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OA北大核心CSTPCD

A new energetic iron-oxygen cluster,[Fe2Ⅲ(μ2-CH3O)(μ3-OH)(μ2-O)(BODTO2-)(H2O)]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 Fe3+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.