Managing the luminescence efficiency of the organic compounds of europium(III) through preparation technology

Bordian, Olga; Verlan, V. I.; Culeac, I.; Bulhac, I.; Zubarev, V. E.

doi:10.1117/12.2571186

Cited by 3 publications

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“…Ligands and host matrices act as an "antenna" to absorb the external excitation light and transfer this excitation energy to the Eu 3+ ion levels, from which the radiating excited levels can be populated [3]. In the present work we extend our previous study on the complexes Eu(TTA) 3 (Ph 3 PO) 2 [5,6] and [Eu(µ 2 -OC 2 H 5 )(btfa)(NO 3 )(phen)] 2 •phen) [7,8] by extending the temperature range of PL measurements to 10.7-300 K. The main attention is focused on the influence of temperature on the PL intensity and on the characteristic quantum parameters of PL: the integral intensity of PL, the emission probability, the position of the center of gravity of the radiative transition, the PL efficiency, etc. The most pronounced is the analysis of these parameters and their comparison in the mononuclear compound with the corresponding parameters in the dinuclear compound to highlight and optimize the coordinating compounds based on the Eu 3+ ion.…”

Section: Introductionmentioning

confidence: 62%

Photoluminescence properties of new dinuclear [Eu(μ2-OC2H5)(btfa)(NO3)(phen)]2phen and mononuclear Eu(TTA)3(Ph3PO)2 complexes

Verlan¹,

Culeac²,

Bordian³

et al. 2023

Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI

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A new dinuclear complex Europium(III) bis[(μ2-ethoxy)(benzoyl trifluoroacetonato)(nitrate) (1,10-phenanthroline) europium(III)]2 1,10-phenanthroline, here after [Eu(μ2-OC2H5)(btfa)(NO3)(phen)]2·phen)(1) (Figure 1a) and the mononuclear complex Eu(TTA)3(Ph3PO)2() (Figure 2a) were synthesized and characterized by photoluminescence (PL) spectroscopy. The PL emission spectra of the powder samples of the compounds were recorded in the temperature range 10.7 – 300 K. Both complexes show rare metal-centered luminescence in the energy range characteristic of the Eu3+ ion (580 – 710 nm) with emission bands according to ion selection rule. The emission bands in the PL are attributed to the internal 4f → 4f radiative transitions of the Eu3+ ion 5D0 → 7Fi (i = 0→4) and, in addition, to the splitting of each level caused by the influence of the electric field of the ligands of the complex. Due to the splittings, each level is divided into 2i+1 sublevels, which are well observed in the mononuclear compound 2 centered at 580, 595, 615, 650, and 698 nm. However, in the PL spectrum of the dinuclear compound, the splits show a double number of splits (2(2i + 1)), which indicates the presence of two positions of the Eu3+ ion in the molecule and which are not optically equivalent.

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Section: Introductionmentioning

confidence: 62%

Photoluminescence properties of new dinuclear [Eu(μ2-OC2H5)(btfa)(NO3)(phen)]2phen and mononuclear Eu(TTA)3(Ph3PO)2 complexes

Verlan¹,

Culeac²,

Bordian³

et al. 2023

Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI

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Photoluminescence Properties of Eu(TTA)3(Ph3PO)2

et al. 2022

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Synthesis and Characterization of Coordination Compound [Eu(µ2-OC2H5)(btfa)(NO3)(phen)]2phen with High Luminescence Efficiency

et al. 2022

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A high-luminescent, blue-light excitable europium(III) coordination complex, [Eu(µ2-OC2H5)(btfa)(NO3)(phen)]2phen (1) {btfa = benzoyl trifluoroacetone, phen = 1,10-phenantroline}, has been synthesized and investigated. The complex was characterized by infrared (IR) and photoluminescence (PL) spectroscopy. The PL emission spectra of powder samples registered in a range of 10.7–300 K exhibit characteristic metal-centered luminescence bands, assigned to internal radiative transitions of the Eu3+ ion, 5D1→7Fj and 5D0→7Fj (j = 0–4). The high-resolution spectrum of the transition 5D0→7F0 shows that it consists of two narrow components, separated by 0.96 meV, which indicates the presence in the matrix of two different sites of the Eu3+ ion. The splitting pattern of 5D0→7Fj (j = 0–4) transitions indicates that europium ions are located in a low-symmetry environment. The absolute quantum yield and the sensitization efficiency were determined to be 49.2% and 89.3%, respectively. The complex can be excited with low-cost lasers at around 405 nm and is attractive for potential applications in optoelectronics and biochemistry.

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Managing the luminescence efficiency of the organic compounds of europium(III) through preparation technology

Cited by 3 publications

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Photoluminescence properties of new dinuclear [Eu(μ2-OC2H5)(btfa)(NO3)(phen)]2phen and mononuclear Eu(TTA)3(Ph3PO)2 complexes

Photoluminescence properties of new dinuclear [Eu(μ2-OC2H5)(btfa)(NO3)(phen)]2phen and mononuclear Eu(TTA)3(Ph3PO)2 complexes

Photoluminescence Properties of Eu(TTA)3(Ph3PO)2

Synthesis and Characterization of Coordination Compound [Eu(µ2-OC2H5)(btfa)(NO3)(phen)]2phen with High Luminescence Efficiency

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