Poly[aqua-(μ(2)-oxalato)(4-oxidopyri-din-ium)erbium(II)].

Area of Science:

• Inorganic Chemistry
• Materials Science
• Crystallography

Background:

• Coordination polymers offer tunable properties based on metal ions and organic ligands.
• Erbium complexes are of interest for their luminescent and magnetic properties.
• Polymeric structures can exhibit unique supramolecular architectures and interactions.

Purpose of the Study:

• To synthesize and characterize a new erbium-based coordination polymer.
• To investigate the structural features and bonding in the novel complex.
• To explore the supramolecular assembly of the polymer.

Main Methods:

• Single-crystal X-ray diffraction was used to determine the crystal structure.
• Infrared spectroscopy was employed for ligand and complex characterization.
• Analysis of intermolecular interactions, including hydrogen bonding and pi-pi stacking, was performed.

Main Results:

• A new erbium polymer, [Er(C5H5NO)(C2O4)(H2O)]n, was successfully synthesized.
• The structure features a distorted square-antiprismatic coordination geometry around the Er(II) center.
• Oxalate ligands bridge Er(II) ions, forming layers stabilized by hydrogen bonding and pi-pi stacking interactions between 4-oxidopyridinium rings.

Conclusions:

• The study presents a novel 3D supramolecular network of an erbium-oxalate polymer.
• The crystal structure reveals intricate coordination and intermolecular interactions.
• The findings contribute to the understanding of designing complex inorganic polymer architectures.