Solvothermal syntheses, crystal structures and luminescence properties of Zn(II) coordination compounds based on imidazophenanthroline carboxylate derivative ligand

Abstract Four new zinc(II) coordination compounds, [Zn 2 (Hcpip) 4 ]·8H 2 O ( 1 ), [Zn 4 (Hcpip) 4 (1,3-bdc) 2 ] n ·5 n H 2 O ( 2 ), [Zn(Hcpip)(1,4-bdc) 0.5 ] n ( 3 ), [Zn 2 (Hcpip) 2 (H1,3,5-btc)] n ·2 n H 2 O ( 4 ), (H 2 cpip = 2-(2-carboxyphenyl)imidazo[4,5-f]1,10-phenanthroline, H 2 (1,3-bdc) = benzene-1,3-dicarboxylic acid, H 2 (1,4-bdc) = benzene-1,4-dicarboxylic acid, H 3 (1,3,5-btc) = benzene-1,3,5-tricarboxylic acid) have been synthesized under solvothermal conditions and characterized by elemental analysis, IR and single crystal X-ray diffraction. Compound 1 is a dinuclear molecular structure, and further linked by π … π interactions to form a 2D supramolecular layer. Compounds 2 – 4 display different 2D layer structures with 1D chains and aromatic carboxylate ligands. In addition, their luminescence properties and thermal stabilities have been investigated.