NEW JOURNAL OF CHEMISTRY
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2024
·Vol. 48
·期 27
·12146-12152
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IF 2.7
Henan Zhang,Qi Liu,Alena Novoselova,Valeri Smolenski,Kewei Jiang,Yongde Yan,Milin Zhang,Jun Wang
The reactions of oxygen and samarium ions in molten NaCl–2CsCl eutectic in the temperature range of 823–913 K have been investigated by potentiometric titration in an inert gas atmosphere. The activity of oxygen ions in the studied melts was monitored using a standard YZME (indicator) electrode based on Y2O3-stabilized ZrO2 with a solid–electrolyte membrane. The titration of Sm3+ by O2− ions demonstrated the formation of insoluble SmOCl compounds in the investigated region. The mechanism of formation of SmOCl and Sm2O3 was established by the analysis of potentiometric titration curves. Subsequently, the solubility of SmOCl and Sm2O3 in the melt was calculated using the material balance equation and solubility constant equation. Finally, the basic thermodynamic properties of SmOCl and Sm2O3 in molten NaCl–2CsCl eutectic were calculated, and the properties of samarium in the melt were summarized using the Pourbaix-type (E-pO2−) diagram to determine the kinds of stabilized samarium compounds. Furthermore, the optimal chlorination conditions can be obtained from the E-pO2− diagram of Sm.
研究领域:
化学
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材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ying Li,Yong Hong Ma,Aihua Mao,Xiwei Qi
A series of transparent (1- y )La 2 O 3 –Ga 2 O 3 - y Sm 2 O 3 - x Eu 2 O 3 (where x = 0, 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.14, and y = 0, 0.04) were successfully synthesized using a containerless solidification process. Co-doping with Sm 3+ and Eu 3+ enhanced the energy absorption of Eu 3+ , notably improving the characteristic emission peak 5 D 0 - 7 F 2 of Eu 3+ . The peak emission intensity for y = 0.04 was observed at x = 0.08, attributable to the concentration quenching of Eu 3+ ions. As the concentration of Eu 3+ increased, the energy transfer effect on emission intensity diminished. Attributed to the energy transfer between Sm 3+ and Eu 3+ , Sm 3+ may primarily serve as the sensitizer, and Eu 3+ as the activator. According to the Dexter theory, which suggests that the interaction between activator ions and their adjacent ions is the primary mechanism of energy transfer and quenching among Eu 3+ ions and adjacent ions, an increase in Eu 3+ concentration leads to a decrease in the distance between Eu 3+ and adjacent ions, strengthening their interaction, and potentially inducing concentration quenching. Furthermore, with an increase in Eu 3+ concentration, the CIE chromaticity coordinates for the samples co-doped with Sm 3+ and Eu 3+ shifted significantly, enhancing the color purity of the emitted light and bringing it closer to the NTSC color standard coordinates (0.67, 0.33).
