78644-90-3

Upstream product

• 155438-11-2 4-amino-4'-nitroazofurazan 
• 155438-10-1 4,4'-dinitroazofurazan 
• 1579854-03-7 4,4'-bis(dichloroamino)-3,3'-azofurazan 
• 281668-89-1 4,4-diaminohydrazofurazan 
• 108262-17-5 4,4'-dimethoxyazofurazane 
• 17220-38-1 3,4-diaminofurazan 

Downstream Products

• 1527497-77-3 N-([1,2,4]triazolo[4,3-b][1,2,4,5]tetrazin-6-yl)-4-((4-amino-1,2,5-oxadiazol-3-yl)diazenyl)-furazan-3-amine 

Relevant academic research and scientific papers

Studies on 3,3′-diamino-4,4′-azofurazan (DAAF): Specific heat capacity, enthalpy of formation and detonation properties

The specific heat capacity of 3,3′-diamino-4,4′-azofurazan (DAAF) was determined by a differential scanning calorimetry. In the temperature range of 253–373?K, the specific heat capacity (Cp) versus T relationship can be fitted into a linear equation: Cp (J?g?1?K?1)?=?0.0028T?+?0.26456. The standard molar heat capacity is 215.53?J?mol?1?K?1 at 298.15?K. According to the relationship between the specific heat capacity and thermodynamic functions, enthalpy, entropy, Gibbs free energy increments [HT–H298.15], [ST–S298.15] and [GT–G298.15] of DAAF from 253 to 373?K with temperature interval of 10?K, relative to the standard temperature 298.15?K were calculated. The combustion energy of DAAF was measured by a precise IKA C5000 oxygen-bomb calorimeter to be ΔcU?=??(13188.43?±?32.77) J?g?1. The standard molar enthalpy of combustion at 298.15?K was determined to be ΔcHm θ?=??(2575.68?±?6.42) kJ?mol?1. The standard molar enthalpy of formation was calculated to be ΔfHm θ?=?429.98?±?6.44?kJ?mol?1 in accordance with Hess’s law. The detonation velocity and detonation pressure were calculated as 7.31?km?s?1 and 23.61?GPa using the Kamlet–Jacobs equations according to the experimental enthalpy of formation.

A practical anodic oxidation of aminofurazans to azofurazans:An environmentally friendly route

Nickel oxyhydroxide, NiOOH, anode has been shown to be an effective tool for the oxidation of aminofurazans to azofurazans in ca. 1% aqueous alkali at room temperature. The electrochemical reaction is simple and convenient, eliminating the use of expensiv

Synthesis and properties of novel nitrogen- and oxygen-enriched dicationic 3,4-diaminotriazolium salts as attractive energetic materials

The incorporation of both fuel and oxidizer properties into a single molecule to effectively improve the oxygen balance of energetic compounds has become one of the most acceptable strategies for the design of modern high-energy-density materials (HEDMs). To identify more powerful and less sensitive HEDMs with favorable oxygen balance, novel nitrogen- and oxygen-enriched dicationic 3,4-diaminotriazolium salts were prepared via the quaternization of 3,4-diamino-triazole with 4,4′-bis(nitramino)azofurazan and 4,4′-bis(nitramino)azoxyfurazan, and then fully characterized. These compounds exhibited favorable thermal stabilities with decomposition temperatures up to 216°C, high densities over 1.82 g·cm?3 as well as acceptable sensitivities. In addition, the two-dimensional fingerprint spectra based on Hirshfeld surface analysis were adopted to illustrate structure–property relationships. Based on the combination of experimentally determined densities and heats of formation calculated with Gaussian 03, the energetic properties were determined using the EXPLO5 v6.02 program. The newly synthesized ionic salts displayed excellent detonation properties (Vd, 9115-9220 m·s?1; P, 33.9-35.4 GPa), comparable to those of 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX), thus highlighting their potential in energetic material applications.

