Luminescence of lanthanide complexes in nano anion exchangers

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Abstract

The possibility of using nanoanion exchangers as an organized medium for enhancing the luminescence of rare earth element complexes has been demonstrated for the first time. When a sol formed by anion exchanger nanoparticles is introduced into a solution containing thenoyltrifluoroacetone (TTA) and traces of europium(III) or samarium(III) salts, TTA anions concentrate in the ionite phase and bind rare earth cations into negatively charged complexes, which is accompanied by an increase in luminescence intensity by three orders of magnitude.

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About the authors

M. V. Koroleva

V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences

Email: olenin@geokhi.ru
Russian Federation, 119991, Moscow

V. V. Yagov

V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences

Email: olenin@geokhi.ru
Russian Federation, 119991, Moscow

A. Yu. Olenin

V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences

Author for correspondence.
Email: olenin@geokhi.ru
Russian Federation, 119991, Moscow

A. M. Dolgonosov

V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences

Email: olenin@geokhi.ru
Russian Federation, 119991, Moscow

R. Kh. Khamizov

V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences

Email: olenin@geokhi.ru
Russian Federation, 119991, Moscow

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Supplementary files

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2. Scheme 1. Reaction of the OH form of NIA with an aqueous solution of TTA.

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3. Fig. 1. Excitation (curve 1, λlum = 613 nm) and luminescence (curve 2, λexc = 360 nm) spectra of aqueous solutions containing 40 μM Eu(III) and 400 μM TTA in the absence of NIA (a) and in the presence of 50 μM NIA (b).

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4. Scheme 2. Equilibrium of the complexation reaction in the NIA–TTA–Eu3+ system.

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5. Fig. 2. Excitation (curve 1, λlum = 647 nm) and luminescence (curve 2, λexc = 380 nm) spectra of aqueous solutions containing 50 μM Sm(III) and 2 mM TTA in the presence of 250 μM NIA.

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6. Fig. 3. Dependence of luminescence intensity on the concentration of Eu(III) and Sm(III). Conditions for Eu(III): λexc = 360 nm, λlum = 613 nm, 0.4 mM TTA and 50 μM NIA; for Sm(III): λexc = 380 nm, λlum = 647 nm, 2 mM TTA and 250 μM NIA.

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