Covalent Organic Frameworks for Carbon Dioxide Capture from Air,Journal of the American Chemical Society

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Covalent Organic Frameworks for Carbon Dioxide Capture from Air
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2022-07-05 , DOI: 10.1021/jacs.2c05382
Hao Lyu ₁ , Haozhe Li ₁ , Nikita Hanikel ₁ , Kaiyu Wang ₁ , Omar M Yaghi _{1,

2}

Affiliation

We report the first covalent incorporation of reactive aliphatic amine species into covalent organic frameworks (COFs). This was achieved through the crystallization of an imine-linked COF, termed COF-609-Im, followed by conversion of its imine linkage to base-stable tetrahydroquinoline linkage through aza-Diels–Alder cycloaddition, and finally, the covalent incorporation of tris(3-aminopropyl)amine into the framework. The obtained COF-609 exhibits a 1360-fold increase in CO₂ uptake capacity compared to the pristine framework and a further 29% enhancement in the presence of humidity. We confirmed the chemistry of framework conversion and corroborated the enhanced CO₂ uptake phenomenon with and without humidity through isotope-labeled Fourier transform infrared spectroscopy and solid-state nuclear magnetic resonance spectroscopy. With this study, we established a new synthetic strategy to access a class of chemisorbents characterized by high affinity to CO₂ in dilute sources, such as the air.

中文翻译：

用于从空气中捕获二氧化碳的共价有机框架

我们报告了第一次将反应性脂肪胺物质共价结合到共价有机框架 (COF) 中。这是通过亚胺连接的 COF（称为 COF-609-Im）的结晶，然后通过氮杂-狄尔斯-阿尔德环加成将其亚胺键转化为碱稳定的四氢喹啉键，最后将 tris( 3-氨基丙基）胺进入框架。与原始框架相比，获得的 COF-609 的 CO ₂吸收能力提高了 1360 倍，并且在存在湿度的情况下进一步提高了 29%。我们证实了骨架转化的化学性质并证实了增强的 CO ₂通过同位素标记的傅里叶变换红外光谱和固态核磁共振光谱，在有和没有湿度的情况下吸收现象。通过这项研究，我们建立了一种新的合成策略，以获取一类化学吸附剂，其特点是对空气等稀释源中的 CO _{2具有高亲和力。}

更新日期：2022-07-05

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