Thermal stability of azole-rich energetic compounds: their structure, density, enthalpy of formation and energetic properties

Abstract

Energetic compounds, as a kind of special materials, are widely used in the fields of national defense, aerospace and exploration. Its research and production have received growing attention. Thermal stability...

Insight into the structural and energetic features of substituted triazolofurazans

“…There is no general rule for energetic salts that ammonium ones have to be more thermally stable then hydrazinium ones, 6,8,43,44 but such regularity is observed in the case of fused heterocycles with ring strain [45][46][47] and N-heterocycles containing the N-NO 2 group, 45,[48][49][50][51][52] with the difference in decomposition temperatures being from several degrees to more than 100 °C. Thus, the reduced thermal stability of our hydrazinium salts 2b and 3c compared to the ammonium ones 2a and 3b did not turn out to be something surprising even for the TFNA salt pair 6d and 6b (Table 2).…”

“…2 However, a common situation in this science field is the contradiction between these requirements, for instance, extreme energetic properties are usually achieved at the expense of molecular stability. 3 Thus, solving these problems requires no less ingenuity than solving the sphinx riddle.…”

Optimization of performance and sensitivity: preparation of two Ag(i)-based ECPs by using isomeric ligands

“…“Transformer”-like EMs refer to a kind of EM with the same molecular formula but different structure, which can change the thermal performance (melting point, decomposition temperature), energy performance (detonation pressure, detonation velocity) and safety characteristics (mechanical sensitivity) of energetic compounds to meet the requirements of different application scenarios by changing the crystal form, configuration, skeleton ring, substituent group or substituent position of molecules. 12–15 According to the structural characteristics of energetic compounds, they can be primarily classified into two major categories: flexible “transformer”-like EMs and rigid “transformer”-like EMs. Flexible “transformer”-like EMs can realize the interconversion of crystal configurations of compounds under specific conditions, such as the types of solvents and the acid–base properties of solvents, regulating the performance of EMs.…”