《Metal-Free Molecular Perovskite High-Energetic Materials》 was written by Shang, Yu; Huang, Rui-Kang; Chen, Shao-Li; He, Chun-Ting; Yu, Zhi-Hong; Ye, Zi-Ming; Zhang, Wei-Xiong; Chen, Xiao-Ming. Quality Control of 1-Methylpiperazine And the article was included in Crystal Growth & Design in 2020. The article conveys some information:
Metal-free energetic materials generally have the advantages of high gas yield and metal-free residue after combustion or explosion, enabling them to be widely used as explosives and propellant components. As part of a series of our investigations on ABX3 mol. perovskite high-energetic materials, here we report five new metal-free members, (H2A)[NH4(ClO4)3], by using different organic cations H2A2+, i.e., 1-hydroxy-1,4-diazabicyclo[2.2.2]octane-1,4-diium for DAP-O4, piperazine-1,4-diium for PAP-4, 1-methyl-piperazine-1,4-diium for PAP-M4, homopiperazine-1,4-diium for PAP-H4, and 1-methyl-1,4-diazabicyclo-[2.2.2]octane-1,4-diium for DAP-M4, resp. Together with the previously reported member, (H2dabco)[NH4(ClO4)3] (DAP-4, H2dabco2+ = 1,4-diazabicyclo[2.2.2]octane-1,4-diium), these six metal-free mol. perovskite high-energetic materials provide nice instances to fine-tune the oxygen balance, crystal d., thermal stability, and detonation performance, by changing the A-site organic cations solely. The d. functional theory (DFT) calculations and the Kamlet-Jacob (K-J) equation suggested that improving the oxygen balance while keeping the spherical shape of the organic cations to match the anionic cage in these metal-free energetic materials facilitates obtaining a better detonation performance, providing an important clue for designing advanced practicable high-energetic materials. It is worth noting that three compounds (PAP-4, PAP-H4, and DAP-O4) are expected to exceed the performances of RDX as both explosive and propellant, in which DAP-O4 has the highest detonation heat (6.21 kJ mol-1), detonation velocity (8.900 km s-1), and detonation pressure (35.7 GPa), as well as a higher specific impulse value (262 s). The oxygen balance, d., thermal stability and detonation performance were fine-tuned by changing A-site organic fuel cations solely in six metal-free mol. perovskite high-energetic materials. In the experiment, the researchers used many compounds, for example, 1-Methylpiperazine(cas: 109-01-3Quality Control of 1-Methylpiperazine)
1-Methylpiperazine(cas: 109-01-3) can be used as mimic template in the preparation of molecularly imprinted microspheres (MIMs). It was also used to prepare the difunctional strong anion-exchange stationary phase from a 1,4-diazacyclohexane derivative..Quality Control of 1-Methylpiperazine
Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics