Luminescence of europium (III) complexes for visualization

Olga A. Kolontaeva; Mikhail V. Pozharov; Vladimir F. Korolovich; Anastasia R. Khokhlova; Anna N. Kirdyanova; Natalia A. Burmistrova; Tamara V. Zakharova; Irina Yu. Goryacheva

doi:10.1117/12.2229738

21 April 2016 Luminescence of europium (III) complexes for visualization

Olga A. Kolontaeva, Mikhail V. Pozharov, Vladimir F. Korolovich, Anastasia R. Khokhlova, Anna N. Kirdyanova, Natalia A. Burmistrova, Tamara V. Zakharova, Irina Yu. Goryacheva

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Proceedings Volume 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS); 99171A (2016) https://doi.org/10.1117/12.2229738
Event: Saratov Fall Meeting 2015, 2015, Saratov, Russian Federation

Abstract

With the purpose to develop bright non-toxic luminescent label for theranostic application we have studied complexation of lanthanide dipicolinates (2,6-pyridinedicarboxylates) by sodium alginate and effect of thermal exposure of synthesized micro-capsules on their luminescent properties. Synthesized micro-capsules are stable in acidic medium but dissolve at pH ~ 4 due to transformation of cationic europium dipicolinate complex to anionic. Luminescence studies have shown that emission spectra of europium(III)-alginate complexes (both chloride and dipicolinate) contain two intensive bands characteristic to Eu³⁺ ion (⁵D₀ → ⁷F₁ (590 nm) and ⁵D₀ → ⁷F₁ (612 nm)). We have also found that at 160ºC europium(III)- alginate micro-capsules decompose to black, soot-like substance, therefore, their thermal treatment must be performed in closed environment (i.e., sealed ampoules).

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Olga A. Kolontaeva, Mikhail V. Pozharov, Vladimir F. Korolovich, Anastasia R. Khokhlova, Anna N. Kirdyanova, Natalia A. Burmistrova, Tamara V. Zakharova, and Irina Yu. Goryacheva "Luminescence of europium (III) complexes for visualization", Proc. SPIE 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS), 99171A (21 April 2016); https://doi.org/10.1117/12.2229738

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