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Jieying Li,Jiachun Liu,Quwei Ni,Qijian Zhu,Zhi Zeng,Jiansheng Huo,Chenggang Long,Qianming Wang
The strategy to enhance phosphor stability against thermal quenching and moisture conditions will contribute to controlling the feature of phosphor-converted white-light-emitting diodes (pc-WLEDs). Herein, an effective strategy is achieved with the incorporation of Sm3+ ions, and a robust reddish-orange emission (no thermal quenching up to 498 K) is obtained based on Ba3LaNb3O12 as a host. In light of excitation by near-ultraviolet irradiation at 408 nm, Ba3LaNb3O12:Sm3+ gives rise to a typical signal ascribed to the 4G5/2 → 6HJ/2 (J = 5, 7, 9, and 11) transitions of Sm3+ ions. The concentration quenching effect is observed when the Sm3+ content exceeds 10%, and the quenching mechanism is caused by electronic dipole–dipole interactions. Based on the narrow emission curves, a very high color purity (92.4%) could be recorded. The Sm3+ substitution at the Ba2+/La3+ site leads to a rigid structural lattice and abundant electron-trapping centers for the Sm3+ ions, which will be responsible for the zero-thermal-quenching phenomenon. In addition, oleic acid (OA) is selected to form a hydrophobic covering surface structure to protect Ba3LaNb3O12:Sm3+, which can assist in improving the moisture resistance. The most favorable parameters concerning the warm-light emission (a high general color rendering index, Ra, of 85.7 and a low correlated color temperature, CCT, of 4965 K) can be achieved in pc-WLEDs containing an OA-modified sample. Moreover, its luminous efficiency, LE, can maintain 82.9% of its initial value after 120 h under controlled environmental conditions of 85 °C and 85% humidity. These results pave a new way to optimize the sample as a potential candidate for red-emitting materials.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Hongbo Liu,Xu Wang,Chaoyong Deng,Min Zhang
In this investigation, the photoluminescence properties, energy transfer phenomenon of BaY 2 ZnO 5 :Sm 3+ /Eu 3+ doped/co-doped phosphor are reported and synthesized by high temperature solid state reaction method. The crystal structure, micromorphology, optical diffuse reflectance and photoluminescence properties of the samples were studied. The results show that concentration quenching phenomenon is found. With the increase of Eu 3+ ion concentration, the emission peaks of Sm 3+ gradually decrease, indicating that energy transfer between Sm 3+ and Eu 3+ . The optimal concentrations are 0.05 mol and 0.2 mol for single doping Sm 3+ and Eu 3+ , respectively. The energy transfer efficiency is calculated to be 78.47–95.19 %. The BaY 2 ZnO 5 phosphors have potential application value in the fields of white light LEDs and anti-counterfeiting.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Wenzhi Su,Shoujun Ding,Chuancheng Zhang,Miaomiao Wang,Hao Ren,Haitang Hu,Yong Zou,Wenpeng Liu
A series of trivalent samarium ions (Sm 3+ ) doped double perovskite Sr 2 LuNbO 6 ( x at% Sm 3+ :Sr 2 LuNbO 6 , x = 0.5–15) phosphors have been prepared via high-temperature solid-state method. The structural characterization of these phosphors was conducted employing X-ray diffraction (XRD), XRD Rietveld refinement , scanning electron microscope (SEM) and transmission electron microscope (TEM), respectively. Density functional theory calculations utilizing the Vienna ab initio simulation package (VASP) were employed to unveil the electronic structures, encompassing the band structure and density of states (DOS). Photoluminescence (PL) spectroscopy was employed to scrutinize the luminescent properties, while the thermal stability of the PL spectra was also evaluated. The most prominent emission peak, exhibiting an orange-reddish hue, was observed at 601 nm upon excitation at 406 nm. The quenching mechanism of Sm 3+ ions within the Sr 2 LuNbO 6 host lattice was identified as a dipole-dipole interaction, with the quenching concentration of 3 at%. Moreover, the phosphors demonstrated excellent thermal stability, with an activation energy ( E a ) value of 0.126 eV. These findings collectively underscore the promising potential of Sm 3+ :Sr 2 LuNbO 6 orange-reddish phosphors for applications in white light-emitting diodes (w-LEDs).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Liu Yang,Yu-Long Liu,Xian-Xian Ji,Cheng-Guo Liu,Ying Fu,Fei Ye
