Synthesis, structure and characterization of 1-D polymer {[Sr(CHZ) 2 (ClO 4 )]ClO 4 } n : a new concept for designing primary explosives

• Published in: RSC advances 2016, Vol.6 (52), p.46828-46833
• Main Authors: Mi, Zhenhao, Zhang, Tonglai, Zhang, Jianguo, Zhou, Zun-ning, Yang, Li
• Format: Article
• Language: English
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/C6RA07277A

A novel alkaline-earth metal perchlorate polymer complex {[Sr(CHZ) 2 (ClO 4 )]ClO 4 } n ( 1 , CHZ = carbohydrazide) was synthesized and characterized. The X-ray single crystal diffraction results illustrate that the structure of the title complex belongs to the triclinic system, space group P 1̄. In 1 , every Sr 2+ ion was ennea-coordinated with four CHZ groups and one perchlorate group. Noticeably, CHZ adopted a tridentate coordination mode with different Sr 2+ ions, leading to a multinuclear structure. Therefore, the whole molecule was extended to a super 1-D polymer, and the configuration of Sr 2+ ion was a tricapped trigonal prism of a tetradecahedron. The DSC result shows only one exothermal decomposition with peak temperature at 296.1 °C. The TG–DTG curve demonstrates a 67.8% mass loss from 266 °C to 332 °C. Non-isothermal kinetic and thermodynamic parameters were obtained via Kissinger's method as well as Ozawa's method. The critical temperature of thermal explosion, Δ S , Δ H , and Δ G were calculated as 248.1 °C, 35.61 J K −1 mol −1 , 161.15 kJ mol −1 , 152.42 kJ mol −1 , respectively. Additionally, the sensitivities towards impact and friction were assessed via relevant standard methods.