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submitted on 08.07.2020 and posted on 08.07.2020by Yuancheng Wang, Chenyu Wu, Wenjia Sun, Qingyan Pan, Wenbo Hao, Hui Liu, Jing Sun, Zhibo Li, Junliang Sun, Yingjie Zhao
covalent organic frameworks (3D COFs) adopting triptycene as core building
blocks were synthesized through [6 + 4] imine condensation reactions. The stp topology and the “6 + 4” linking
mode were first reported for constructing 3D COFs. A pore size of 4.0 nm was
obtained which is the largest record among the reported 3D COFs. The
interpenetration occurred by extending the size of the linkage. The rigid 3D
COFs exhibit unique honeycomb nanochannels structures with adjustable pore