Background A novel luminescent sensor with dual-emitting platforms, Tb@UiO-66 , was used for highly detecting Sm 3+ and teflubenzuron. Methods Tb@UiO-66 was synthesized on basis of the exchange of guest molecules, where Tb 3+ ions were encapsulated into the cages of UiO-66 . Significant finds The results of multiband fluorescence originated from the linker-to-cluster charge transfer and the characteristic emission of Tb III . Tb@UiO-66 displayed luminescence enhancements or quenches according to small molecules. Especially for Sm 3+ and teflubenzuron, the characteristic peaks of Tb@UiO-66 at 490, 545, 585, and 621 nm increased with the increasing of the concentration of the analytes, where Tb@UiO-66 exhibited the effect of luminescence enhancement. The detection limits for detecting Sm 3+ and teflubenzuron were 0.09 μM and 0.21 μM, and the changes of luminescence intensities could be observed by naked eyes under the UV light at 365 nm. Tb@UiO-66 could also be used to detect teflubenzuron in real water samples. Tb@UiO-66 could be reused for at least 5 cycles for the detection of Sm 3+ and teflubenzuron with the framework of Tb@UiO-66 uncollapsed. These results implied that the integration of Ln III luminescent materials and Zr-MOFs by doping method provided a new strategy for fabricating novel luminescent sensors for detecting polluting small molecules.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Dielectrics
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2019
·
IF 0
Yong Li,Jun Zhao,Xinglei Zhang,Qiannan Jia,Xihong Hao
Solid solutions of the lead-free 0.88( Na 0 . 5 Bi 0 . 5 ) TiO 3 -0.12( Ba 1 − x Sm x ) TiO 3 (NBT-BT: x Sm) ferroelectric ceramics were synthesized by solid state reaction. The doping of Sm promotes the structure of the ceramics to transform toward morphotropic phase boundary, and it decreases the grain size of the ceramics. With the increase of Sm content, the ferroelectric properties are improved gradually, where the ferroelectric polarization increases and the coercive field decreases. Sm doping induces a dielectric anomaly with obvious frequency dispersion at a low temperature, exhibiting the transition from the ferroelectric to relaxor state. Moreover, the photoluminescence spectra of NBT-BT: x Sm ceramics exhibit a strong orange emission upon blue light excitation of the 400 nm to 500 nm. The emission intensities are strongly dependent on the Sm doping concentration, which reached the optimal value as the doping concentration is 0.7%. These results suggest that the NBT-BT: x Sm ceramics may have significant technological promise in novel multifunctional devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
POLYMERS & POLYMER COMPOSITES
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2019
·
IF 0.683
Qing Zhang,Guixian Su
Polysiloxane with amino group as the functional side chain was prepared via equilibrium polycondensation reaction. It was modified with salicylaldehyde and then incorporated with lanthanide ions (Dy3+ and Sm3+) to obtain two luminescent functionalized polysiloxane–lanthanide composite materials. The structures and properties of products were characterized by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, ultraviolet–visible absorption spectroscopy, fluorescent emission spectroscopy, and thermogravimetric analysis. The results show that two kinds of lanthanide ions were all incorporated successfully with the functionalized polysiloxanes. The coordination effect exists between the nitrogen atoms on the ligand and the lanthanide ions. In addition, the green and red light emissions that are characteristic of Dy3+ and Sm3+ were achieved.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Pingfan Du,Lixin Song,Jie Xiong,Houbao Cao,Zhenqiang Xi,Shaoyi Guo,Naiyan Wang,Jianjun Chen
Samarium ions doped strontium molybdate (SrMoO 4 :Sm 3+ ) nanofibers (NFs) were fabricated by a simple electrospinning process. The obtained SrMoO 4 :Sm 3+ NFs are composed of scheelite-type tetragonal SrMoO 4 phase, and the NFs have an average diameter of ca. 90 nm. Under 275 nm ultraviolet (UV) excitation, the NFs show an orange-red fluorescent property symbolized by a characteristic emission (606 nm) resulting from the 4 G 5/2 → 6 H 7/2 energy level transition of Sm 3+ . And the photoluminescence (PL) emissi on intensity of the SrMoO 4 :Sm 3+ NFs is superior to that of the nanoparticles (NPs) counterpart under the same doping concentrations. The effect of Sm 3+ concentrations on the 4 G 5/2 → 6 H 7/2 emission intensity was also investigated. The result reveals that the concentration quenching will occur when the Sm 3+ content exceeds 2 at.%. In other words, the SrMoO 4 :Sm 3+ NFs have an optimal luminescent performance under such a doping concentration.
