Back Cover: Light‐Triggered Transformable Ferrous Ion Delivery System for Photothermal Primed Chemodynamic Therapy (Angew. Chem. Int. Ed. 11/2021)

A light-triggered Fe2+ delivery agent (LET-6) for photothermal primed chemodynamic therapy (CDT) is described by Jing Lin and co-workers in their Research Article on page 6047. Thermal expansion of LET-6 by 808 nm laser irradiation transforms LET-6 into small fragments and triggers the release of Fe2+ and the generation of .OH for enhanced CDT.