Lanthanide complexes with aromatic o-phosphorylated ligands: synthesis, structure elucidation and photophysical properties

Shuvaev, Sergey; Utochnikova, Valentina V.; Marciniak, Ł.; Freidzon, Alexandra Ya.; Sinev, Ilya; Deun, Rik Van; Freire, Ricardo O.; Zubavichus, Yan V.; Grünert, Wolfgang; Kuzmina, Natalia

doi:10.1039/c3dt52600c

Cited by 44 publications

(26 citation statements)

References 68 publications

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“…8b) ] + ion signal was detected, confirming at least oligomeric structure of the complex, and more probably even polymeric, taking into account its very low solubility, as was found in [25].…”

Section: Maldi Spectroscopysupporting

confidence: 65%

Lanthanide complexes with 2-(tosylamino)benzylidene-N-benzoylhydrazone, which exhibit high NIR emission

et al. 2015

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New NIR emitting materials were found among the lanthanide complexes with 2-(tosylamino)benzylidene-N-benzoylhydrazone. Complexes of Nd(3+), Er(3+) and Yb(3+), as well as Eu(3+), Gd(3+) and Lu(3+), were synthesized for the first time. Owing to the absence of vibration quenching the ytterbium complex was found to exhibit a photoluminescence quantum yield of 1.4%. Since the sensitization efficiency was calculated to be 55%, the losses in the quantum yield are probably due to Yb-Yb resonant energy transfer.

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Section: Maldi Spectroscopysupporting

confidence: 65%

Lanthanide complexes with 2-(tosylamino)benzylidene-N-benzoylhydrazone, which exhibit high NIR emission

et al. 2015

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“…At the same time, the luminescence of Eu(pam) 3 (H 2 O) 4 could only be registered at low temperature. We assume that this is due to the presence of the ligand‐to‐metal charge transfer (LMCT) state in this complex, which is known to typically quench europium luminescence . We assume that the existence of such a state is possible only in the europium complex with (pam) – , since europium has a relatively stable oxidation state of +2, and the amino group in (pam) – is potentially capable of oxidation, as explained in the literature …”

Section: Resultsmentioning

confidence: 99%

Luminescence Enhancement by p‐Substituent Variation

et al. 2016

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The search for precursors of luminescent biomarkers is carried out among highly luminescent, stable, and soluble lanthanide p‐substituted fluorobenzoates, which were synthesized and thoroughly characterized. Examination of their crystal structure revealed the dependence of the structure on the lanthanide ion and on the separation method, because of the high acidity of the selected compounds. The brightness of the luminescence of the terbium and europium complexes varies significantly with both absorption and photoluminescence quantum yields (PLQYs), and the latter reaches 62 %.

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“…Among lanthanide coordination compounds, lanthanide aromatic carboxylates possess high PLQYs (e.g., 100 % for terbium benzoate8, 9, 10, 11) and are, therefore, of great interest in various luminescent applications. Until now, broad experience has been accumulated for the synthesis of the lanthanide aromatic carboxylates and the study of their luminescent properties, particularly in the visible spectral range 12. However, lanthanide aromatic carboxylates, including benzoate, are poorly soluble in water and organic media due to their polymeric structure,13 thus a strategy aimed at enhancing their solubility along with appropriate photophysical performance was implemented.…”

Section: Introductionmentioning

confidence: 99%

“…Until now,b road experience has been accumulatedf or the synthesis of the lanthanide aromatic carboxylates and the study of their luminescent properties, particularly in the visible spectralr ange. [12] However,l anthanide aromatic carboxylates, including benzoate,a re poorly soluble in water and organic media due to their polymerics tructure, [13] thus as trategy aimed at enhancingt heir solubility along with appropriate photophysical performancew as implemented.…”

Section: Introductionmentioning

confidence: 99%

Highly Luminescent, Water‐Soluble Lanthanide Fluorobenzoates: Syntheses, Structures and Photophysics, Part I: Lanthanide Pentafluorobenzoates

Kalyakina

Utochnikova

Бушмаринов

et al. 2015

Chemistry A European J

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Highly luminescent, photostable, and soluble lanthanide pentafluorobenzoates have been synthesized and thoroughly characterized, with a focus on Eu(III) and Tb(III) complexes as visible emitters and Nd(III) , Er(III) , and Yb(III) complexes as infrared emitters. Investigation of the crystal structures of the complexes in powder form and as single crystals by using X-ray diffraction revealed five different structural types, including monomeric, dimeric, and polymeric. The local structure in different solutions was studied by using X-ray absorption spectroscopy. The photoluminescence quantum yields (PLQYs) of terbium and europium complexes were 39 and 15 %, respectively; the latter value was increased almost twice by using the heterometallic complex [Tb0.5 Eu0.5 (pfb)3 (H2 O)] (Hpfb=pentafluorobenzoic acid). Due to the effectively utilized sensitization strategy (pfb)(-) →Tb→Eu, a pure europium luminescence with a PLQY of 29 % was achieved.

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Lanthanide complexes with aromatic o-phosphorylated ligands: synthesis, structure elucidation and photophysical properties

Cited by 44 publications

References 68 publications

Lanthanide complexes with 2-(tosylamino)benzylidene-N-benzoylhydrazone, which exhibit high NIR emission

Lanthanide complexes with 2-(tosylamino)benzylidene-N-benzoylhydrazone, which exhibit high NIR emission

Luminescence Enhancement by p‐Substituent Variation

Highly Luminescent, Water‐Soluble Lanthanide Fluorobenzoates: Syntheses, Structures and Photophysics, Part I: Lanthanide Pentafluorobenzoates

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