School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
Int J Mol Sci. 2023 Jun 27;24(13):10711. doi: 10.3390/ijms241310711.
The instability and volatility of iodine is high, however, effective iodine biocidal species can be readily stored in iodinated azoles and then be released upon decomposition or detonation. Iodine azoles with high iodine content and high thermal stability are highly desired. In this work, the strategy of methylene bridging with asymmetric structures of 3,4,5-triiodo-1-H-pyrazole (TIP), 2,4,5-triiodo-1H-imidazol (TIM), and tetraiodo-1H-pyrrole (TIPL) are proposed. Two highly stable fully iodinated methylene-bridged azole compounds 3,4,5-triiodo-1-((2,4,5-triiodo-1H-imidazol-1-yl)methyl)-1H-pyrazole () and 3,4,5-triiodo-1-((tetraiodo-1H-pyrrol-1-yl)methyl)-1H-pyrazole () were obtained with high iodine content and excellent thermal stability (iodine content: 84.27% for compound and 86.48% for compound ; T: : 285 °C, : 260 °C). Furthermore, their composites with high-energy oxidant ammonium perchlorate (AP) were designed. The combustion behavior and thermal decomposition properties of the formulations were tested and evaluated. This work may open a new avenue to develop advanced energetic biocidal materials with well-balanced energetic and biocidal properties and versatile functionality.
碘的不稳定性和挥发性很高，然而，有效碘的杀菌物种可以很容易地储存在碘化唑中，然后在分解或爆炸时释放出来。具有高碘含量和高热稳定性的碘唑是非常需要的。在这项工作中，提出了用具有不对称结构的 3,4,5-三碘-1-H-吡唑（TIP）、2,4,5-三碘-1H-咪唑（TIM）和四碘-1H-吡咯（TIPL）进行亚甲基桥接的策略。两种高稳定性的全碘化亚甲基桥接唑类化合物 3,4,5-三碘-1-((2,4,5-三碘-1H-咪唑-1-基)甲基)-1H-吡唑（）和 3,4,5-三碘-1-((四碘-1H-吡咯-1-基)甲基)-1H-吡唑（）具有高碘含量和优异的热稳定性（化合物中碘含量为 84.27%，化合物中碘含量为 86.48%；T：：285°C，：260°C）。此外，还设计了它们与高能氧化剂高氯酸铵（AP）的复合材料。测试和评估了配方的燃烧行为和热分解特性。这项工作可能为开发具有良好平衡的能量和杀菌性能以及多功能性的先进能量杀菌材料开辟了新途径。
