Détermination de constantes de formation des complexes phosphorescents du bore avec la benzoylacétone, à l'aide de durées de vie moyenne d'émission

✍ Scribed by G. Gamba; M. Marcantonatos

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: German
• Weight: 271 KB
• Volume: 54
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19710540537

✦ Synopsis

Abstract

A method, based on mean life times (τ) of T → S emission, is proposed for the determination of stability constants of two successive mononuclear complexes and is applied to the boric acid‐benzoylacetone AB et AB~2~ phosphorescent complexes in glassy (77 K) ether‐concentrated sulfuric acid media. Results show that this method ‐ if not limited by very near τ values of the complexes – is precise and applicable even to cases where, at high ligand concentrations, filter effects intervene. The use of τ values by this procedure offers, over colorimetric and fluorometric methods, enhanced possibilities to determine the type of complexes formed and their stability.