A Nine-Connected Mixed-Ligand Nickel-Organic Framework and Its Gas Sorption Properties

A nine-connected metal organic framework [Ni(2)(II)Ni(III)-(mu(3)-OH)(IN)(3) (BDC)(1.5)]center dot xSolvent (BDC = benzene-1,4-dicarboxylate, IN = isonicotinate) has been prepared and characterized. The application of the scale-down chemistry through the use of the short and inexpensive BDC and IN ligands leads to a smaller pore size and lower surface area but little compromise in H(2) sorption properties. The compound exhibits a high CO(2) uptake of 73.1 cm(3) g(-1) (273 K and 1 atm) despite its moderate Langmuir and BET surface areas (888.3 and 571.0 m(2) g(-1), respectively). Its H(2) uptake (1.47 wt % at 77K and 1 atm) is also quite high, comparable to that of many materials with high surface area.