Synthesis, crystal structure, fluorescence properties of 1D chain Manganese (II) and Cadmium (II) complexes

• Double chain structure Mn(II) complex (1) and zigzag chain structure Cd(II) complex (2) were synthesized.
• The conformations of ligand affected structural diversity.
• The solution of Cd(II) complex (2) can sense for I− anion by quenched fluorescence intensity.

Two complexes, {[Mn(3-pmpmd)2(Cl)2]·2H2O}n(1), {[Cd(3-pmpmd) (I)2]·CHCl3·H2O}n(2), (3-pmpmd, N,N′-bis(3-pyridylmethyl)pyromellitic diimide) were synthesized and characterized by elemental analyses, IR spectroscopy, thermogravimetric analyses, and X-ray single-crystal structure analysis. The conformations of 3-pmpmd ligand affect their structural diversity. Complex 1 is a 1D double chain structure in edge-to-edge arrangement by π ⋯ π interactions. Complex 2 is a typical 1D zigzag chain structure arranged in a parallel array containing 1D channel to accommodate the chloroform and water guest molecules. Thermal stabilities and fluorescence properties of both complexes were investigated. The solution of complex 2 in DMF can sense for I− anion by quenching fluorescence intensity, whereas other anions increasing fluorescence intensity.

Graphical AbstractDouble chain structure complex (1) and zigzag chain structure complex (2) were synthesized. The conformations of ligand affected their structural diversity. Thermal stabilities and fluorescence properties of both complexes were investigated. The solution of complex 2 can sense for I− anion by quenched fluorescence intensity.Figure optionsDownload high-quality image (163 K)Download as PowerPoint slide