Citation: Jianding LI, Junyang FENG, Huimin REN, Gang LI. Proton conductive properties of a Hf(Ⅳ)-based metal-organic framework built by 2,5-dibromophenyl-4,6-dicarboxylic acid[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(6): 1094-1100. doi: 10.11862/CJIC.20240464 shu

Proton conductive properties of a Hf(Ⅳ)-based metal-organic framework built by 2,5-dibromophenyl-4,6-dicarboxylic acid

Jianding LI ¹ ,
Junyang FENG ^1,, ,
Huimin REN ² ,
Gang LI ^2,,

1.
School of Pharmaceutical Engineering, Henan Technical Institute, Zhengzhou 450042, China
2.
College of Chemistry, Zhengzhou University, Zhengzhou 450001, China

Corresponding author: Junyang FENG, 156736620@qq.com Gang LI, gangli@zzu.edu.cn
Received Date: 30 December 2024
Revised Date: 11 April 2025

Figures(13)

Using 2,5-dibromophenyl-4, 6-dicarboxylic acid (H₂BDC-Br₂) as the bridging ligand and through the rapid synthesis method, it was self-assembled with HfCl₄ to successfully prepare a three-dimensional porous hafnium-based metal-organic framework (UiO-66-Br₂-Hf, 1). Firstly, through characterization methods such as thermogravimetric analysis (TGA) and powder X-ray diffraction (PXRD), the excellent structural stability of ₁ was confirmed. Subsequently, its proton conductivity, assisted by water molecules, was systematically investigated, and it was found that the proton conductivity of 1 was positively correlated with temperature and relative humidity (RH). At 100 ℃ and 98% RH, its proton conductivity reached 3.11×10^-3 S·cm^-1. Finally, combined with structural analysis, nitrogen and water vapor adsorption tests, and activation energy calculations, the proton conductivity mechanism of 1 was explored.
- 2,5-dibromoterephthalic acid,
- Hf(Ⅳ),
- metal-organic framework,
- proton conduction,
- conducting mechanism
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