Abstract
Excited‐state intramolecular proton transfer (ESIPT) enables the rearrangement of photoinduced charge distribution and results in the structural isomerization in the excited state. The EISPT mechanism can be used for optimizing the photocatalytic performances of β‐ketoenamine‐linked two‐dimensional covalent organic frameworks (COFs). It has been demonstrated that the modification of building blocks with electron‐withdrawing cyano‐groups benefits the ESIPT‐induced photoisomerization for COFs, thereby promoting photocatalytic activity and achieving the excellent hydrogen evolution performances from water splitting. More details are discussed in the article by Guo et al. on pages 2621—2626.image
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