Three Cd(II) coordination polymers assembled by flexible 2,2′-azodibenzoic acid and N-donor auxiliary ligand: Structural diversities and luminescent properties

摘要: Abstract Hydrothermal reactions of Cd(OAc)2 · 2H2O with 2,2′-azodibenzoic acid (H2L) and three N-donor ancillary ligands in MeOH/H2O at 120 °C gave rise to cadmium(II) coordination polymers [CdL(bpy)]n (1), {[Cd4L4(bpe)(H2O)2] · 2H2O}n (2) [CdL(bpp)]n (3) [bpy = 4,4′-bipyridine, bpe = 1,2-bis(4-pyridyl)ethylene, bpp = 1,3-bis(4-pyridyl)propane]. Structural analysis reveals that compound 1 possesses a novel three-fold interpenetrating diamondoid framework constructed by linking Cd centers L pillared bpy ligands. Compound 2 comprises 3D network rare Schlafli symbol (446581)(4462), the structure is built from 2D [CdL2]n nets bpe 3 exhibits same 66 topology 1. Such architecture contains 1D helical [Cd(bpp)]n chains [CdL]n along axis b axis, respectively. The structural differences among 1–3 indicate have significant effects on formation final architectures. Photoluminescent properties solid state were also investigated.