Development of advanced materials with high CO₂ capture capacity and, inter alia, superior regenerability with low energy consumption (low-temperature CO₂ release) remains highly desired yet challenging. Herein, we firstly report the precipitation-involved CO₂ capture from ultradilute sources (e.g., exhaled gas and indoor air) and the reversible room-temperature CO₂ release accelerated by mechanical power using a covalent organic superphane cage. This superphane-based operating system enables CO₂ in ultradilute gas (>6%) to be concentrated up to 83%. As inferred from the control experiments and theoretical calculations, this proof-of-concept CO₂ capture and concentration system with mechanical power-triggered CO₂ release by the discrete organic cage could be rationalized by the formation of a six-membered ring transition state with relatively low energy barrier during the process of the adsorption and desorption of CO₂ on the cage surface, along with the precipitation-involved phase change.

开发具有高CO ₂捕获能力以及尤其是具有低能耗（低温CO ₂释放）的优异可再生性的先进材料仍然是人们非常期望但具有挑战性的。在此，我们首先报道了从超稀源（例如呼出气体和室内空气）中捕获与降水相关的CO ₂以及使用共价有机超凡笼通过机械动力加速的可逆室温CO ₂释放。这种基于superphane的操作系统使超稀气体(>6%)中的CO ₂浓缩度高达83%。从控制实验和理论计算推断，这种概念验证的 CO ₂捕获和浓缩系统通过离散有机笼通过机械动力触发 CO ₂释放，可以通过形成六元环过渡态来合理化CO ₂在笼表面的吸附和解吸过程以及沉淀涉及的相变过程中具有相对较低的能垒。