For traditional cycloaddition reaction between CO₂ and epoxide, high temperature and high pressure are usually needed. In this work, we introduce Lewis acid Bi atom into the porphyrin ring of a metal–organic framework (MOF) structure (PCN-224) to facilitate the ring-opening of propylene oxide. In addition, light is introduced into the reaction, which enables the reaction to occur at ambient conditions (room temperature and 1 atm). Further investigations suggest that light plays an essential role in improving the efficiency, which activates the stable CO₂ molecule and lowers the energy barrier of the following cycloaddition reaction. This work provides a cost-effective and efficient approach to carry out the CO₂ cycloaddition reaction under ambient conditions.

中文翻译：

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双基金属有机框架在环境条件下将光促进的CO ₂从环氧转化为环状碳酸酯

对于CO ₂和环氧化物之间的传统环加成反应，通常需要高温和高压。在这项工作中，我们将路易斯酸Bi原子引入金属-有机骨架（MOF）结构（PCN-224）的卟啉环中，以促进环氧丙烷的开环。另外，将光引入反应中，这使得反应能够在环境条件（室温和1atm）下发生。进一步的研究表明，光在提高效率中起着至关重要的作用，它可以激活稳定的CO ₂分子并降低后续环加成反应的能垒。这项工作提供了一种在环境条件下进行CO ₂环加成反应的经济有效的方法。