Front Cover: Open‐Chain Tetrapyrroles Meet Metal Ions in the Functional Molecular Material Science (ChemPlusChem 6/2025)

The front cover illustrates the development of various functional molecular materials based on open‐chain tetrapyrrole molecules, focusing on their metal complexation. Examples include applications in circularly polarized luminescence (CPL) devices, ion sensing, spintronics, and bio‐theranostics. The work highlights the synthesis of related molecular systems and summarizes their remarkable optical and electronic properties induced by interactions with metal ions. More information can be found in the Research Article by Hiroyuki Furuta, Masatoshi Ishida, and co‐workers (DOI: 10.1002/cplu.202500090 ).