Postsynthetic Transformation of Imine- into Nitrone-Linked Covalent Organic Frameworks for Atmospheric Water Harvesting at Decreased Humidity,Journal of the American Chemical Society

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Postsynthetic Transformation of Imine- into Nitrone-Linked Covalent Organic Frameworks for Atmospheric Water Harvesting at Decreased Humidity
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2023-05-25 , DOI: 10.1021/jacs.3c02572
Lars Grunenberg _{1,

2} , Gökcen Savasci _{1,

2,

3} , Sebastian T Emmerling _{1,

2} , Fabian Heck _{1,

2} , Sebastian Bette ₁ , Afonso Cima Bergesch _{1,

2} , Christian Ochsenfeld _{1,

2,

3} , Bettina V Lotsch _{1,

2,

3}

Affiliation

Herein, we report a facile postsynthetic linkage conversion method giving synthetic access to nitrone-linked covalent organic frameworks (COFs) from imine- and amine-linked COFs. The new two-dimensional (2D) nitrone-linked covalent organic frameworks, NO-PI-3-COF and NO-TTI-COF, are obtained with high crystallinity and large surface areas. Nitrone-modified pore channels induce condensation of water vapor at 20% lower humidity compared to their amine- or imine-linked precursor COFs. Thus, the topochemical transformation to nitrone linkages constitutes an attractive approach to postsynthetically fine-tune water adsorption properties in framework materials.

中文翻译：

亚胺合成后转化为硝基连接的共价有机框架，用于在降低湿度下收集大气水

在此，我们报告了一种简便的合成后连接转换方法，可以从亚胺和胺连接的COF合成硝酮连接的共价有机框架（COF）。新型二维（2D）硝酮连接的共价有机骨架NO-PI-3-COF和NO-TTI-COF具有高结晶度和大表面积。与胺或亚胺连接的前体 COF 相比，硝酮改性的孔道在湿度低 20% 的情况下诱导水蒸气凝结。因此，硝酮键的拓扑化学转化构成了合成后微调骨架材料中水吸附性能的一种有吸引力的方法。

更新日期：2023-05-25

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