Solvent-induced 1- and 2-D Cd(II) coordination polymers based on a bent polypyridyl ligand

Abstract Two Cd(II)-tppda (tppda =  N , N , N ′, N ′-tetrakis(2-pyridyl)-2,6-pyridinediamine) coordination polymers have been prepared via variations of the templating solvent. The solvated complex [Cd 2 (tppda)(DMF) 2 (μ-SCN) 2 (SCN) 2 ] n ( 1 ) exhibits a 1-D pseudo-helical structure, whereas the unsolvated complex [Cd 2 (tppda)(μ-SCN) 4 ] n ( 2 ) features a 2-D metal-organic framework (MOF). Both are luminescent in the solid state, with emission maxima 444 and 435 nm for 1 and 2 , respectively.