Front Cover: The Zr8O6 Secondary Building Unit and Porphyrin Linker Catalyze Light-Driven H2 Evolution in Porphyrin-Based Metal Organic Frameworks (ChemSusChem 14/2025)

The Front Cover depicts the molecular structure of the Zr₈O₆-based metal-organic framework porous coordination network (PCN) 221 (CCDC ID: 925058) with its building blocks. In light-driven H₂ evolution, the porphyrin linker acts as a light-absorbing photosensitizer, and the Zr₈O₆-based secondary building unit (SBU) is active as a catalyst. The background features some green photosynthetic leaves that frame the study in the broader context of artificial photosynthesis and light energy conversion. More information can be found in the Research Article by A. Pannwitz and co-workers (DOI: 10.1002/cssc.202500372).