The construction of three-dimensional (3D) covalent organic frameworks (COFs), especially fully conjugated 3D COFs, is a long-standing challenge. Herein, we report a saddle-like, π-conjugated cyclooctatetrathiophene (COTh) as a tetrahedral node to construct fully conjugated 3D COFs. The present work enriches the structural diversities and potential applications of 3D COFs.

中文翻译：

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基于π共轭四面体节点的三维共价有机骨架

三维（3D）共价有机框架（COFs）的构建，尤其是完全共轭的3D COFs，是一个长期存在的挑战。在此，我们报告了一种马鞍状的 π 共轭环八四噻吩 (COTh) 作为四面体节点来构建完全共轭的 3D COF。目前的工作丰富了 3D COF 的结构多样性和潜在应用。