Synthesis and investigation of alkaline energetic coordination polymers based on 1,2,3-triazole-4,5-dicarboxylic acid for green component of pyrotechnics

• Published in: CrystEngComm Vol. 22; no. 22; pp. 3768 - 3776
• Main Authors: Yang, Zhen-Li, Qin, Jian, Yang, Jun-Qing, Sindiskii, V. P, Zhang, Jian-Guo
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 14.06.2020
• Subjects: Alkali metals; Chemical analysis; Chlorine; Coordination compounds; Coordination polymers; Crystallography; Dicarboxylic acids; Energetic materials; Fireworks; Infrared analysis; Mass spectra; Parameters; Pyrotechnics; Single crystals; Thermal stability; Triazoles
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/d0ce00317d

Research on novel energetic coordination polymers (ECPs) has become increasingly important for energetic materials; numerous ECPs have been reported and found to be potential energetic materials. In this study, 1,2,3-triazole-4,5-dicarboxylic acid was synthesized by an innovative synthetic route, and its complexes with alkali metals (Li, Na, K, Rb, Cs) were synthesized and comprehensively characterized by single-crystal X-ray diffraction, elemental analysis, FT-IR and mass spectra. Most of the synthesized complexes exhibit excellent thermostability, with decomposition temperatures ranging from 312 to 334 °C, and they show good experimental densities. Additionally, the non-isothermal kinetic parameters and thermodynamic parameters were calculated for all prepared ECPs. The combustion flames of the five complexes are in a range of characteristic flame colors (from purple-red to blue). At the same time, all the synthesized CPs have remarkable insensitivity toward friction and impact (FS > 360 N, IS > 40 J), which makes them promising component candidates for chlorine-free "green" pyrotechnics. The ligand 1,2,3-triazole-4,5-dicarboxylic acid was incorporated into alkaline metal to form coordination polymers, which displayed specific emission colors in their combustion, making them have potential applications as green agents of pyrotechnic.