Authors: Congjie Chen, Zhen Shan, Bocong Li, Jinjian Wang, Tongtong Liu, Shu‐Fan Li, Hongwei Yang, Jian Su, Gen Zhang
Published: 2024-12-18
Source: Full article
AbstractThe growing threat of electromagnetic pollution has become a pressing safety concern. Metal‐organic framework (MOF) derivatives are considered ideal candidates for mitigating electromagnetic radiation. However, due to the limitations imposed by complex post‐processing and disruption of pristine crystal structures, the mechanisms of electromagnetic wave absorption remain unclear, let alone achieving atomic‐level regulation in MOF derivatives. Moreover, research on MOF‐based electromagnetic wave absorbers (EMWA) has predominantly focused on 2D and 3D structures, leaving 1D MOFs largely unexplored. To address these challenges, a bottom‐up polarization gene weaving strategy is proposed to integrate polarizable conjugated groups, thieno(3,2‐b)thiophene (TBTT), into two types of conductive MOFs by fine‐tuning self‐assembly conditions. As expected, both MOFs exhibited strong natural polarization effects. Among them, the 1D linear coordination mode of CuTBTT‐1D demonstrated enhanced charge carrier mobility and geometric effects compared to the 2D structure, CuTBTT‐2D. The synthesized 1D molecular polarization wire, with a thickness of 2.2 mm, achieved ultra‐high reflection loss (−77 dB) and super‐wide absorption bandwidth (6.52 GHz). Its performance surpasses that of all known MOF‐based EMWAs. This study provides a valuable strategy for the rational design of next‐generation 1D MOF EMWA with atomic precision.