复合固体推进剂是一种固体颗粒(氧化剂及金属燃料)填充高分子聚合物(粘合剂)的复合材料，是导弹、空间飞行器的各类固体发动机的动力源。本实验教学针对固体推进剂在载荷下容易发生“脱湿”，即粘合剂与填料表面之间分离，界面作用受到破坏的情况，通过可控自由基聚合设计了结构规整、分子量及组成可控的新型中性大分子键合剂，通过核磁氢谱及凝胶渗透色谱系统表征了其分子结构。本综合实验教学不仅加深了学生对固体推进剂领域的理解，提升了学生对于前沿高分子化学的基本原理及方法的认知，而且训练了学生的实验操作技能、大型仪器使用能力和结果分析能力，实现了前沿科学研究与国家重大需求在人才培养的结合。

To achieve efficient catalytic hydrogenation of CO₂ to formate, we employed a transmetallation strategy to develop three novel iridium(Ⅰ) complexes, which feature N-heterocyclic carbene-nitrogen-phosphine ligands (CNP) and a 1, 5-cyclooctadiene (cod) molecule: [Ir(cod)(κ³-CN^imP)]Cl (1-Cl), [Ir(cod)(κ³-CN^imP)]PF₆ (1-PF₆), and [Ir(cod)(κ³-CN^HP)]Cl (2). The ¹H NMR spectra, ³¹P NMR spectra, and high-resolution mass spectra verify the successful synthesis of these three Ir(Ⅰ)-CNP complexes. Furthermore, single-crystal X-ray diffraction analysis confirms the coordination geometry of 1-PF₆. The strong Ir—C(NHC) bond suggests that the carbene carbon plays an enhanced anchoring role to iridium due to its strong σ-donating ability, which helps stabilize the active metal species during CO₂ hydrogenation. As a result, the Ir(Ⅰ)-CNP complex exhibits remarkable activity and long catalytic lifetime for the hydrogenation of CO₂ to formate, reaching a turnover number (TON) of 1.16×10⁶ after 150 h at a high temperature of 170 ℃, which was a relatively high value among all the Ir complexes.