One of the candidate MOFs of re-activation, MUNDEG, or JLU-Liu16, was prepared with similar method to previously reported one. 19 H2CPNA (0.0075 g, 0.0308 mmol), CuI (0.0133 g, 0.0698 mmol), Dabco (0.0011 g, 0.0981 mmol) were dissolved in 1,4-Dioxane (1.4 mL), and DMF (3 mL) mixed solution in a vial (10mL capacity). The vial was sealed and kept in oven at 115 °C for 48 hours and cooled to ambient temperature. The green block crystals were collected from the wall of the vial, after discarding the product on bottom surface of vial to avoid any inevitable by-product. The products for nitrogen sorption analysis were collected from 30 vials, washed with fresh DMF, and hexane 3 times for 3 days, respectively. The identity of MUNDEG was confirmed by XRD patterns of these bulk sample (Figure ). The activation of MUNDEG was performed at 30 °C for 18 hours under vacuum condition. The nitrogen isotherm of MUNDEG was conducted at 77K, and Brunauer-Emmett-Teller (BET) surface area (1436 m 2 / g) was acquired from the plot (Figure ), which is greater than 50% of the theoretical surface area (2242 m 2 / g) calculated from Zeo++.