Preparation and Crystallographic and Energetic Characterization of Energetic‐Ionic Cocrystals Comprising Triazole Derivatives–Oxidizer

Six new energetic‐ionic cocrystals are prepared and their crystal structures are identified as 1,2,4‐triazole (TA)/sodium perchlorate (SP)(TA:SP = 1:1; TA/SPI and 6:5; TA/SPII ), 3‐amino‐1,2,4‐triazole (3ATA)/SP (3ATA:SP = 1:1), 4‐amino‐1,2,4‐triazole (4ATA)/SP nonhydrate (4ATA:SP = 9:6), 4ATA/SP hydrate (4ATA:SP:H 2 O = 2:2:3), and 4ATA/SP methanol solvate (4ATA:SP:methanol = 1:1:1). Sealed cell‐differential scanning calorimetry reveals that TA/SPII melts at 180 °C, whereas TA/SPI decomposes without melting. To evaluate the influence of cocrystallization on the energetic characteristics of the azole and oxidizer couple, TA/SPII , 3ATA/SP , and 4ATA/SP cocrystals, along with mixtures of the respective parent materials, are examined in friction, impact sensitivity, and deflagration tests. TA/SPII and 3ATA/SP show higher friction and impact sensitivities than the mixture of the respective parent materials, whereas 4ATA/SP and the mixture of 4ATA and SP exhibit similar friction sensitivity. However, the cocrystal, 4ATA/SP show lower impact sensitivity than the 4ATA + SP mixture. The deflagration test reveal that the three cocrystals burn faster than the mixture of the parent materials.