Judd–Ofelt analysis of lanthanide doped silica–PEG hybrid sol–gels

Driesen, Kris; Fourier, Sofie; Görller‐Walrand, Christiane; Binnemans, Koen

doi:10.1039/b208386h

Cited by 24 publications

(30 citation statements)

References 16 publications

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“…Clustering is in fact a somewhat difficult process to be clearly identified, and the utilization of the V l parameters in that case reinforces their utility. [188,193] Values of the V 2 parameter one order of magnitude higher than those cited above (V 2 ¼ 76.23 Â 10 À20 cm 2 , V 4 ¼ 4.788 Â 10 À20 cm 2 , and V 6 ¼ 3.064 Â 10 À20 cm 2 ) were observed considering Nd 3þ -containing b-diketonate complexes. [90] This observation was related to the strong covalence established when these chelating ligands are used.…”

Section: Absorption and Light Emission 41 Nir Emittersmentioning

confidence: 90%

“…The selectivity of occupation and enhancement of Nd 3þ emissions were cleverly tuned using a tetramethylamonium-ion-containing nanocrystallite zeolite and the bis(perfluoromethanesul-fonyl)aminate ligand. [111,112] Lanthanide complexes (Nd, Sm, Dy, Ho, and Er) including 1,10-phenantroline (phen) and ligands derived from pyridine-2,6-dicarboxylic acid (dpa, sometimes designated as dipicolinic acid, H 2 dipic) ligands were also studied, [193] and the range of values obtained suggested stronger interaction with the carboxylic ligand than with the N-donor ligands. An interesting experimental observation concerns results deduced in the presence of an excess of phen ligand.…”

Section: Absorption and Light Emission 41 Nir Emittersmentioning

confidence: 99%

“…The presence of coordinating ether-type oxygen atoms suggests that the lanthanide interaction with the host, if any, should involve those atoms. [193] Despite the lack of samples optical quality, V l intensity parameters have been extracted from reflectance spectra for Nd 3þ -containing zeolites. The sensitivity of V 2 values to experimental conditions enables us to distinguish Nd 3þ ions in inner cages and supercages.…”

Section: Absorption and Light Emission 41 Nir Emittersmentioning

confidence: 99%

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Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

et al. 2009

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Interest in lanthanide-containing organic-inorganic hybrids has grown considerably during the last decade, with the concomitant fabrication of materials with tunable attributes offering modulated properties. The potential of these materials relies on exploiting the synergy between the intrinsic characteristics of sol-gel derived hosts (highly controlled purity, versatile shaping and patterning, excellent optical quality, easy control of the refractive index, photosensitivity, encapsulation of large amounts of isolated emitting centers protected by the host) and the luminescence features of trivalent lanthanide ions (high luminescence quantum yield, narrow bandwidth, long-lived emission, large Stokes shifts, ligand-dependent luminescence sensitization). Promising applications may be envisaged, such as light-emitting devices, active waveguides in the visible and near-IR spectral regions, active coatings, and bio-medical actuators and sensors, opening up exciting directions in materials science and related technologies with significant implications in the integration, miniaturization, and multifunctionalization of devices. This review provides an overview of the latest advances in Ln(3+)-containing siloxane-based hybrids, with emphasis on the different possible synthetic strategies, photoluminescence features, empirical determination.

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Section: Absorption and Light Emission 41 Nir Emittersmentioning

confidence: 90%

Section: Absorption and Light Emission 41 Nir Emittersmentioning

confidence: 99%

Section: Absorption and Light Emission 41 Nir Emittersmentioning

confidence: 99%

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Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

et al. 2009

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“…And few intensity parameters are available for rare earth complexes in hybrid organic-inorganic composite materials. [63][64][65][66] Judd-Ofelt phenomenological intensity parameters Ω λ determined by a least-squares fitting approach for HYD-Dy crystal are as follows: Ω 2 = 25.20 (10 -20 cm -1 ), Ω 4 = 3.93 (10 -20 cm 2 ) and Ω 6 = 4.20 (10 -20 cm -1 ). We cannot compare the Ω λ values obtained by us for HYD-Dy with data of other metal-organic compounds since, to our best knowledge, such data were not reported for Dy(III)-based MOFs.…”

