Modulating the dipole polarization loss in the single-atom region and establishing its direct relationship with the EWA performance remain an unmet challenge.
Here, a dual-ligand modulation strategy, i.e., partially changing coordination atoms in the single-metal region (sMr), is introduced to effectively break the coordination symmetry of conjugated metal-organic frameworks (cMOFs), finally enhancing EWA property of cMOFs materials. Further, the asymmetrical sMr is experimentally found to elicit the dipole polarization loss, overcoming the handicaps of other electromagnetic wave loss mechanisms, which directly contribution to enhance EWA performance of this series of cMOFs. This strategy is further confirmed by replacing metal centers. Among studied series of cMOFs, Cu_2.25/Co_0.75(HHTP_1.67HITP_0.33) achieves excellent EWA performance with an effective absorption bandwidth of 5.00 GHz and a reflection loss of −66.03 dB.
This study not only provides novel insights into the fundamental understanding of dielectric loss mechanisms but also paves the way for the rational design and development of high-performance EWA materials with tailored multifunctionalities.
The work titled “Enhancing dipole polarization loss in conjugated metal-organic frameworks via coordination symmetry breaking under electromagnetic field”, was published on Advanced Powder Materials (Available online 19 May 2025).
DOI：https://doi.org/10.1016/j.apmate.2025.100302