Nanofibers doped with a novel red-emitting Europium complex: Synthesis, characterization, photophysical property and sensing activity toward molecular oxygen

Sun, Jie; Ge, Heng; Qing, She; Zhaohong, Zuo; Guo, Long

doi:10.1016/j.saa.2012.01.074

Cited by 15 publications

(4 citation statements)

References 29 publications

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“…This indicates that the Eu 3+ ions are localized in at least two different Eu 3+ sites. As expected for the f-f transitions the lifetime values for these materials were in the microseconds scale, which values are showed in Table 1 [2]. According to the data presented at Figs.…”

Section: Resultssupporting

confidence: 79%

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Luminescent and gas sensor properties of the ZrO2:Hhpa:Eu3+ Hybrid Compound

Rosa

Tavares

Moura

et al. 2018

Journal of Luminescence

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Luminescent complexes of rare earth have been extensively studied in different fields of research improving the industrial development of these materials for their utilization as electroluminescent displays, catalysts and biomaterials. The interest in rare earth compounds having aromatic ambidental ligands has increased since it was found that they can act as light collectors (antenna effect), thus bypassing the weak absorption of the lanthanides and resulting in highly efficient luminophors. In this work ZrO 2 was prepared by the hydrothermal microwave method (HMM) at 140°C for 32 min. The hybrid materials was obtained using the previous ZrO 2 dispersed in distilled H 2 O, to which was added Eu 3+ and the 3-hydroxypicolinamide (Hhpa), and then stirred for about 3 h. The materials were analyzed by X-ray diffraction (XRD) and Transmission electron microscopy (TEM). The photoluminescent properties were investigated through their excitation and emission spectra, and gas sensor studies were also performed. It was observed the presence of completely crystalline powders for all materials, and XRD peaks were indexed to the tetragonal phase of ZrO 2 (JCPDS 50-1089). TEM micrographs reveal a spherical nanostructure pattern presenting an average diameter of 4 nm. Excitation and emission spectra revealed the characteristic peaks of the Eu 3+ transitions. The studies of these powders as gas sensors showed a significative change in the electric resistance for the hybrid material.

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Section: Resultssupporting

confidence: 79%

“…This phenomenon resulted in various researches and different ligands were used to this purpose. These organic-inorganic hybrid materials have attracted great interest because of their potential applications in different aspects of technology like optical materials or laser systems [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Luminescent and gas sensor properties of the ZrO2:Hhpa:Eu3+ Hybrid Compound

Rosa

Tavares

Moura

et al. 2018

Journal of Luminescence

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“…The above observation points to negligible energy transfer from the triplet levels of the fluorescent emitter (diimine ligand) to the europium 5 D 0 emissive level in solution that was also confirmed by the quantum chemical calculations at the TD DFT B3LYP/6- 31+G(d,p) PCM level of theory. The triplet energy of the tta ligand according to the literature is calculated to be 2.3 eV (530 nm), whereas the triplet levels of NN1 and NN2 were calculated to be 1.8 eV (685 nm) and 2.6 eV (484 nm), correspondingly. A schematic presentation of energy levels is shown in Figure S9 and clearly demonstrates that the energy gap between 5 D 0 of Eu(III) and diimine ligand NN2 is too large (3451 cm –1 ) for an efficient energy transfer in Eu2 , whereas for NN1 the energy of the diimine triplet level lies even lower than the 5 D 0 level of the europium metallocenter in Eu1 (Figure S9), thus only the tta ligand is responsible for the ignition of the europium-centered luminescence.…”

Section: Resultsmentioning

confidence: 99%

Eu-Based Phosphorescence Lifetime Polymer Nanothermometer: A Nanoemulsion Polymerization Approach to Eliminate Quenching of Eu Emission in Aqueous Media

Shakirova

Шевченко

Baigildin

et al. 2019

ACS Appl. Polym. Mater.

