 and 6 exhibit high density (1.910 g cm–3 1.905 cm–3) good detonation properties (3: D = 9072 m s–1, P 37.1 GPa, 6: 8861 32.3 GPa). Additionally, combining other advantages such as simple preparation, thermostability (Td 265 °C), insensitivity (IS > 40 J, FS 360 N), compound is an ideal insensitive HEDM candidate.

With the development of synthetic methodology and crystallography energetic materials, regiochemistry is becoming popular vital in design versatile compounds as well thorough research on relationship between structure property. In this study, two regioisomeric bicyclic based pyrazole polynitrobenzene were synthesized simultaneously by a simple route, regioisomers could be purified facile approach. It interesting to note that ratio changed with temperature. From 80 110 °C, proportion compound...

Energetic trinitromethyl bistriazole and its ionic salts, as well an unexpected energetic-zwitterion featuring diazonium moieties, were synthesized <italic>via</italic> intermolecular intramolecular metathesis strategy.

Polymorphism has attracted significant attention in the area of pharmaceutical chemistry and materials chemistry. For energetic materials, polymorphism may affect their physical performances such as energy, sensitivity, thermal stability, etc. 4,4′,5,5′-Tetranitro-1H,1′H-[2,2′-biimidazole]-1,1′-diamine (DATNBI) exhibits high density (d: 1.93 g cm–3), superior detonation performance (D: 9063 m s–1) comprehensive sensitivity (IS: 15 J), suggesting it is a nonsensitive-high-energy material...

In this work, we developed an interface modified by graphene to simultaneously improve the mechanical and frictional properties of carbon/graphene/carbon (C/G/C) composite. Results indicated that C/G/C composite exhibits remarkably improved interfacial bonding mode, static dynamic performance, thermal conductivity, in comparison with those C/C The weight contents carbon fibers, pyrolytic are 31.6, 0.3 68.1 wt %, respectively. matrix was mainly composed rough laminar (RL) pyrocarbon. average...

Fused heterocyclic energetic cation was rarely reported despite the development of has attracted increasing attention in recent years. In this work, a new 1H-imidazo[4,5-d]pyridazine-2,4,7-triamine synthesized one-step reaction, which used as to prepare perchlorate. Interestingly, when synthesis accomplished different conditions, two crystal forms perchlorate α-4 and β-4 were obtained, further confirmed by X-ray single diffraction, powder diffractograms, infrared multinuclear NMR spectra....

Fused cyclic energetic material, a special category of π-conjugate structures containing two or more rings, has been acknowledged as potential energy source high density in recent years. In the present work, new tricyclic, fused skeleton [1,2,5]oxadiazolo[3,4-d][1,2,4]triazolo[4,3-b]pyridazine-3-oxide was designed and synthesized. Two typical compounds, 4-azido-[1,2,5]oxadiazolo[3,4-d][1,2,4]triazolo[4,3-b]pyridazine-3-oxide...

Abstract Heat‐resistant energetic material (HREM) has shown its broad applications in petroleum and natural gas exploration, aerospace vehicle as well solid rocket formulations. Benzopyridotetraazapentalene (BPTAP) ( d : 1.84 g cm −3 , D 7670 m s −1 IS 9 J, T 366 °C) is a heat‐resistant material, which more dense than those of commercial HREM hexanitrosilbene (HNS) 1.74 7612 5 318 °C). However, low solubility most commonly‐used solvents restricted detonators nano‐energetic materials....

Two fused nitrogen-rich energetic compounds 3-nitro-[1,2,4] triazolo [5,1-c] [1,2,4] triazine-4-amine (2) and N-(7-amino-[1,2,4] [1,5-a] [1,3,5] triazine-5-yl)nitramide (4) were prepared by the simple straightforward synthesis from commercially available 3-amino-1,2,4-triazole. The derivatives 5–8 4 to reduce acidity improve detonation performance. All fully characterized elemental, 1H 13C NMR, infrared analysis. molecular structures of 1·3/2H2O, 2, 3·1/2H2O, 4, 5·4/3H2O further determined...

Fused pyrazolotriazine frameworks have been used to develop novel heat-resistant energetic compounds. Diazotization of 3,4-diamino-4-nitropyrazole (1) and 3-anmio-4,5-dinitropyrazole (ADNP) followed by treatment with malononitrile afford compounds 2 3, including fused ring surrounded amino cyano groups, respectively. Compounds 3 were thoroughly characterized multinuclear NMR spectroscopy, infrared elemental analysis. The molecular structures further confirmed single crystal X-ray diffraction...

New energetic fully-substituted polynitrobenzene derivatives were synthesized via the reaction of 1,3,5-trichloro-2,4,6-trinitrobenzene (TCTNB) with 1,2,4-triazole followed by nucleophilic substitution halo groups aqueous ammonia or sodium azide. These compounds charactered 1H NMR, 13C NMR and HRMS. Additionally, structures amino 6, 8 azido derivative 7 further confirmed single crystal X-ray diffraction analysis. Their decomposition temperatures impact sensitivities also determined. The...

Synthetic aperture radar (SAR) radiometric calibration is essential for quantitative application of SAR images. However, using typical calibrators, such as transponders and corner reflectors, quite expensive requires installation various ground equipment. To reduce the cost simplify process, a spaceborne method proposed, power transmission towers (PTTs) calibrators. PTTs are widely employed distributed electricity have persistent scattering characteristics metallic targets, which makes them...