Synthesis, Crystal Structure, and Thermal Behavior of 3‐(4‐Aminofurazan‐3‐yl)‐4‐(4‐nitrofurazan‐3‐yl)furazan (ANTF)

Abstract

Abstract The energetic material 3‐(4‐aminofurazan‐3‐yl)‐4‐(4‐nitrofurazan‐3‐yl)furazan (ANTF) with low melting‐point was synthesized by means of an improved oxidation reaction from 3,4‐bis(4′‐aminofurazano‐3′‐yl)furazan. The structure of ANTF was confirmed by 13 C NMR spectroscopy, mass spectrometry, and the crystal structure was determined by X‐ray diffraction. ANTF crystallized in monoclinic system P 2 1 / c , with a crystal density of 1.785 g cm −3 and crystal parameters a =6.6226(9) Å, b =26.294(2) Å, c =6.5394(8) Å, β =119.545(17)°, V =0.9907(2) nm 3 , Z =4, μ =0.157 mm −1 , F (000)=536. The thermal stability and non‐isothermal kinetics of ANTF were studied by differential scanning calorimetry (DSC) with heating rates of 2.5, 5, 10, and 20 K min −1 . The apparent activation energy ( E a ) of ANTF calculated by Kissinger's equation and Ozawa's equation were 115.9 kJ mol −1 and 112.6 kJ mol −1 , respectively, with the pre‐exponential factor ln A =21.7 s −1 . ANTF is a potential candidate for the melt‐cast explosive with good thermal stability and detonation performance.