Lanthanide‐Containing Bilayer Polymers With Programmable Wrinkling Dynamics Coherent With Visible Light

Abstract A family of lanthanide metallopolymer/polyurethane bilayer polymers exhibiting multicolor luminescence and tunable wrinkling behavior are engineered to combat escalating challenges in information forgery and data leakage. These architectures are fabricated by spin‐coating a lanthanide‐coordinated metallopolymer skin layer onto a polyurethane substrate, facilitating strained‐induced topographical transformations through a tensile‐release process. During dynamic relaxation, the emergent wrinkled topographies modulate optical diffraction, yielding three distinct states: diffuse scattering (frosted glass effect), constructive interference (iridescent rainbow effect), and optical transparency. The metallopolymer skin layer demonstrates high‐efficiency luminescence with broad‐spectrum chromatic emission, while the polyurethane substrate confers exceptional mechanical robustness, optical transparency, and intrinsic self‐healing properties. Consequently, a dual‐mode anti‐counterfeiting platform integrating luminescence and structural coloration is realized, offering facile activation, immediate visual verification, and enhanced durability with recyclability. These multifunctional materials exhibit superior performance metrics in encryption and hierarchical anti‐counterfeiting paradigms, surpassing contemporary security technologies in adaptability and functional sophistication.