In this study, a new copper-based metal-organic framework, Cu3 (μ8-mtif) 1. 5 (DMF) 3·10H2O·4DMFn (OGU-3), was synthesized using 5, 5'- (3-methylthiophene-2, 5-diyl) diisophthalic acid (H4mtif) as an organic linker through a solvothermal method. Single-crystal X-ray diffraction analysis revealed that the OGU-3 possesses a three-dimensional porous architecture with a high surface area (2612 m2/g). The framework contains one-dimensional channels along the c-axis with dimensions of approximately 11. 26 × 15. 48 Å. Gas adsorption measurements demonstrated that the material exhibits a remarkable CH4 uptake capacity, attributed to its large surface area and optimized pore environment. High-pressure CH4 adsorption measurements revealed that OGU-3 exhibits a remarkable gravimetric CH4 uptake of 292. 5 cc (STP) /g at 25 °C and 65 bar, representing 5. 4% enhancement over its nonmethylated analogue. The findings highlight the potential of thiophene-functionalized ligands in designing high-performance MOFs for efficient CH4 storage applications. This work provides valuable insights into the development of advanced porous materials for energy-related gas storage technologies.
Yeşilel et al. (Sun,) studied this question.