Dynamic Metal–Ligand Bonds as Scaffolds for Autonomously Healing Multi‐Responsive Materials

Supramolecular functional materials featuring self‐healing properties are a fascinating class of materials that are currently attracting great interest. In this respect, use of dynamic metal–ligand bonds has received much less attention than other reversible interactions – either covalent bonds or noncovalent interactions. Nonetheless, systems and materials with enhanced and special functionalities might arise from the synergic combination of labile coordination bonds and the physicochemical properties – optical, magnetic, electrical, catalytic, and so on – associated with the presence of judiciously chosen metal ions or organic ligands. Here, advances in the field of healing and multi‐functional materials based on the reversible formation of metal‐ligand bonds are highlighted through a selection of key examples, including bioinspired ones. Depending on the metal atom, its oxidation state, and coordination sphere, stable yet dynamic metal–ligand interactions that complement the supramolecular toolbox are accessible. This Microreview provides an overview on smart healing materials that respond to external stimuli and can be prepared by use of suitable combinations of reversible coordination bonds and organic ligands.