New synthesis method for urazine and dissolution-crystallization of its Ag(i)-based laser energetic coordination polymers

Abstract

Guided by synthetic chemistry, coordination chemistry and crystallization chemistry, a novel synthesis and crystallization strategy for laser complex energetic materials has been established in this study. In this study, a method with milder reaction conditions was adopted to design the steps and successfully synthesize urazine (H₂ur). At the same time, using H₂ur as the ligand, the “acid-controlled dissolution-crystallization” method was used to successfully prepare the crystalline coordination polymer Ag(H₂ur)NO₃ (5), and its 1D structure was confirmed by X-ray single crystal diffraction. The physicochemical property evaluation revealed that 5 has the best performance: insensitive to light, noncorrosive properties to metal shells, excellent tolerance to moisture, good thermal stability, and insensitive to mechanical stimulation. Theoretical calculations show that the compound has acceptable detonation properties (D = 7.6 km s⁻¹, P = 31.83 GPa). In addition, hot-needle experiments show that 5 has a good DDT effect. More importantly, it has great potential for application in laser energetic materials (τ = 300 ms, E = 800 mJ).