Section: Synthesis Of the Samplesmentioning

confidence: 99%

Synthesis, structure and optical properties of two novel luminescent polar dysprosium metal–organic frameworks: [(CH₃)₂NH₂][Dy(HCOO)₄] and [N₂H₅][Dy(HCOO)₄]

et al. 2016

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We report synthesis, crystal structures, Raman, infrared, electron absorption and emission spectra of two novel luminescent MOFs, [(CH 3 ) 2 NH 2 ][Dy(HCOO) 4 ] and [N 2 H 5 ][Dy(HCOO) 4 ]. These data show that [(CH 3 ) 2 NH 2 ][Dy(HCOO) 4 ] and [N 2 H 5 ][Dy(HCOO) 4 ] crystallize in polar space groups of Pna2 1 and Pca2 1 symmetry, respectively. The polar properties of [N 2 H 5 ][Dy(HCOO) 4 ] come from the arrangement of template cations that possess internal dipole moment as well as from the symmetry of the framework. In [(CH 3 ) 2 NH 2 ][Dy(HCOO) 4 ] the Dy(III)-formate framework is centrosymmetric and polar properties of this compound arise from the arrangement of the DMA + cations. Vibrational studies reveal that position of ν(NN) band, which is very sensitive to coordination changes, is characteristic for hydrazine molecules forming onium ions. Optical studies show that both compounds exhibit emission of Dy(III) ions, in spite of full concentration of dysprosium ions in the studied compounds. Our data also show that radiative decay times, 57 µs for [(CH 3 ) 2 NH 2 ][Dy(HCOO) 4 ] and 96 µs for 2 [N 2 H 5 ][Dy(HCOO) 4 ], are very long compared to lifetimes observed in inorganic compounds. We have also preformed Judd-Ofelt analysis of the optical absorption spectrum of the hydrazinium analogue that provides information on various optical parameters such as electric-dipole oscillator strengths, Judd-Ofelt parameters Ω λ , branching ratios and spontaneous emission probabilities.

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“…In this case, the uniform distribution of rare-earth ions in the bulk of the material is provided by chemical binding of the organic and inorganic components of the system already at the stage of gel formation [7,8]. It is known that the utilization of conventional chelating agents (such as 1,3-dicarbonyl compounds, 1,10-phenanthroline, 2,2-dipyridyl, and others) for complexing of rare-earth ions makes performing sol-gel synthesis in an acid medium impossible because of the poor solubility of these complexes at low pH values [9]. As regards the sol-gel process in a neutral medium, it does not ensure the formation of monolithic SiO 2 xerogel samples, which are necessary for the subsequent sintering into glass [10].…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel synthesis of an optical silica glass doped with rare-earth elements

et al. 2007

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An optical quality silica glass doped with Er 3+ , Yb 3+ and Lu 3+ ions is synthesized by the sol-gel method. Virtually unavoidable clusterization of rare-earth elements that occurs upon introduction of lanthanide salts into a sol-gel system and leads to concentration quenching of luminescence of the glass is eliminated through the use of rare-earth phosphate complexes that are chemically bound to the SiO 2 network. This makes it possible to obtain a nearly molecular distribution of rare-earth elements in the glass matrix.

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Judd–Ofelt analysis of lanthanide doped silica–PEG hybrid sol–gels

Cited by 24 publications

References 16 publications

Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

Synthesis, structure and optical properties of two novel luminescent polar dysprosium metal–organic frameworks: [(CH₃)₂NH₂][Dy(HCOO)₄] and [N₂H₅][Dy(HCOO)₄]

Sol-Gel synthesis of an optical silica glass doped with rare-earth elements

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Judd–Ofelt analysis of lanthanide doped silica–PEG hybrid sol–gels

Cited by 24 publications

References 16 publications

Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

Synthesis, structure and optical properties of two novel luminescent polar dysprosium metal–organic frameworks: [(CH3)2NH2][Dy(HCOO)4] and [N2H5][Dy(HCOO)4]

Sol-Gel synthesis of an optical silica glass doped with rare-earth elements

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Synthesis, structure and optical properties of two novel luminescent polar dysprosium metal–organic frameworks: [(CH₃)₂NH₂][Dy(HCOO)₄] and [N₂H₅][Dy(HCOO)₄]