Synthesis, characterisation by infrared spectroscopy, X-ray diffraction, TGA/DSC of coordination polymers and the study of their photo-luminescent properties

Abstract

This manuscript presents the successful synthesis and characterization of seven series of coordination polymers constructed from lanthanide ions in combination with isophthalic acid and pimelic acid as organic linkers. Among the synthesized compounds, four series (Series 1- 4) are newly reported compounds that, to the best of our knowledge, have not previously appeared in the literature. The remaining series (Series 5-7) correspond to known structures obtained with different lanthanide ions. Comprehensive characterization was carried out using infrared (IR) spectroscopy, powder Xray diffraction (PXRD), and thermal analysis. IR spectroscopy confirmed the coordination of isophthalate and pimelate ligands to the metal centers. PXRD analyses revealed the isostructurality, phase purity, and crystallinity of the synthesized compounds, while thermal studies demonstrated their multi-step decomposition behaviour. Photoluminescence studies conducted in the visible range on selected compounds showed promising emission properties, highlighting their potential use in optical or sensing applications. The findings contribute to the growing body of knowledge on lanthanide-based coordination polymers and their functional properties