Author:
Nguyễn Hóa,Hoang Trung Huu,Nguyen Mau Vuong,Nguyen Xuan Thanh
Abstract
2,2-Dinitroethene-1,1-diamine (FOX-7) is a low-sensitive explosive suitable for various energy-material applications. It can be synthesized based on the nitration and hydrolysis of heterocyclic precursors derived from 2-methylimidazole-4,5-dione (MID) or 2-methylpyrimidine-4,6-diol (MPD). However, more information about its optimal synthesis parameters during production from MPD as a starting material is needed. In this study, Taguchi's experimental design method was used to improve the yield of FOX-7. Verification of the results shows that the optimal synthesis parameters are as follows: the molar ratio of HNO3/MPD is 8, the reaction time is 180 minutes, and the reaction temperature is 15°C; the maximum yield of FOX-7 can reach 79.14%. Furthermore, the synthesized FOX-7 was identified and characterized by nuclear magnetic resonance (NMR) spectroscopy analysis, Fourier transforms infrared spectroscopy (FTIR), Raman spectroscopy analysis, and powder X-ray diffraction (PXRD).
Publisher
Academy of Military Science and Technology
Reference14 articles.
1. [1]. Anniyappan, M., et al., "Review on advanced energetic materials for insensitive munition formulations". Combustion, Explosion, Shock Waves. Vol. 56, pp. 495-519, (2020).
2. [2]. Latypov, N.V., et al., "Synthesis and reactions of 1, 1-diamino-2, 2-dinitroethylene". Tetrahedron. Vol. 54, No. 38, pp. 11525-11536, (1998).
3. [3]. Bemm, U. and H. Östmark, "1, 1-Diamino-2, 2-dinitroethylene: a novel energetic material with infinite layers in two dimensions". Acta Crystallographica Section C: Crystal Structure Communications. Vol. 54, No. 12, pp. 1997-1999, (1998).
4. [4]. Latypov, N., A. Langlet, and U. Wellmar, "Chemical compound suitable for use as an explosive, intermediate and method for preparing the compound", Google Patents, (2001).
5. [5]. Yuan, W.-S., et al., "Raman spectra and vibrational properties of FOX-7 under pressure and temperature: First-principles calculations". Spectrochimica Acta Part A: Molecular Biomolecular Spectroscopy. Vol. 293, pp. 122489, (2023).