Eight Zn() and Cd() complexes based on the aromatic C-centered triangular multicarboxylate and N-donor mixed ligands

Eight new Zn( ii ) and Cd( ii ) complexes based on the aromatic multicarboxylate and N-donor mixed ligands, namely Zn 2 (TCOPM)(2,2′-bipy)(OH)·1.25DMF (TCOPM = tris( p -carboxyphenyl)methane; 2,2′-bipy = 2,2′-bipyridine; DMF = N , N ′-dimethylformamide) ( 1 ), Zn 2 (α OH -TCOPM)(phen)(OH)·DMF (α OH -TCOPM = tris( p -carboxyphenyl)methanol; phen = 1,10-phenanthroline) ( 2 ), Zn 2 (α OH -TCOPM)(tpy)(OH)(H 2 O) (tpy = 2,2′:6′,2′′-terpyridine) ( 3 ), Zn 3 (α OH -TCOPM) 2 (dpe)·2H 2 O (dpe = 4,4′-vinylenedipyridine) ( 4 ), Cd 3 (TCOPM) 2 (DMF) 2 (H 2 O) 2 ( 5 ), Cd 3 (TCOPM) 2 (4,4′-bipy) ( 6 ), Cd 3 (TCOPM) 2 (dpe) ( 7 ), and Cd 3 (α OH -TCOPM) 2 (2,2′-bipy) 2 ·2DMF ( 8 ) were synthesized through a solvothermal reaction. The α OH -TCOPM ligand is generated in situ by the nucleophilic addition of the TCOPM ligand. X-ray crystallographic analysis reveals that complexes 1-3 , 5 , and 8 exhibit a two-dimensional (2D) layered structure, while 4 , 6 , and 7 possess a 3D open framework. The coordination mode of TCOPM and the type of N-donors ligands have obvious effects on the final structures. The luminescence properties in the solid state of 1-4 , 7 , and 8 were also investigated. Eight Zn( ii ) and Cd( ii ) complexes based on the C-centered triangular multicarboxylate and N-donor mixed ligands were synthesized. The coordination mode of ligands have obvious effects on the final structures. Luminescent properties were investigated.