Highly photoluminescent Eu(III) complexes of the new 1-triphenylen-2-yl-3-trifluoroacetylacetone

Pietraszkiewicz, Oksana; Mal, Suraj; Pietraszkiewicz, Marek; Maciejczyk, Michał; Czerski, Igor; Borowiak, T.; Dutkiewicz, Grzegorz; Drobchak, Oksana; Penninck, Lieven; Beeckman, Jeroen; Neyts, Kristiaan

doi:10.1016/j.jphotochem.2012.10.003

Cited by 21 publications

(8 citation statements)

References 44 publications

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“…and that catalytic amounts of the phosphine oxides activated the catalytic Mannich reaction [129]. A series of lanthanide complexes of the anionic ligand (58) [130]. The structures show that (58) adopts both PO, PO and PO, N chelating modes shown in Fig.…”

Section: Complexes With Miscellaneous Lanthanide Saltsmentioning

confidence: 99%

Lanthanide phosphine oxide complexes

Platt

2017

Coordination Chemistry Reviews

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Phosphine oxide complexes of lanthanide metal have been studied to elucidate the fundamental aspects of their structural chemistry and to develop important technological applications mainly in the reprocessing of nuclear fuels and in photoluminescent devices but also in other fields such as gas sorption and homogeneous catalysis. The aim of this review is to give an overview of the range of complexes with phosphine oxides and trivalent lanthanide and yttrium ions, their structural features and applications.

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Section: Complexes With Miscellaneous Lanthanide Saltsmentioning

confidence: 99%

Lanthanide phosphine oxide complexes

Platt

2017

Coordination Chemistry Reviews

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“…We are grateful to the Center for Instrumental Analysis, Kyushu Institute of Technology (KITCIA) for the electron impact mass, 1 HNMR spectra and X-ray analysis. This research was financially supported by JSPS KAKENH Grant Number 15K05611…”

Section: Acknowledgementsmentioning

confidence: 99%

“…The luminescent properties europium complexes have been of great interest because of their high luminescence emission efficiency, long fluorescence life time, large stokes shift, sharp emission bands [1] [2] [3]. Therefore, various europium complexes with various organic ligands have been investigated for decades and still the search for novel europium complexes has been attracting many researchers due to the important applications of these complexes as optical fiber lasers, electroluminescent displays and organic light emitting diodes [4] [5] [6].…”

Section: Introductionmentioning

confidence: 99%

Syntheses, Crystal Structure and Photoluminescence Properties of Piperidinium Tetrakis (1,3-Diphenyl-1,3-Propanedionato) Europate(III) Complex and Its Two Different Crystals

Moriguchi¹,

Kitou²,

Yakeya³

et al. 2017

CSTA

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Treatment of 1,3-diphenyl-1,3-propanedione 1a with europium (III) chloride in the presence of piperidine results in the halide ligands exchange giving newly piperidinium tetrakis (1,3-diphenyl-1,3-propanedionato)europate(III) complex 2a. The complex was characterized by 1 H-NMR, positive FAB-mass, and Elemental Analysis. The exact molecular structure of 2a was determined by single crystal X-ray diffraction with the monoclinic space group Cc (centrosymmetric, No.13). The large cavity sizes of the complex 2a facilitated the inclusion of water and benzene solvate molecules. The other two different crystals 2b, 2c having two water molecules and one benzene molecule were obtained by the crystallization in different solvents and the exact molecular structures were determined by single crystal X-ray diffraction analysis with space groups P2 1 /n (centrosymmetric, No.14), and P2 1 /n (centrosymmetric, No.14), respectively. The eight coordinate structures of the complexes in the three crystals were slightly different due to the crystal packing and the existence of the solvent molecule(s). The photoluminescence studies indicated that four β-diketone ligands acted as strong antenna ligands and transferred the absorbed energy to europium (III) ion, consequently red luminescence was observed. These strong emissions were attributed to the

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“…Although the luminescence of the europium ion can be efficient, the ion suffers from weak light absorption, because the electric‐dipole f–f transitions that result in light emission from the europium ion are parity‐forbidden, in spite of the opposite‐parity‐allowed magnetic‐dipole f–f transitions . One way to overcome the problem of the weak f–f absorption transition of the europium ion and to achieve bright emission is to surround the ion with adequate organic ligands able to harvest light and to subsequently transfer the electronic energy to the metal‐ion excited states, while simultaneously providing a rigid protective coordination shell for minimizing nonradiative deactivation , , . This indirect excitation process is known as the antenna effect or sensitization .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structure, Photoluminescence, and Electroluminescence of Four Europium Complexes: Fabrication of Pure Red Organic Light‐Emitting Diodes from Europium Complexes

et al. 2017

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Four new europium complexes were prepared by treating europium(III) trifluoro(thenoyl)acetonate trihydrate with new tridentate ligands, based on dipyrazolyltriazine and utilized as emitting materials in electroluminescent devices. The complexes were characterized by elemental analysis, FTIR spectroscopy, UV/Vis spectrophotometry, and 1H NMR spectroscopy. The coordinated ligands serve as light‐harvesting chromophores in the complexes, with absorption maxima in the range 334–402 nm [ε = (8.9–81.4) × 103 m–1 cm–1]. The ligands efficiently sensitize europium luminescence, with maximum quantum‐yield (QLEu) and observed lifetime (τobs) values of 34 % and 600 µs in the solid state and 35 % and 528 µs in toluene, respectively. The radiative lifetimes of Eu (5D0) are in the range 1170–1281 µs and the ligand‐to‐metal energy‐transfer efficiency (ηsens) is in the range 71–92 % for those complexes in the solid state and in the range 68–97 % for those in solution. Additionally, organic light‐emitting diodes (OLEDs), which exhibited pure red emission, were fabricated with europium(III) complexes. It is shown that by modifying the [Eu(tta)3·3H2O] molecule with ancillary ligands, one can tune and control its electroluminescence spectra, along with its electrical properties, such as the current/voltage characteristics of OLED devices based on [Eu(tta)3(L)]. The best OLED presented a maximum luminance of 3156 cd/m2 and a maximum efficiency of 0.7 cd/A at an applied voltage of 8 V.

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Highly photoluminescent Eu(III) complexes of the new 1-triphenylen-2-yl-3-trifluoroacetylacetone

Cited by 21 publications

References 44 publications

Lanthanide phosphine oxide complexes

Lanthanide phosphine oxide complexes

Syntheses, Crystal Structure and Photoluminescence Properties of Piperidinium Tetrakis (1,3-Diphenyl-1,3-Propanedionato) Europate(III) Complex and Its Two Different Crystals

Synthesis, Structure, Photoluminescence, and Electroluminescence of Four Europium Complexes: Fabrication of Pure Red Organic Light‐Emitting Diodes from Europium Complexes

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