Fluorescent probe capable of simultaneously detecting TNT and TNP and preparation method thereof

The invention relates to a preparation method of a TNT and TNP detection probe, and belongs to the field of small molecular fluorescent materials. The preparation method comprises the following steps:reacting 3,4-diamino furazan with sodium bicarbonate, and recrystallizing with DMSO/H2O to prepare 3,3'-diamino-4,4'-azofurazan; reacting the 3,3'-diamino-4,4'-azofurazan with 2-hydroxy-1-naphthaldehyde to prepare a difunctional fluorescent molecular probe; and filtering, washing, drying and weighing the product to obtain a dark red solid product, thereby obtaining the final product. The probe realizes simultaneous rapid selective recognition of TNT and TNP on an ultraviolet channel and a fluorescence channel, especially in the fluorescence channel, after TNT and TNP are added, fluorescence intensity of probe molecules is quenched to different degrees, and red shift of different degrees also occurs in an emission peak, so that the probe is very effective for differentially detecting TNT and TNP.

Synthesis, Characterization and Properties of Ureido-Furazan Derivatives

The reaction of a variety of amino-furazans with chlorosulfonyl isocyanate was carried out to synthesize ureido-furazans. The nitration to nitro-ureido-furazan was successful in the case of 3-nitro-4-nitroureido-furazan and 3,4-dinitroureido-furazan. Furthermore, furazan derivatives linked to a second amino-oxadiazole were synthesized. All compounds were intensively characterized by X-ray diffraction measurements, NMR spectroscopy, vibrational spectroscopy (IR, Raman), BAM sensitivity tests and differential thermal analysis. The energetic properties were calculated using Explo5 6.03.

A study of N-trinitroethyl-substituted aminofurazans: High detonation performance energetic compounds with good oxygen balance

Two energetic N-trinitroethyl-substituted aminofurazans 11 and 12, as well as nitramine 13 (the N-nitration product of 12) were synthesized. All the compounds were well characterized by NMR spectra, IR spectroscopy, elemental analysis, differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). Their structures were further confirmed by X-ray diffraction studies, which show favorable densities (1.82-1.87 g cm-3). Interestingly, they exhibit good thermal stability (Tdec = 159-230 °C), acceptable oxygen balance (-15.31%-0) and high positive heats of formation (268-1259.5 kJ mol-1). In addition, the performance calculations gave detonation pressures and velocities for the furazan derivatives in the range of 35.4-40.8 GPa and 8900-9486 m s-1, respectively. Furthermore, nitramine 13 (nitrate product of 12), having an oxygen balance of zero, exhibits outstanding detonation properties (ΔfHm, 1259.5 kJ mol-1; D, 9486 m s-1; P, 40.8 GPa), which could be used as a high detonation performance energetic material.

Synthesis of 4,4-bis(dichloroamino) and 4,4-bis(chloroamino)-3,3-azo furazans, the first representatives of dichloroamino and chloroaminofurazans

First representatives of dichloroamino- and chloroaminofurazans, viz., 4,4-bis(di- chloroamino)- and 4,4-bis(chloroamino)-3,3-azofurazans, were synthesized by the chlorina- tion of 4,4-diamino-3,3-azofurazan with sodium hypochlorite in the CH2Cl2-H2O mixt

Preparation of 3,3'-diamino-4,4'-azoxyfurazan, 3,3'-4,4'-azofurazan, and pressed articles

A method for preparing essentially pure 3,3′-diamino-4,4′-azoxyfurazan (“DAAF”) that involves reacting an aqueous solution that includes 3,4-diaminofurazan (“DAF”) with OXONE? (i.e. 2KHSO5.KHSO4.K2SO4) in the presence of a chemical buffer or a material that produces a chemical buffer during the reaction between DAF and the OXONE?. The essentially pure product particles can be used without further purification in preparing pressed articles of that consist of essentially pure DAAF. When sodium hypochlorite is used instead of OXONE, the product is 3,3′-diamino-4,4′-azofurazan (“DAAzF”).

Nucleophilic substitution in the furazan series. Reactions of nitrofurazans with ammonia

The reactions of 3-nitro-4-R-furazans with ammonia were studied. The effect of the substituent R on the specific features of the nucleophilic substitution reaction observed was considered. The nitro group attached to the furazan ring can act as both the l

OXIDATION OF 3,4-DIAMINOFURAZAN BY SOME PEROXIDE REAGENTS

3-Amino-4-nitrofurazan, 4,4'-diamino-3,3'-azoxyfurazan, and 4,4'-diamino-3,3'-azofurazan were obtained by the oxidation of 3,4-diaminofurazan with neutral Caro's acid, ammonium persulfate, hydrogen peroxide, and their mixture.The composition of the oxidation products depends on the ratio of the reagents and on the acidity of the medium.