Construction of a Three-fold Parallel Interpenetration Network and Bilayer Structure Based on Copper(II) and Trimesic Acid

Solvothermal reactions of Cu(NO₃)₂·3H₂O with trimesic acid (H₃BTC) at different pH conditions yield two coordination polymers of [Cu₃(BTC)₂(H₂O)₃(NH₃)₄]_n·2nH₂O (1) and [Cu₄(BTC)₂(OH)₂(H₂O)₂(NH₃)₄]_n (2). Crystal structural analysis reveals that complex 1 exhibits a three-fold parallel interpenetration network and complex 2 shows a two-dimensional bilayer structure. Crystal data are orthorhombic, space group Pbcn, a = 11.242(3) Å, b = 16.963(4) Å, c = 13.898(4) Å, Z = 4 for 1 and monoclinic, space group C2/c, a = 18.887(4) Å, b = 10.761(2) Å, c = 14.488(3) Å, β = 126.100(3)°, Z = 4 for 2.