Metal-organic frameworks with fine-tuned interlayer spacing for microwave absorption

Metal-organic frameworks with fine-tuned interlayer spacing for microwave absorption

13 March 2024 | Xue Zhang, Xuelei Tian, Na Wu, Shanyu Zhao, Yutian Qin, Fei Pan, Shengying Yue, Xinyu Ma, Jing Qiao, Wei Xu, Wei Liu, Jiurong Liu, Meiting Zhao, Kostya (Ken) Ostrikov, Zhihui Zeng
This study presents a novel approach to design conductive metal-organic frameworks (cMOFs) with tunable interlayer spacing for efficient microwave absorption. By adjusting the ratio of Zn and Cu metal ions in the bimetallic framework (ZnCu-HHTP), the interlayer spacing of the 2D MOFs is precisely controlled, enabling fine-tuning of charge transport, band structure, and dielectric properties. The optimal Zn3Cu1-HHTP cMOF exhibits an ultra-strong reflection loss of -81.62 dB in the gigahertz microwave range, achieving a wide effective absorption bandwidth (EAB) of 3.7 GHz. This performance is comparable to the best reported microwave absorbers. The study demonstrates that the intrinsic microstructure of cMOFs significantly influences their electrical conductivity and electromagnetic wave (EMW) absorption properties. The developed method provides a generic nanotechnology-based approach for achieving controllable interlayer spacing in MOFs, enabling targeted applications. The results highlight the importance of interlayer engineering in 2D MOFs for optimizing electronic band structures and dielectric properties. The Zn3Cu1-HHTP cMOF shows excellent EMW absorption performance due to its tunable dielectric properties, enhanced dipole polarization, and anisotropic microstructure. The study also confirms the effectiveness of the interlayer engineering approach in achieving high-performance EMW absorption materials. The findings open new avenues for developing cMOF-based EMW absorption materials and provide insights into the structure-function relationships in MOFs. The study demonstrates that the interlayer spacing can be finely tuned by adjusting the ratios of metallic ions in bimetallic MOFs, leading to optimized electronic band structures and dielectric properties. The Zn3Cu1-HHTP cMOF exhibits superior EMW absorption performance, making it a promising candidate for high-performance stealth materials. The study highlights the potential of bimetallic cMOFs for targeted applications, offering a versatile approach to achieve controllable interlayer spacing and dielectric properties in MOFs. The results demonstrate the effectiveness of the interlayer engineering approach in achieving high-performance EMW absorption materials. The study provides a comprehensive understanding of the structure-function relationships in cMOFs and offers a generic method for achieving controllable interlayer spacing in MOFs for targeted applications. The Zn3Cu1-HHTP cMOF shows excellent EMW absorption performance, making it a promising candidate for high-performance stealth materials. The study highlights the potential of bimetallic cMOFs for targeted applications, offering a versatile approach to achieve controllable interlayer spacing and dielectric properties in MOFs. The results demonstrate the effectiveness of the interlayer engineering approach in achieving high-performance EMW absorption materials.This study presents a novel approach to design conductive metal-organic frameworks (cMOFs) with tunable interlayer spacing for efficient microwave absorption. By adjusting the ratio of Zn and Cu metal ions in the bimetallic framework (ZnCu-HHTP), the interlayer spacing of the 2D MOFs is precisely controlled, enabling fine-tuning of charge transport, band structure, and dielectric properties. The optimal Zn3Cu1-HHTP cMOF exhibits an ultra-strong reflection loss of -81.62 dB in the gigahertz microwave range, achieving a wide effective absorption bandwidth (EAB) of 3.7 GHz. This performance is comparable to the best reported microwave absorbers. The study demonstrates that the intrinsic microstructure of cMOFs significantly influences their electrical conductivity and electromagnetic wave (EMW) absorption properties. The developed method provides a generic nanotechnology-based approach for achieving controllable interlayer spacing in MOFs, enabling targeted applications. The results highlight the importance of interlayer engineering in 2D MOFs for optimizing electronic band structures and dielectric properties. The Zn3Cu1-HHTP cMOF shows excellent EMW absorption performance due to its tunable dielectric properties, enhanced dipole polarization, and anisotropic microstructure. The study also confirms the effectiveness of the interlayer engineering approach in achieving high-performance EMW absorption materials. The findings open new avenues for developing cMOF-based EMW absorption materials and provide insights into the structure-function relationships in MOFs. The study demonstrates that the interlayer spacing can be finely tuned by adjusting the ratios of metallic ions in bimetallic MOFs, leading to optimized electronic band structures and dielectric properties. The Zn3Cu1-HHTP cMOF exhibits superior EMW absorption performance, making it a promising candidate for high-performance stealth materials. The study highlights the potential of bimetallic cMOFs for targeted applications, offering a versatile approach to achieve controllable interlayer spacing and dielectric properties in MOFs. The results demonstrate the effectiveness of the interlayer engineering approach in achieving high-performance EMW absorption materials. The study provides a comprehensive understanding of the structure-function relationships in cMOFs and offers a generic method for achieving controllable interlayer spacing in MOFs for targeted applications. The Zn3Cu1-HHTP cMOF shows excellent EMW absorption performance, making it a promising candidate for high-performance stealth materials. The study highlights the potential of bimetallic cMOFs for targeted applications, offering a versatile approach to achieve controllable interlayer spacing and dielectric properties in MOFs. The results demonstrate the effectiveness of the interlayer engineering approach in achieving high-performance EMW absorption materials.
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