Citation: Qichao Dong, Haipeng Lu, Wansong Gu, Kai Zheng, Peiheng Zhou, Ruoyu Chen, Guanxiang Zhong, Hetao Chu. Reversible dielectric MOF driven by hydrogen bonds in confined space at gigahertz[J]. Chinese Chemical Letters, ;2026, 37(12): 111912. doi: 10.1016/j.cclet.2025.111912 shu

Reversible dielectric MOF driven by hydrogen bonds in confined space at gigahertz

Qichao Dong ^a ,
Haipeng Lu ^{a, b} ,
Wansong Gu ^a ,
Kai Zheng ^a ,
Peiheng Zhou ^{a, b} ,
Ruoyu Chen ^a ,
Guanxiang Zhong ^a ,
Hetao Chu ^{a, b, *,}

a.
National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
b.
Key Laboratory of Multispectral Absorbing Materials and Structures of Ministry of Education, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

chuht@uestc.edu.cn

Received Date: 22 August 2025
Revised Date: 18 September 2025
Accepted Date: 27 September 2025
Available Online: 28 September 2025

Figures(4)

The dielectric response of materials can be generated through temperature induced dipole polarization. However, the response is typically weak at gigahertz, because the external electric field change is too fast for the dipole orientation motion, and thermal molecular motion further diminishes dipole polarization. Herein, we explored a novel type of metal-organic frameworks using dipole amine as the guest molecule to create a hydrogen bonding system that cyclic break and reconstruction under moderate thermal stimulation. The dipoles transition between constrained and dissociated states, achieving a fourfold reduction in reorientation relaxation time. Meanwhile, the confined space of the metal-formate framework inhibits thermal molecular motion, allowing for independent control of dipole polarization. Consequently, the MOF shows a maximum change of nearly two orders of magnitude of reversible dielectric properties at gigahertz.
- Reversible dielectric,
- Hydrogen bonds,
- MOF,
- Gigahertz,
- Confined space
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