八核铁簇化合物的制备、表征及其对高氯酸铵的热分解催化  

Preparation and Characteriztion of an Octanuclear Iron(Ⅲ)Cluster and its Catalytic Performance for the Thermal Decomposition of Ammonium Perchlorate

作　　者：黄琪 刘丽 金波[1] 彭汝芳 HUANG Qi;LIU Li;JIN Bo;PENG Ru-fang(State Key Laboratory of Environmental‑Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China;Schoolof Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,四川绵阳621010 [2]西南科技大学材料与化学学院,四川绵阳621010

出　　处：《含能材料》2024年第5期484-491,共8页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(51972278)。

摘　　要：以5,5′-{[3,3′-双(1,2,4-噁二唑)]-5,5′-基}-双(1-羟基四唑)为配体,通过溶剂热法制备了一种新型含能铁簇化合物[Fe_(2)Ⅲ(μ2-CH_(3)O)(μ_(3)-OH)(μ_(2)-O)(BODTO^(2-))(H_(2)O)]4(1),并对其进行了单晶X-射线衍射、差示扫描量热和热重分析等表征,分析了其结构和热稳定性,同时通过差热分析仪研究了化合物1对高氯酸铵(AP)热分解的催化性能。测试结果表明,化合物1为立方晶系I-43d空间群,密度为1.506 g·cm^(-3);晶体结构中Fe^(3+)与Fe^(3+)通过氧原子桥联,形成笼状结构;热分解峰值温度为513.9,617.6 K和669.4 K;爆速为6.94 km·s^(-1),爆压为19.09 GPa;撞击感度为15 J,摩擦感度为360 N。当添加质量分数为10%的化合物1时,AP的高温分解温度降低65 K,活化能降低82.2 kJ·mol^(-1),证实该铁簇化合物对AP的热分解具有较好的催化活性,具有应用于含能燃烧催化剂的潜质。A new energetic iron-oxygen cluster,[Fe_(2)Ⅲ(μ_(2)-CH_(3)O)(μ_(3)-OH)(μ_(2)-O)(BODTO^(2-))(H_(2)O)]_(4)(1),was synthesized by solvothermal method using 5,5′-{[3,3′-bis(1,2,4-oxadiazole)]-5,5′-yl}-bis(1-hydroxytetrazole)as ligand.The structure and thermal stability of compound 1 were studied by single-crystal X-ray diffraction,differential scanning calorimetry and thermo-gravimetric analysis.The catalytic performance of compound 1 on the thermal decomposition of ammonium perchlorate(AP)was also investigated by differential thermal analyzer.Compound 1 crystallizes in cubic I-43d space group with a density of 1.506 g·cm^(-3).In the crystal structure,the nearby Fe^(3+)cations are interconnected to each other by bridging oxygen atoms.Through those connections,the iron(Ⅲ)cluster cages are formed.The peak thermal decomposition temperatures of compound 1 are 513.9,617.6 K and 669.4 K,respectively.The detonation velocity and detonation pressure of compound 1 are 6.94 km·s-1 and 19.09 GPa,respectively.In addition,the impact sensitivity and friction sensitivity of compound 1 are 15 J and 360 N,re-spectively.After adding 10%compound 1 to AP,the high temperature decomposition temperature of AP decreases by 65 K,and the decomposition activation energy decreases by 82.2 kJ·mol-1,demonstrating the high catalytic activity of compound 1 for the thermal decomposition of AP and the great potential of compound 1 for application in energetic combustion catalysts.

关 键 词：含能配合物 铁簇 高氯酸铵 热分解 热催化 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O62[理学—有机化学]