Design and Synthesis of a High-Performance Copper(II) Metal–Organic Framework Featuring Large Surface Area and Enhanced Methane Adsorption Capacity from a Thiophene-Functionalized Diisophthalic Acid Ligand

YEŞİLEL O. Z., Coşkun F. T., Aydogdu A. S., Uzun A., Gulbalkan H. C., Keskin S., ...More

Inorganic Chemistry, vol.65, no.14, pp.8094-8103, 2026 (SCI-Expanded, Scopus) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 65 Issue: 14
  • Publication Date: 2026
  • Doi Number: 10.1021/acs.inorgchem.6c00691
  • Journal Name: Inorganic Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, DIALNET, Nature Index
  • Page Numbers: pp.8094-8103
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

In this study, a new copper-based metal–organic framework, {[Cu3(μ8-mtif)1.5(DMF)3]·10H2O·4DMF}n (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.