Near infrared light emission quenching in organolanthanide complexes

QUOCHI, FRANCESCO;Orrù R;Cordella F;MURA, ANTONIO ANDREA;BONGIOVANNI, GIOVANNI LUIGI CARLO;ARTIZZU, FLAVIA;DEPLANO, PAOLA;MERCURI, MARIA LAURA;PILIA, LUCA;SERPE, ANGELA

2006-01-01

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Abstract

We investigate the quenching of the near infrared light emission in Er3+ complexes induced by the resonant dipolar interaction between the rare-earth ion and high frequency vibrations of the organic ligand. The nonradiative decay rate of the lanthanide ion is discussed in terms of a continuous medium approximation, which depends only on a few, easily accessible spectroscopic and structural data. The model accounts well for the available experimental results in Er3+ complexes, and predicts an similar to 100% light emission quantum yield in fully halogenated systems.