Azobenzene Decorated NbO-Type Metal–Organic Framework for High-Capacity Storage of Energy Gases

Herein, a microporous NbO-type framwork (FJI-H23) that showed outstanding surface area (3740.4 m2·g-1) was fabricated by utilizing an azobenzene-derived carboxylate ligand. As anticipated, FJI-H23 can store 2.35 wt % H2 at 77 K up to 1 bar. Furthermore, FJI-H23 exhibits high-capacity storage of C2 and C3 hydrocarbons at room temperature. Especially, the uptake amount of C3H8 is 325.76 cm3·g-1 at 298 K, which represents the new record of C3H8 adsorption capacity in the MOFs materials. In addition, FJI-H23 exhibits excellent gravimetric total uptake of 332 cm3·g-1 at 298 K and 65 bar.