Hydrothermal synthesis, crystal structure, thermal and photoluminescent properties of Zn(II) and Cd(II) coordination polymers with 3-methyl-5-(pyridin-4-yl)benzoic acid

Abstract Two new coordination polymers, [Zn(mpba) 2 ] n ( 1 ) and [Cd(H 2 O)(mpba) 2 ] n ( 2 ), have been prepared by reactions of M(NO 3 ) 2 ·6H 2 O (M = Zn for 1 , Cd for 2 ) with an unsymmetric 3-methyl-5-(pyridin-4-yl)benzoic acid (Hmpba) under hydrothermal condition. Both complexes 1 and 2 were characterized by elemental analyses, FT-IR spectra and single-crystal X-ray diffraction analyses. Structural analyses reveal that complex 1 displays a 2D network with sql topology, while complex 2 exhibits a 3D framework with 2-fold interpenetrated cds topology. Furthermore, the thermal and photoluminescent properties of complexes 1 and 2 have also been investigated in the solid state.