Wang Chao, Wang Ya-Jie, He Chun-Lin, Wang Qian-You, Zang Shuang-Quan
Henan Key Laboratory of Crystalline Molecular Functional Materials, Henan International Joint Laboratory of Tumor Theranostical Cluster Materials, Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
Chongqing Innovation Center, Beijing Institute of Technology, Chongqing 401120, China.
JACS Au. 2021 Oct 11;1(12):2202-2207. doi: 10.1021/jacsau.1c00334. eCollection 2021 Dec 27.
Increasing research efforts have been focused on developing next-generation propellants. In this work, we demonstrated that assembling zero-dimensional (0D) silver clusters with energetic ligands into 3D metal organic frameworks (MOFs) not only inherited the short ignition delay (ID) time of the alkynyl-silver cluster but also significantly increased the output energy. Among them, the open cationic framework of ZZU-363 incorporating counter NO ions achieved a considerably reduced energy barrier and eventually the shortest ID time (26 ms), together with the highest volumetric energy density (40.4 kJ cm) and specific impulse (263.1 s), which is far superior to traditional hydrazine-based propellants. The underlying mechanisms are clearly revealed by theoretical calculations. This work opens a venue to significantly enhancing the hypergolic activity of metal clusters and MOFs.
越来越多的研究工作集中在开发下一代推进剂上。在这项工作中，我们证明了将零维（0D）银簇与含能配体组装成三维金属有机框架（MOF）不仅继承了炔基银簇的短点火延迟（ID）时间，而且显著提高了输出能量。其中，包含抗衡NO离子的ZZU-363开放阳离子框架实现了显著降低的能垒，并最终实现了最短的ID时间（26毫秒），以及最高的体积能量密度（40.4 kJ/cm³）和比冲（263.1秒），这远远优于传统的肼基推进剂。理论计算清楚地揭示了其潜在机制。这项工作为显著提高金属簇和MOF的自燃活性开辟了一条途径。
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