Temperature-controlled Structural Diversity of Two Cd(II) Coordination Polymers Based on the Dicarboxylate Ligand①

ABSTRACT Two new 3-D Cd(II) coordination polymers with p -phthalic acid ( p -BDC) and 4,4΄-dipyridylamine (4,4΄-dpa), namely [Cd 2 ( p -BDC) 2 (4,4΄-dpa) 2 ] n 1 and {[Cd( p -BDC)(4,4΄-dpa) (H 2 O)]·4H 2 O} n 2 were successfully synthesized under hydrothermal conditions at 120 and 140 °C. They were characterized by single-crystal X-ray diffraction, IR, PXRD and TGA . It was further characterized by Hirshfeld surface (HS) analysis for complex 2 . The luminescent properties of the complexes have also been investigated.