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In this work, we report on the synthesis of the two highly thermosensitive Eu complexes ([(tta)3Eu(NN1)] (Eu1) and [(tta)3Eu(NN2)] (Eu2), where tta is thenoyltrifluoroacetone, NN1 is 3-phenyl-2-(pyridin-2-yl)pyrido[2,1-a]pyrrolo[3,2-c]isoquinoline, and NN2 is 1-phenyl-2-(pyridin-2-yl)-1H-phenanthro[9,10-d]imidazole), and preparation of luminescent thermosensitive nanomaterial (latex nanothermometer, LNT). LNT design and preparation were based on the application of Eu2 and copolymerization of butyl and methyl methacrylates in the presence of the complex, surfactant (cetyltrimethylammonium bromide), and cosurfactant (acetone). Optimization of nanoemulsion polymerization conditions allowed us to obtain strongly luminescent nanoparticles with a narrow size distribution (D = 75 nm; PDI = 0.05). Moreover, the resulting LNT particles feature nonuniform distribution of Eu2, which localizes mainly inside the nanoparticles while the outer layer lacks the complex. As a result, the developed LNT demonstrates monoexponential luminescence decays with a lifetime temperature sensitivity up to 0.84%/K and resolutions of 0.26 K comparable to or exceeding existing analogues together with complete reversibility in cycling experiments.

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“…PVP was chosen as a polymer matrix due to its high transmission spectral window in the ultraviolet–visible–near infrared region and suitability for electrospinning NFs . Eu 3+ was selected as a dopant for PVP NFs owing to its interesting optical properties, including narrow emission bands in the visible region, high quantum yields, high chemical stability, and long lifetime . The choice of polymer matrix is very important, due to the influence on the symmetry of environment, which entails a change of relative luminescent intensity mainly in the hypersensitive transition 5 D 0 → 7 F 2 of the Eu 3+ ions …”

Section: Methodsmentioning

confidence: 99%

Polyvinylpyrrolidone electrospun nanofibers doped with Eu³⁺: Fabrication, characterization, and application in gas sensors

Terra

Sanfelice

Scagion

et al. 2019

J of Applied Polymer Sci

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Polymer nanofibers (NFs)-based optical sensors hold great potential to fabricate low-cost devices capable to monitor different volatile organic compounds (VOCs) related to healthcare and environmental conditions. For instance, ammonia detection is a subject of paramount importance, owing to the serious health problems associated to the exposition to this volatile. In this context, here, we report on the development of optical electrospun NFs composed of polyvinylpyrrolidone (PVP) doped with Europium (Eu 3+ ) aiming at the detection of ammonia. The fabricated NFs were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, fluorescence microscopy, photoluminescence, and excited state lifetime spectroscopies. The luminescence properties changes were evaluated by exposing the PVP_Eu 3+ NFs to ammonia and other distinct interfering VOCs including toluene, tetrahydrofuran, acetone, triethylamine, acetic acid, and chloroform. The sensor exhibited a linear response to ammonia exposition in the concentration range from 0 to 50 ppm, yielding a detection limit of 4.7 ppm. Our results indicate the potential application of PVP_Eu 3+ electrospun NFs in optical sensors for ammonia detection at room temperature based on luminescence quenching.

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Nanofibers doped with a novel red-emitting Europium complex: Synthesis, characterization, photophysical property and sensing activity toward molecular oxygen

Cited by 15 publications

References 29 publications

Luminescent and gas sensor properties of the ZrO2:Hhpa:Eu3+ Hybrid Compound

Luminescent and gas sensor properties of the ZrO2:Hhpa:Eu3+ Hybrid Compound

Eu-Based Phosphorescence Lifetime Polymer Nanothermometer: A Nanoemulsion Polymerization Approach to Eliminate Quenching of Eu Emission in Aqueous Media

Polyvinylpyrrolidone electrospun nanofibers doped with Eu³⁺: Fabrication, characterization, and application in gas sensors

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Nanofibers doped with a novel red-emitting Europium complex: Synthesis, characterization, photophysical property and sensing activity toward molecular oxygen

Cited by 15 publications

References 29 publications

Luminescent and gas sensor properties of the ZrO2:Hhpa:Eu3+ Hybrid Compound

Luminescent and gas sensor properties of the ZrO2:Hhpa:Eu3+ Hybrid Compound

Eu-Based Phosphorescence Lifetime Polymer Nanothermometer: A Nanoemulsion Polymerization Approach to Eliminate Quenching of Eu Emission in Aqueous Media

Polyvinylpyrrolidone electrospun nanofibers doped with Eu3+: Fabrication, characterization, and application in gas sensors

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Polyvinylpyrrolidone electrospun nanofibers doped with Eu³⁺: Fabrication, characterization, and application in gas sensors