Splicing oxygen-rich multidentate ligands and characteristic metals to construct flame colorants: abundant structures and attractive colors

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 52; no. 17; pp. 5632 - 5641
• Main Authors: Dong, Wen-Shuai, Mei, Hao-Zheng, Yang, Jun-Qing, Cao, Wen-Li, Hu, Yong, Zhang, Jian-Guo
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 02.05.2023
• Subjects: Alkaline earth metals; Base metal; Chemical analysis; Coloring agents; Detonation; Free energy; Heat of combustion; Heat of formation; Infrared spectroscopy; Mathematical analysis; Nitrogen; Oxygen; Pyrotechnics; Single crystals; Spectrum analysis; Splicing
• ISSN: 1477-9226; 1477-9234; 1477-9234
• DOI: 10.1039/d3dt00470h

Tetranitroethane (TNE), an energetic compound with high-nitrogen (N%, 26.7%) and oxygen (O%, 60.9%) content, is deprotonated by alkali and alkaline earth metal bases to form the corresponding metal salts of TNE which are characterized by FT-IR spectroscopy, elemental analysis, and single crystal X-ray diffraction. All the prepared energetic metal salts show excellent thermal stabilities, and the decomposition temperatures of EP-3 , EP-4 , and EP-5 are higher than 250 °C, due to the numerous coordination bonds of the complexes. Furthermore, the energy of formation of the nitrogen-rich salts were calculated utilizing heat of combustion. The detonation performances were calculated with the EXPLO5 software, and the impact and friction sensitivities were determined. EP-7 shows excellent energy performance ( P = 30.0 GPa, V D = 8436 m s −1 ). EP-3 , EP-4 , EP-5 , and EP-8 are more sensitive to mechanical stimulation. These alkali and alkaline earth metal salts of TNE show good monochromaticity by atomic emission spectroscopy (visible light), and may be used as potential flame colorants in pyrotechnics. Tetranitroethane is a potential eco-friendly energetic compound. Its alkali and alkaline earth metal salts show a visible flame color and good thermal stability, which may have good potential application in the field of novel eco-friendly flame.