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Abstract
Three energetic ion salts of 3,6-bis[(1H-1,2,3,4-tetrazol-5-yl)-amino]-1,2,4,5-tetrazine(BTATz), namely, methylamine salt(compound 1), ethylenediamine salt(compound 2), and diethylamine salt(compound 3), were synthesized and characterized by elemental analysis, Fourier transform infrared spectrometry, 1H NMR spectroscopy, and 13C NMR spectroscopy. The crystal structure of compound 1 was determined by single-crystal X-ray crystallography, and structural analysis revealed that it belonged to the monoclinic system with P21 /c space group. In addition, the thermal behavior of the three compounds was studied by differential scanning calorimetry and thermogravimetry techniques. The thermal decomposition peak temperatures of the compounds were 574.89, 545.60, and 606.72 K, indicating that the three ion salts exhibited good thermal stability. The kinetic mechanism equations of the main decomposition process and the entropy of activation(ΔS ≠), enthalpy of activation(ΔH ≠), and Gibbs free energy of activation(ΔG ≠) of the three compounds were also obtained. Moreover, the thermal safety of the compounds was evaluated by the values of the self-accelerated decomposition temperature(T SADT), thermal ignition temperature(T TIT), and critical temperature of thermal explosion(T b). The results showed that all the compounds demonstrated good thermal safety, and the thermal safety of compound 3 was better than that of the others.
Keywords
3,6-Bis[(1H-1,2,3,4-tetrazol-5-yl)-amino]-1,2,4,5-tetrazine
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Ionic salt
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Thermal behavior
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Thermal safety
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Jie Zhou, Shaojie Wu, Wenhui Zhang, Qing Liu, Bin Yang, Yinghui Ren, Haixia Ma, Fengqi Zhao, Rongzu Hu.
Synthesis and Thermal Properties of Three Energetic Ion Salts of 3,6-Bis[(1H-1,2,3,4-tetrazol-5-yl)-amino]-1,2,4,5-Tetrazine.
Chemical Research in Chinese Universities, 2019, 35(3): 403-409 DOI:10.1007/s40242-019-8326-z
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