Cyanurate-Linked Covalent Organic Frameworks Enabled by Dynamic Nucleophilic Aromatic Substitution
Cyanurate-Linked Covalent Organic Frameworks Enabled by Dynamic Nucleophilic Aromatic Substitution
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DOI：
10.1021/jacs.2c00778
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发表时间：
2022-09-27
影响因子：
15
通讯作者：
Zhang, Wei
中科院分区：
文献类型：
--
作者：
Lei, Zepeng;Wayment, Lacey J.;Zhang, Wei
我们报告，第一次，高度结晶氰尿酸酯连接的共价有机框架，通过动态亲核芳香取代合成。高结晶度是由2，4，6-三苯氧基-1，3，5-三嗪和二酚之间通过三氮杂双环癸烯催化的可逆SNAr的键交换反应（自校正）实现的。CN-COF含有柔性骨架，由于层间氢键相互作用，其表现出独特的AA '-堆叠。等网格展开研究证明了这种合成方法的普遍适用性。所得CN-COFs具有良好的稳定性和较高的CO2/N2选择性。
We report, for the first time, highly crystalline cyanurate-linked covalent organic frameworks synthesized via dynamic nucleophilic aromatic substitution. The high crystallinity is enabled by the bond exchange reaction (self-correction) between 2,4,6triphenoxy-1,3,5-triazine and diphenols via reversible SNAr catalyzed by triazabicyclodecene. The CN-COFs contain flexible backbones that exhibit a unique AA '-stacking due to interlayer hydrogen bonding interactions. The isoreticular expansion study demonstrates the general applicability of this synthetic method. The resulting CN-COFs exhibited good stability, as well as high CO2/N2 selectivity.