To synthesize MOF-303, 1H-pyrazole-3,5-dicarboxylic acid, monohydrate (7.50 g, 43.1 mmol) was dissolved in deionized H2O (725 mL) and LiOH solution (2.57 M, 25 mL). The resulting solution was heated for 30 min in a preheated oven at 120 °C. Afterward, AlCl3•6H2O (10.4 g, 43.1 mmol) was added to the solution. Any precipitate was dissolved under sonication and vigorous shaking. Once a clear solution was obtained, the hot reaction mixture was put in a preheated oven at 100 °C, where it was kept for 15 hrs. Then, the precipitate was filtered out and washed with water. The white solid was washed with methanol for 24 hrs in a Soxhlet apparatus and air-dried for 3 days. Further, the product was dried under vacuum (<10 -2 mbar) for 24 hrs. Full activation of the MOF was performed under vacuum (~10 -3 mbar) and at 150 °C for 6 hrs, yielding a pure, desolvated product (3.6 g).