Studies on Synthesis and Fluorescence Spectra of New Europium Complex with an Amide-Based Tripod-Type Compound

摘要

The development of luminescent chemical probes and sensors is the subject of intensive research,both in natural [1] and medical sciences [2].The design of complexes of Ln(III) ions with encapsulating ligands is an important theme in the field of supramolecular chemistry because it offers the possibility to obtain stable luminescent compounds.A relevant aspect of this research consists in the possibility to optimize the luminescence properties of the metal ion by a suitable choice of ligand [3].One of the most important methods,that can increase the complex fluorescence intensity,is to design and synthesize a ligand that can form stable complex with Ln(III) ions and protect the metallic site from attacking by solvent molecules [4].Recently,the amide-based tripod-type compounds have been widely studied in the energy transfer between ligands and Ln(III) ions.The probes based on Eu(III) ions are of special interest because of the particularly suitable spectroscopic properties [5].