Lanthanide Coordinated Poly(Thioctic Acid) Materials with Enhanced Strength and Room Temperature Self‐Healing Performance

⁺-coordination increases the mechanical modulus of the films by more than 100-fold while significantly improving toughness and strength. This is attributed to the large ionic radius and high coordination number of Eu ions with carboxylates which significantly enhanced the strength of the crosslinked network. This strategy offers a novel pathway for developing supramolecular materials with an optimal balance of mechanical strength and self-repairing capabilities, advancing their potential in various applications.