研究领域:
材料科学
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纳米科技
·
发光材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Meiqi Chang,Yanhua Song,Jie Chen,Lei Cui,Zhan Shi,Ye Sheng,Haifeng Zou
A novel multifunctional core–shell, yolk–shell SiO2@TiO2:Eu3+/Sm3+ and hollow TiO2:Eu3+/Sm3+ structures were successfully synthesized. The relationship between morphology/ions doping and multifunctional properties including photoluminescence and photocatalysis has been discussed in detail for the first time using systematic characterization techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), photoluminescence (PL), ultraviolet–visible light (UV-vis) analysis, Fourier transform infrared (FT-IR) spectroscopy, Brunauer–Emmett–Teller (BET) surface area analysis, and X-ray photoelectron spectroscopy (XPS). Upon ultraviolet (UV) excitation, the products show the characteristic red and orange–red emission lines of Eu3+ and Sm3+, respectively. In addition, Judd–Ofelt intensity parameters (Ω2, Ω4) were used to investigate the symmetry and coordination state of Eu3+ ions in the products with different morphologies. The relative luminescence intensities were in the following order: yolk–shell > core–shell > hollow structure. This phenomenon can be ascribed to the unique yolk–shell configuration, which possesses appropriate interior cavity used for multiple reflections and scattering, allowing for more-efficient utilization of the light. Moreover, compared with yolk–shell and hollow structure, the core–shell spheres exhibit excellent photoactivity for the degradation of MO, because the existence of Ti–O–Si bonds increases the surface acidity of the sample, thereby activating the oxidation reaction. In addition, the electron activation in the TiO2 matrix can be facilitated through intermediate oxygen atoms. Moreover, products doped with different rare-earth (RE3+) ions exhibited distinguishable photocatalytic performance. The surfactant-free method provides a promising route toward the development of multifunctional materials for many applications in photocatalysis and PL.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Min Zhang,Xu Wang,Chaoyong Deng
A series of rare earth Sm 3 + -doped BaTiO 3 (BTO: x Sm 3 + ) samples were prepared in this work through high-temperature solid-state reaction. Their microstructure, photoluminescence, optical, and electrocatalytic OER properties were studied. As the concentration of Sm 3 + ions increased, there was a concentration dependent increase in luminescence intensity and optical bandgap. Rare earth doping significantly reduced the OER overpotential (from 509 mV to 316 mV), and under near-ultraviolet excitation at 408 nm, an orange-red emission ( λ e m = 595 nm) was observed. The results indicate that the prepared materials are suitable for the design and application of optoelectronic devices.
研究领域:
材料科学
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光学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2023
·Vol. 13
·期 8
·1273
·
IF 2.7
Huiting Zhang,Zhonghua Zhu,Shengdi Ta,Ninghan Zeng,Limin Wu,Wenxia Wu,Peng Zhang,Shoulei Xu,Bernard Albert Goodman,Wen Deng
High-quality single crystals with empirical composition Y2.96Sm0.04Ga5O12(YGG: Sm3+) were successfully prepared by the optical floating zone method for the first time and compared with related single crystals of Y2.96Sm0.04Al5O12(YAG: Sm3+). With both crystals, XRD showed that Sm3+entered the cubic-phase structure. Optical absorption spectra produced a series of peaks from Sm3+in the 250 nm to 550 nm range, and photoluminescence excitation (PLE) spectra detected at 613 nm showed strong excitation peaks at 407 nm and 468 nm. A strong emission peak at 611 nm (orange-red light) was observed in the photoluminescence (PL) spectra under excitations at both 407 and 468 nm, respectively, but it was much brighter under excitation at 407 nm. Furthermore, with both emission spectra, the peaks from the YGG: Sm3+crystal were significantly more intense than those from the YAG: Sm3+crystal, and both experienced a blue shift. In addition, under excitation at 407 nm, the color purity of the emitted orange-red light of YGG: Sm3+was higher than that of the YAG: Sm3+crystal, and the fluorescence lifetime for the4G5/2→6H7/2transition of YGG: Sm3+was longer than that of the YAG: Sm3+crystal. The optical properties of the YGG: Sm3+crystal are better than those of the YAG: Sm3+crystal.
研究领域:
材料科学
·
光学材料
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无机化学
·
固体物理
·
发光材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）