Syntheses and photoluminescence properties of new Zn(II) and Cd(II) coordination polymers prepared from 5-sulfoisophthalate ligand

摘要

New coordination polymers, formulated as {[Zn($mu $-sipH)($mu $-apim)]$cdot $3H$_{2}$O} $_{n}$ ( 1 ) and {[Cd($mu $-sip)(H$_{2}$O)$_{2}$ (apimH)]$cdot $3H$_{2}$O}$_{n}$ ( 2 ) were synthesized based on the 1-(3-aminopropyl)imidazole (apim) along with 5-sulfoisophthalate (sip) ligands. The complexes were synthesized under mild hydrothermal conditions. All the complexes were characterized by elemental analysis, FT-IR spectroscopy, and single-crystal X-ray diffraction studies. The X-ray crystallographic studies of 1 and 2 reveal Zn(II) and Cd(II) ions are $mu $-bridged by dianionic sipH and trianionic sip ligands in bis(monodentate) and bis(bidentate) coordination mode, respectively, to generate 1D polymer chains. In complex 1 , the adjacent chains are linked by two apim ligands to form a 1D nanotubular structure. Complex 2 is the first example of a protonated apimH ligand. In the complexes the adjacent 1D chains extend into a 3D supramolecular network by hydrogen bonds. The thermal decomposition behavior and photoluminescent property of the complexes are also discussed herein.