Flexible Units Induced Three-Dimensional Covalent Organic Frameworks with a Heteromotif Molecular Junction for Photocatalytic H 2 O 2 Production

In recent years, significant progress has been achieved in the field of three-dimensional covalent organic frameworks (3D COFs). However, there is still a great challenge to use flexible building units to synthesize high-connectivity 3D COFs. In this work, we showed that [6 + 3] 3D COFs could be constructed by inducing highly flexible planar building blocks from C3 antitriangular prismed 3D building blocks. Herein, two 3D COFs with spn topology based on flexible cyclotriphosphazene units were constructed and denoted as TAA/TAB-CTP-COF, and their redox ability and photophysical features can be finely regulated by the coupled functional group, such as benzene and triazine groups. As a result, the redox…

• NN
  National Natural Science Foundation of China

  Awards: 22201083, 22225109, 22071109, 22105080
• CP
  China Postdoctoral Science Foundation

  Awards: 2021M701270, 2020M682748
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Awards: 2023A1515010779, 2023A1515010928