Relationship between the analytical properties of lanthanide(III) β-diketonates and the nature of ligands

• Published in: Journal of analytical chemistry (New York, N.Y.) Vol. 55; no. 2; pp. 102 - 108
• Main Authors: MESHKOVA, S. B, KUZ'MIN, V. E, SHAPIRO, Yu. E, TOPILOVA, Z. M, YUDANOVA, I. V, BOL'SHOI, D. V, ANTONOVICH, V. P
• Format: Journal Article
• Language: English
• Published: New York, NY Kluwer/Plenum 01-02-2000; Springer Nature B.V
• Subjects: Charge distribution; Chemistry; Diketones; Energy transfer; Exact sciences and technology; General and physical chemistry; Hydrophobicity; Ligands; Luminescence; Mathematical analysis; NMR spectroscopy; Optical properties; Rare earth elements; Solution properties; Solutions; Ligand effect; Structure effect; Load distribution; Ytterbium Complexes; Chain length; Conformational analysis; Organic ligand; Partition coefficient; Review; Diketone; Hydrophobicity; Organic solvent; Luminescence quenching; Europium Complexes; Surface tension; Aqueous solution; Lanthanide Complexes; Physicochemical properties
• ISSN: 1061-9348; 1608-3199
• DOI: 10.1007/BF02757732

The effect of the nature of β-diketones on the spectrochemical-luminescence properties of lanthanide complexes used as analytical forms for the highly sensitive determination of some rare-earth elements was examined. NMR spectroscopy, molecular mechanics, calculations, and an experimental evaluation of the hydrophobicity of the test β-diketones indicated that an increase in the intensity, quantum yield, and lifetime of luminescence of lanthanide (Ln) β-diketonates depends on the charge distribution in the chelate ring, on the spatial structure, and on the hydrophobicity of the coordinated ligand. These factors determine the efficiency of energy transfer from the β-diketone to the Ln+3 ion and the decrease in energy losses caused by the quenching action of water molecules.