Modulating the photoluminescence of europium oxide nanoparticles by controlling thermal decomposition conditions

Lai, Junxin; Wang, Tingjian; Zhang, Hong; Ye, Ling; Chen, Yan; Gu, Wei

doi:10.1016/j.jlumin.2019.116534

Cited by 11 publications

(3 citation statements)

References 29 publications

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“…In recent decades, there has been scientific and technological development regarding the use of lanthanides due to their versatility in different areas, including chemical analysis [1], catalysis [2] and biologic applications [3,4]. In particular, they are used for their luminescence properties, including highly pure color [5,6] and short radiative lifetimes [7].…”

Section: Introductionmentioning

confidence: 99%

New Mononuclear Complex of Europium(III) and Benzoic Acid: From Synthesis and Crystal Structure Solution to Luminescence Emission

et al. 2020

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This study presents a general method which can be used for the synthesis of mononuclear complexes with europium(III) and organic ligands with carboxylic groups. It describes the procedure for preparing a new mononuclear coordination complex with europium(III) and carboxylate ligands sourced from benzoic acid. The construction of mononuclear complexes with a coordination sphere saturated in carboxylic ligands must go through the preparation and purification of a europium(III) intermediate complex that presents a coordination sphere with anions that will be later exchanged for carboxylic groups and finally precipitated as a solvent-free or anion-free complex within the coordination sphere. The detailed synthesis procedure for powders of a new complex, as well as studies of its structural composition at each phase and luminescent properties, are detailed in this study. Analytical and spectroscopic data reveal the formation of a new mononuclear complex of the general formula [Eu(OOCC6H5)3·(HOOCC6H5)2]. The crystal structure of the Eu(III) complex was solved using X-ray powder diffraction data and EXPO2014 software, and the crystal structure result was deposited in the CCDC service with number 19771999.

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Section: Introductionmentioning

confidence: 99%

New Mononuclear Complex of Europium(III) and Benzoic Acid: From Synthesis and Crystal Structure Solution to Luminescence Emission

et al. 2020

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“…For all samples investigated, the overall emission decay process can be fitted only with a minimum of two exponential functions. This indicates the large influence of the surface, and it is quite normal for NPs due to the high surface-to-volume ratio. , Full data on emission decay fit parameters for all investigations carried out at RT and 77 K are given in SI Section S2.16 (Tables S12 and S20). Measured average lifetimes are somewhat shorter than that for typical Eu 3+ -doped systems (3.8–8.8 ms), − but are in the range of other Eu 3+ containing scheelites (0.3–0.9 ms). , The Eu 3+ overall emission decay process time in ME samples depends on the Eu 3+ content and varies from 0.901 ± 0.009 ms for the 1 at.…”

Section: Resultsmentioning

confidence: 99%

“…This indicates the large influence of the surface, and it is quite normal for NPs due to the high surface-to-volume ratio. 59,60 Full data on emission decay fit parameters for all investigations carried out at RT and 77 K are given in SI Section S2.16 (Tables S12 and S20). Measured average lifetimes are somewhat shorter than that for typical Eu 3+ -doped systems (3.8−8.8 ms), 61−63 but are in the range of other Eu 3+ containing scheelites (0.3−0.9 ms).…”

Section: ■ Introductionmentioning

confidence: 99%

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Mazzariol,

Tajoli,

Sedykh

et al. 2023

ACS Appl. Nano Mater.

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The possibility to precisely control reaction outcomes for pursuing materials with well-defined features is a main endeavor in the development of inorganic materials. Confining reactions within a confined space, such as nanoreactors, is an extremely promising methodology which allows to ensure control over the final properties of the material. An effective room temperature inverse miniemulsion approach for the controlled synthesis of undoped and Eu3+-doped calcium molybdate crystalline nanophosphors was developed. The advantages and the efficiency of confined space in terms of controlling nanoparticle features like size, shape, and functional properties are highlighted by systematically comparing miniemulsion products with calcium molybdate particles obtained without confinement from a typical batch synthesis. A relevant beneficial impact of space confinement by miniemulsion nanodroplets is observed on the control of size and shape of the final nanoparticles, resulting in 12 nm spherical nanoparticles with a narrow size distribution, as compared to the 58 nm irregularly shaped and aggregated particles from the batch approach (assessed by TEM analysis). Further considerable effects of the confined space for the miniemulsion samples are found on the doping effectiveness, leading to a more homogeneous distribution of the Eu3+ ions into the molybdate host matrix, without segregation (assessed by PXRD, XAS, and ICP-MS). These findings are finally related to the photoluminescence properties, which are evidenced to be closely dependent on the Eu3+ content for the miniemulsion samples, as an increase of the relative intensity of the direct f–f excitation and a shortening of the lifetime (from 0.901 ms for 1 at. % to 0.625 ms for 7 at. % samples) with increasing Eu3+ content are observed, whereas no relationship between these parameters and the Eu3+ content is evidenced for the batch samples. All these results are ascribed to the uniform and controlled crystallization occurring inside each miniemulsion nanodroplet, as opposed to the less controlled nucleation and growth for a classic nonconfined approach.

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Nanoparticles in fingerprint science

Prasad,

Lukose

2024

Handbook of Nanomaterials, Volume 2

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Modulating the photoluminescence of europium oxide nanoparticles by controlling thermal decomposition conditions

Cited by 11 publications

References 29 publications

New Mononuclear Complex of Europium(III) and Benzoic Acid: From Synthesis and Crystal Structure Solution to Luminescence Emission

New Mononuclear Complex of Europium(III) and Benzoic Acid: From Synthesis and Crystal Structure Solution to Luminescence Emission

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Nanoparticles in fingerprint science

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Modulating the photoluminescence of europium oxide nanoparticles by controlling thermal decomposition conditions

Cited by 11 publications

References 29 publications

New Mononuclear Complex of Europium(III) and Benzoic Acid: From Synthesis and Crystal Structure Solution to Luminescence Emission

New Mononuclear Complex of Europium(III) and Benzoic Acid: From Synthesis and Crystal Structure Solution to Luminescence Emission

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu3+-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Nanoparticles in fingerprint science

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Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis