Spectroscopic properties of a new light-converting device Eu(thenoyltrifluoroacetonate)3 2(dibenzyl sulfoxide). A theoretical analysis based on structural data obtained from a sparkle model

Malta, O.L.; Brito, Hermi F.; Menezes, Jorge Fernando Silva de; Silva, F.R.Gonçalves e; Alves, Severino; Farias, Felipe; Andrade, Antônio V.M. de

doi:10.1016/s0022-2313(97)00107-5

Cited by 406 publications

(182 citation statements)

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“…Belian et al [48] have investigated the luminescent properties of Eu 3 þ complexes, in which the 1,10-phenanthroline (Phen) ligand was substituted at the 4 and 7 positions by chlorine atoms. Their intensity parameters were calculated using the model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 [196] and compared with experimental results. Molecular structures of the complexes and excited states were predicted using the Sparkle model and DFT method, and the INDO/S-CI model, respectively.…”

Section: Theoretical Methods and Methodologiesmentioning

confidence: 99%

Recent advances in lanthanide spectroscopy in Brazil

Silva

Capelo

Albuquerque

2016

Journal of Luminescence

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a b s t r a c tThis rev Q2 iew discusses recent advances in lanthanide spectroscopy involving luminescence applications carried out in Brazil. The revised topics include glasses, sol-gel, light-emitting diodes, nanoparticles, metal-organic frameworks, coordination polymers, thin films, energy transfer processes, upconversion and development of new theoretical tools. The important role played by Prof. Oscar L. Malta on this subject is evidenced by his many contributions to the broad range of investigations reported here and this review is dedicated to him, on the occasion of his 60th birthday.& 2015 Published by Elsevier B.V.

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Section: Theoretical Methods and Methodologiesmentioning

confidence: 99%

Recent advances in lanthanide spectroscopy in Brazil

Silva

Capelo

Albuquerque

2016

Journal of Luminescence

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“…To estimate the strength of crystal field in the complex, we calculated the Judd-Ofelt parameter Ω 2 which is more sensitive to the symmetry and sequence of ligand fields. According to the Judd-Ofelt theory [15], the spontaneous emission probability of an electric dipole transition between initial J manifold |(S, L) J > to terminal manifold |(S′, L′) J′ > is given by…”

Section: Judd-ofelt Analysisof Eu(c 2 F 5 Coo) 3 $Phenmentioning

confidence: 99%

Synthesis and optical properties of europium pentafluoropropionate 1,10-phenanthroline complex and its silica glass

She

2011

Front. Optoelectron. China

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Europium pentafluoropropionate 1,10-phenanthroline complex, Eu(C 2 F 5 COO) 3 $Phen (Phen = 1,10-phenanthroline), were synthesized and characterized by elemental analysis, Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) spectroscopy and thermogravimetric analysis (TA). At the same time, its silica glass was synthesized by in situ processes. The excitation spectra of the complex demonstrate that the energy collected by "antenna ligands" was transferred to Eu 3+ ions efficiently. The room-temperature PL spectra of the complexes are composed of the typical Eu 3+ ions red emission, due to transitions between 5 D 0 ! 7 F J(J = 0 ! 4) . The decomposition temperature of the complex was 290°C, which indicates the host complex is quite stable to heat. Then the affection of anneal temperatures on PL properties of SiO 2 glass were studied. The PL intensity of the SiO 2 glass annealed at 160°C was higher than other annealed temperatures for 24 h in air.

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“…In order to gain insight into the factors that determine the quantum yield and other relevant properties of lanthanide complexes our group has been investigating the photophysical properties of a number of new lanthanide complexes, using an approach based upon both theoretical and experimental work [8][9][10][11][12][13][14][15][16][17]. The results have shown that the quantum yield of a lanthanide complex arises from a balance among the rates of several processes, e.g., ligand to Ln 3+ energy transfer, multiphonon relaxation, energy back-transfer, crossover to charge-transfer states, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The results have shown that the quantum yield of a lanthanide complex arises from a balance among the rates of several processes, e.g., ligand to Ln 3+ energy transfer, multiphonon relaxation, energy back-transfer, crossover to charge-transfer states, etc. The control of these rates, as well as of other relevant physical properties, has been accomplished by a thorough selection of ligands, allowing us to develop some promising LCMDs [8,[11][12][13][14][15], with high quantum yields at room temperature, leading to new applications [6,7]. We are now reporting the synthesis, spectroscopic, X-ray characterization, and photophysical investigation, as well as the molecular and electronic structure prediction with emphasis on the ligand-centered triplet energy level of the lanthanide complexes Ln(tan) 3 …”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental photophysical studies of the tris(4,4,4-trifluoro-1-(1-naphthyl)-1,3-butanedionate) (2,2′-bipiridyl)-europium(III)

Nova

Batista

Alves

et al. 2006

Journal of Luminescence

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The complexes tris(4,4,4-Trifluoro-1-(1-naphthyl)-1,3-butanedionate) (2,2 0 -bipiridyl) Ln(III), Ln(tan) 3 bipy, where Ln(III) ¼ Eu 3+ and Gd 3+ have been synthesized, characterized and their photophysical properties (absorption, excitation and luminescence spectra and emission quantum yield) investigated down to 4.2 K. The Eu(tan) 3 bipy complex has its molecular structure experimentally determined using X-ray crystallography and theoretically using the SMLC/AM1 method as well as their electronic singlet and triplet states were calculated, using the INDO/S-CI method with a point charge model to represent the Eu 3+ ion, where two values were adopted, +3.0e and +3.5e, to investigate the imperfect shielding of the 4f shells. The so calculated +3.5e model electronic absorption spectrum and low lying triplet state energies agreed very well with the experimental ones. The emission quantum yield of the Eu 3+ complex is quite low at room temperature, namely 7%, probably due to the too low lying triplet state, 19,050 cm -1 , and increases by a factor of three when the temperature is lowered to 4.2 K. This strong thermal effect indicates the presence of a channel deactivating the main emitting state, what can be due to a LMCT state possibly lying in the same spectral region, as usually found in Eu 3+ compounds.r 2005 Elsevier B.V. All rights reserved.

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Spectroscopic properties of a new light-converting device Eu(thenoyltrifluoroacetonate)3 2(dibenzyl sulfoxide). A theoretical analysis based on structural data obtained from a sparkle model

Cited by 406 publications

References 30 publications

Recent advances in lanthanide spectroscopy in Brazil

Recent advances in lanthanide spectroscopy in Brazil

Synthesis and optical properties of europium pentafluoropropionate 1,10-phenanthroline complex and its silica glass

Theoretical and experimental photophysical studies of the tris(4,4,4-trifluoro-1-(1-naphthyl)-1,3-butanedionate) (2,2′-bipiridyl)-europium(III)

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