Cd(II) and Co(II) coordination polymers constructed from N,N'-Bis(3-pyridylmethyl)oxalamide and 1,4-Naphthalenedicarboxylic acid

Abstract

Hydrothermal reactions of N,N'-bis(3-pyridylmethyl)oxalamide (L) and 1,4-naphthalenedicarboxylic acid (1,4-NDC) with Cd(II) and Co(II) metal salts afforded {[Cd(L)(1,4-NDC)(H2O)]‧5H2O}n, 1, and {[Co2(L)2(1,4-NDC)2(H2O)4]‧3MeOH‧H2O}n, 2, which have been structurally characterized by using single crystal X-ray diffraction. Complex 1 forms a 1D looped chain with the (32)(3)-2,4C5 topology, while complex 2 shows a 3D framework with the (65.8)-cds topology, indicating that the structural diversity is subject to the metal identity. Moreover, complex 1 displays an emission at 361 nm upon excitation at 328 nm and complex 2 encapsulates a maximum of 403.90 mg g−1 at 60 °C on iodine adsorption. Weak interactions arising from NH/OH groups in complex 2 and iodine may govern the adsorption.