Luminescent material based on the [Eu(TTA)3(H2O)2] complex incorporated into modified silica particles for biological applications

Lourenço, Ana Valéria Santos de; Kodaira, Cláudia Akemi; Ramos-Sanchez, Eduardo Milton; Felinto, M.C.F.C.; Goto, Hiro; Gidlund, Magnus; Malta, O.L.; Brito, Hermi F.

doi:10.1016/j.jinorgbio.2013.02.006

Cited by 41 publications

(17 citation statements)

References 40 publications

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“…The characteristic narrow bands arising from the intraconfigurational 5 D 0 -5 F J transitions (J ¼0-4) of Eu 3 þ ion are observed, with dominant hypersensitive 5 D 0 -7 F 2 transition around 614 nm in the whole spectral range, which indicates that the Eu 3 þ ion is located in an symmetry site without inversion center. It was also observed the broadened emission peaks of the 5 D 0 -7 F J transitions in the emission spectra of the doped polymer materials that can be explained by a non-homogeneity of Eu 3 þ sites due to the polymer structures [11,12]. One of the effects of a distribution of different symmetry sites occupied by the RE 3 þ ion is to produce the inhomogeneous line broadening.…”

Section: Resultsmentioning

confidence: 85%

Highly luminescent polycaprolactone films doped with diaquatris(thenoyltrifluoroacetonate)europium(III) complex

Forster

Parra

Lugão

et al. 2015

Journal of Luminescence

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Section: Resultsmentioning

confidence: 85%

Highly luminescent polycaprolactone films doped with diaquatris(thenoyltrifluoroacetonate)europium(III) complex

Forster

Parra

Lugão

et al. 2015

Journal of Luminescence

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“…The emission quantum efficiency of the 5 D 0 emitting level of the Eu 3+ ion was determined based on the PL spectrum measured at room temperature for the Eu 3+ -doped GPTMS/TEOS-derived films (2.0Eu). The experimental intensity parameters Ω λ (λ = 2 and 4), also known as Judd-Ofelt parameters [32,33], were determined from the ratio between the intensities of the 5 D 0 -7 F J (J = 2 and 4) and 5 D 0 → 7 F 1 transitions of Eu 3+ ion [34][35][36], taking the 5 D 0 → 7 F 1 transition as reference because its intensity is considered insensitive to the ligand environment (predominant magnetic dipole character). The calculations of Ω λ values were obtained using: are the squared reduced matrix elements.…”

Section: Intensity Parameters and Emission Quantum Efficiencymentioning

confidence: 99%

Photoluminescence tuning and energy transfer process from Tb3+ to Eu3+ in GPTMS/TEOS–derived organic/silica hybrid films

Vicente

Freddi

Otuka

et al. 2018

Journal of Luminescence

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In this work the photoluminescence study and energy transfer from Tb 3+ to Eu 3+-β-diketonate complexes incorporated into organic/Silica hybrid films derived from 3-glycidoxypropyltrimethoxysilane (GPTMS) and tetraethylorthosilicate (TEOS) alkoxysilanes were investigated. Highly homogeneous and transparent films of Ln 3+-doped GPTMS/TEOS-derived organic/silica hybrids were obtained from the organic/silica sols prepared by sol-gel. Tb 3+ :Eu 3+-doped GPTMS/TEOS-derived films showed very intense luminescence when excited with UV light. Films co-doped with Tb 3+ concentration fixed at 40.0×10 18 ions/cm 3 and Eu 3+ concentrations of 0, 0.03, 0.05, 0.1, 0.3, 0.5, 1.0, 1.5, and 2.0×10 18 ions/cm 3 were studied. The films presented characteristic transitions 5 D 4-7 F 6-3 of Tb 3+ ions and 5 D 0-7 F 0-4 of Eu 3+ ions measured on the visible spectrum region. Energy transfer from Terbium to Europium was studied through emission decay time measurements of 5 D 4-7 F 5 transition of Tb 3+ (547 nm) which showed an accentuated decrease (from 1329 to 55 µs) due to the co-doping with Eu 3+ ions concentrations varied from 0.03 to 1.5×10 18 ions/cm 3. Energy transfer rate (W ET) of 17.4×10 3 s −1 and relative energy transfer efficiency (η T) of 96% were observed for films samples co-doped with 40×10 18 ions/cm 3 of Tb 3+ and 1.5×10 18 ions/cm 3 of Eu 3+. Due to the variation in W ET and η T from Tb 3+ to Eu 3+ , the intensity ratios of Tb 3+ band at 547 nm (5 D 4-7 F 5) and Eu 3+ band at 617 nm (5 D 0-7 F 2) vary remarkably making the co-doped film samples exhibit different luminescence colors varying from green to orange and red which can be tuned by the Tb 3+ /Eu 3+ ratio incorporated into the samples.

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“…Other investigations on the luminescence properties of lanthanide-based systems with NPs, nanorods or systems assembled using sol-gel techniques have been reported in the literature [17,22,27,33,34,38,40,43,45,49,50,60,61,67,73,78,82,88,93,107,[127][128][129]133,136,140,142,143,149,163,[169][170][171]176,178,201,211,212,214,[235][236][237][238][239][240][241][242][243][244][245]…”

Section: Nanoparticles Nanorods and Sol-gel Processmentioning

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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Luminescent material based on the [Eu(TTA)3(H2O)2] complex incorporated into modified silica particles for biological applications

Cited by 41 publications

References 40 publications

Highly luminescent polycaprolactone films doped with diaquatris(thenoyltrifluoroacetonate)europium(III) complex

Highly luminescent polycaprolactone films doped with diaquatris(thenoyltrifluoroacetonate)europium(III) complex

Photoluminescence tuning and energy transfer process from Tb3+ to Eu3+ in GPTMS/TEOS–derived organic/silica hybrid films

Recent advances in lanthanide spectroscopy in Brazil

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