Nickel coordination polymer with entrapped naphthalene molecules

The hydrothermal reaction of a nickel sulfate hexahydrate with 1,3,5-benzenetricarboxylic acid, 4,4′-bipyridine, and naphthalene yields a green needle (2D coordination polymer) formulated as [Ni2(bpy)2(btcH)2] · (C10H8)0.75 · H2O. This metal organic framework has two kinds of pores which are hydrophobic pores entrapped naphthalene molecules and hydrophilic pores for water molecules.