Wang Qian-You, Wang Jie, Wang Shan, Wang Zhao-Yang, Cao Man, He Chun-Lin, Yang Jun-Qing, Zang Shuang-Quan, Mak Thomas C W
Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
J Am Chem Soc. 2020 Jul 15;142(28):12010-12014. doi: 10.1021/jacs.0c04638. Epub 2020 Jul 1.
Atomically precise -carboranealkynyl-protected clusters [Ag(CBH)(CHCN)]·2NO (CBA-Ag) and [CuAg(CBH)Cl]NO (CBA-CuAg) have been found to exhibit hypergolic activity, such that they are capable of spontaneous ignition and combustion upon contact with the white fuming nitric acid oxidizer. In particular, CBA-CuAg has a short ignition delay time of 15 ms, whereas the -carboranealkynyl ligand is hypergolically inert. Systematic investigation revealed that the metal cluster core catalyzed the hypergolic behavior of inert -carboranealkynyl ligand, and Cu doping further accelerated combustion catalysis. This work provides a new prospective in the rational design of novel metal cluster-based hypergolic fuels for propellant application.
原子精确的 - 碳硼烷炔基保护簇合物[Ag(CBH)(CHCN)]·2NO（CBA - Ag）和[CuAg(CBH)Cl]NO（CBA - CuAg）已被发现具有自燃活性，以至于它们在与白色发烟硝酸氧化剂接触时能够自燃和燃烧。特别是，CBA - CuAg的点火延迟时间很短，仅为15毫秒，而 - 碳硼烷炔基配体则具有自燃惰性。系统研究表明，金属簇核催化了惰性 - 碳硼烷炔基配体的自燃行为，并且铜掺杂进一步加速了燃烧催化。这项工作为合理设计用于推进剂应用的新型基于金属簇的自燃燃料提供了新的前景。
