Cover Picture: Thiazolo[5,4‐d]thiazole‐Based Donor–Acceptor Covalent Organic Framework for Sunlight‐Driven Hydrogen Evolution (Angew. Chem. Int. Ed. 4/2021)

Donor–acceptor conjugation and co-planar π–π stacking facilitate charge separation and electron transport in a porous covalent–organic framework, as described by Hui Yang, Yue-Biao Zhang, Ke Wen et al. in their Research Article on page 1869. The synthesized COF shows high photocatalytic activity for sustainable and efficient water splitting.