Electromagnetic Wave Absorbing Materials Derived from Rare Earth Ions Enriched via Host-Guest Interactions in Anion Metal-Organic Frameworks

• • Achieved minimum reflection loss (RL) of -79.20 dB, indicating near-perfect absorption of incident EMW, critical for stealth and EMI shielding applications where signal reflection must be minimized. • • Maximum effective absorption bandwidth (EAB) of 5.23 GHz covers the entire Ku band (12-18 GHz), enabling broadband operation for radar and satellite communications. • • Utilized host-guest enrichment in anionic MOF (MOZ-200) to uniformly disperse five rare earth ions (La3+, Ce3+, Pr3+, Nd3+, Y3+), converting them into high-entropy alloy nanoparticles, demonstrating a scalable method for rare earth utilization. • • Integrated HE@C with polyurethane to create a flexible film with multifunctionality (EMW absorption, photothermal heating, microwave de-icing, hydrophobicity), expanding applicability to wearable and deformable electronic devices.