Controllable assembly of three [Cu2(COO)4]-based complexes using two as-synthesized aromatic tetracarboxylate linkers.

Three new complexes, namely, [Cu2(H2bdcpb)2(pyridine)2] (1), [Cu3(bdcpp)2(CH3NCH3)(H2O)] (2), and [Cu2(H2bdcpp)2(H2O)2]·2H2O (3), have been synthesized through the hydro/solvothermal reaction of cupric nitrate and lab-synthesized 1,3-bis(2′,4′-dicarboxylphenyl)benzene (H4bdcpb) or 2,6-bis(2′,4′-dicarboxylphenyl)pyridine (H4bdcpp) in the presence of different solvent systems. Isostructural complexes 1 and 3 show dinuclear [Cu2(COO)4] covalent modes with different coordinate solvent molecules. In complex 2, a two-dimensional covalent layer is generated from one-dimensional loop chains interconnected by [Cu2(COO)4] paddle-wheels. Structural analyses revealed that the framework stability of complexes 1–3 originated from molecular custom-designed [Cu2(COO)4] paddle-wheel units by symmetrical 2′,4′-dicarboxyl polyaromatic ligands. Three new complexes have been synthesized through the hydro/solvothermal reaction of cupric nitrate and two lab-synthesized polycarboxylates in the presence of different solvent systems. Among them, two isostructural complexes show dinuclear [Cu2(COO)4] covalent modes, while the other complex is a two-dimensional covalent layer. Structural analyses revealed that the framework stability of the complexes originated from molecular custom-designed [Cu2(COO)4] paddle-wheel units. [ABSTRACT FROM AUTHOR]