2H3O·[Co8(HPO3)9(CH3OH)3]·2H2O: An Open-Framework Cobalt Phosphite Containing Extra-Large 18-Ring Channels

A new open-framework cobalt phosphite 2H3O·[Co8(HPO3)9(CH3OH)3]·2H2O with extra-large 18-ring channels has been synthesized solvothermally. Its structure features novel 2D cobalt–oxygen 18-net sheets which are linked by HPO3 pseudo-pyramids to form a 3D open framework with pendent –CH3 groups protruding into the 18-ring channels.