A novel, promising ligand for luminescent lanthanide complexes tris-((4-(3-methyl-1-phenyl-5- pyrazolonyl)-phenylmethylidene)-2-aminoethyl)amine (trenPMBP) was prepared and used as effective "antenna" for the ligand-sensitized photoluminescence of Tb3+, Dy3+ and Sm3+ ions. All the complexes show surprisingly intensive photoluminescence in comparison with their simple 4-benzoyl-3-methyl-1- phenyl-5-pyrazolone analogues. One of the reasons of such result can be a relatively high located triplet energy level of trenPMBP around 22675cm-1, which properly fits with the emissive energy levels of Tb3+ and Dy3+ (20430cm-1 and 20830cm-1, respectively), thus avoiding back-energy transfer from the lanthanide to the ligand.
Solid state photoluminescence of novel lanthanide complexes based on 4-benzoylpyrazolone Schiff base
Accorsi Gianluca;
2010
Abstract
A novel, promising ligand for luminescent lanthanide complexes tris-((4-(3-methyl-1-phenyl-5- pyrazolonyl)-phenylmethylidene)-2-aminoethyl)amine (trenPMBP) was prepared and used as effective "antenna" for the ligand-sensitized photoluminescence of Tb3+, Dy3+ and Sm3+ ions. All the complexes show surprisingly intensive photoluminescence in comparison with their simple 4-benzoyl-3-methyl-1- phenyl-5-pyrazolone analogues. One of the reasons of such result can be a relatively high located triplet energy level of trenPMBP around 22675cm-1, which properly fits with the emissive energy levels of Tb3+ and Dy3+ (20430cm-1 and 20830cm-1, respectively), thus avoiding back-energy transfer from the lanthanide to the ligand.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
