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Article dans une revue
Luminescence of Trivalent Lanthanide Ions Excited by Single-Bubble and Multibubble Cavitations
Abstract : This article focuses on the possibility of exciting some lanthanides (Ce3+, Tb3+, Gd3+, and Eu3+) by ultrasound in aqueous solutions. Depending on the lanthanide ions and on the acoustic cavitation conditions (single-bubble or multibubble systems), the excitation mechanism is shown to be photoexcitation (e.g., for Ce3+) or collision-induced excitation (e.g., for Tb3+). The sonoluminescence of Tb3+ is studied in detail at various ultrasonic frequencies, allowing quantification of the amount of quenching. The latter is much stronger in sonoluminescence than in photoluminescence due to the particular properties of acoustic cavitation. Complexation with citrate ions enhances manifold sonoluminescence of lanthanides due to reduction of intra- and inner-molecular quenching.
https://hal.umontpellier.fr/hal-02001964
Contributeur : Magali Duvail Connectez-vous pour contacter le contributeur
Soumis le : jeudi 31 janvier 2019 - 14:23:10
Dernière modification le : mercredi 15 décembre 2021 - 10:00:03
Contributeur : Magali Duvail Connectez-vous pour contacter le contributeur
Soumis le : jeudi 31 janvier 2019 - 14:23:10
Dernière modification le : mercredi 15 décembre 2021 - 10:00:03