Luminescent properties of new polymer metal complexes based β-diketones and REE

Savchenko, I. A.; Berezhnytska, Оleksandra; Fedorov, Yaroslav; Smola, S. S.; Trunova, Elena

doi:10.1080/15421406.2019.1578493

Cited by 10 publications

(4 citation statements)

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“…The samarium complexes showed emission peaks at ~566, 608, 648, and 710 nm that were attributed to the transition from 4 G 5/2 to 6 H J (J: 5/2–11/2), separately. [ 46–48 ] Orange‐red luminescence was observed for all the complexes with the most intense peak corresponding to the 4 G 5/2 → 6 H 9/2 transition, which was electric dipole in nature and depended on the coordination environment of ligands. [ 49–51 ] A ligand‐based band was observed in the emission spectra of Sm3 and Sm4 when recorded in the chloroform solvent.…”

Section: Resultsmentioning

confidence: 99%

Mononuclear luminous β‐diketonate Ln(III) complexes with heteroaromatic auxiliary ligands: synthesis and luminescence characteristics

et al. 2022

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A series of lanthanide (samarium and terbium) β‐diketonates with heteroaromatic auxiliary ligands was synthesized. The prepared complexes were characterized through electrochemical, thermal, and spectroscopic analyses. Infrared analysis revealed the binding of the respective metal ion to oxygen and nitrogen atoms of diketone and ancillary ligands. Thermogravimetry/differential thermogravimetry profiles provided thermal information and specified the high thermal stability of the prepared complexes. The complexes exhibited the sharp and structured Ln‐based emission in the visible region upon irradiation in the ultraviolet range. Photophysical analysis demonstrated the green and orange‐red emission due to the respective characteristic transitions of Tb3+ and Sm3+ ions. Photophysical properties affirmed the luminous behaviour of the synthesized complexes. These luminous lanthanide complexes could be used as emitting materials in the design of organic light‐emitting diodes.

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Section: Resultsmentioning

confidence: 99%

Mononuclear luminous β‐diketonate Ln(III) complexes with heteroaromatic auxiliary ligands: synthesis and luminescence characteristics

et al. 2022

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“…Polymerization was carried out at 80° C in a DMF solution at a monomer (tris-diketone) concentration of 0.3 mol/dm 3 and an AIBN initiator concentration of 0.003 mol/dm 3 . The obtained metal polymers were precipitated from solutions with isopropanol [26,38].…”

Section: Inorganic Chemistrymentioning

confidence: 99%

“…The presence of a final double bond in the ligand molecule makes it an active monomer in polymerization reactions. Thus, metal complexes based on unsaturated β-diketones are active monomers in free radical polymerization reactions [38,39].…”

Section: Introductionmentioning

confidence: 99%

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THE COORDINATION COMPOUNDS Gd (III) AND Dy(III) WITH SOME β-DIKETONES

Berezhnytska¹,

Rohovtsov²,

Horbenko³

et al. 2021

Ukr. Chem. Journ.

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New complexes of Dy (III) and Gd (III) with b-diketones containing unsaturated and aryl substituents were synthesized. Metal polymers based on synthesized complexes were obtained by the method of radical polymerization. The composition and structure of synthesized complexes and metal polymers are established. It is shown that during polymerization the coordination environment of the central ion remains unchanged. The spectral-luminescent characteristics of the synthesized compounds were studied. The presence of water molecules in the immediate coordination environment causes a low intensity of emission of monomeric dysprosium complexes. In the luminescence spectra of metal polymers, there are bands magnetic dipole transition (4F9 → 6H15/2) and electric dipole transition (4F9 → 6H13/2). The close energies of the triplet level of the ligand and the resonant level of the dysprosium ion cause low emission characteristics of the synthesized dysprosium complexes.

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