DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 9
·3337-3347
·
IF 4.39
Panpan Du,Siyuan Li,Xuejiao Wang,Qi Zhu,Ji-Guang Li
Solid-state reaction at 1000 °C produces a series of Li-stuffed Li5+2x(La1−yEuy)3(Ta1−xZrx)2O12 garnet phosphors (x = 0–1, y = 0.05–0.6) that exhibit favorable efficiency and thermal stability for red luminescence under either blue or n-UV light excitation, where the optimal composition was identified to be x = 0.5 and y = 0.4. The concentration quenching of luminescence was determined to occur via electric dipole–dipole interactions. Zr4+ substitution for Ta5+, accompanied by additional Li+ for charge compensation, was found via Rietveld structure refinement and Raman/UV-Vis spectroscopy to profoundly affect the tetrahedral and octahedral occupancies of Li, the symmetry of (La/Eu)O8 dodecahedron, and the bandgap of the host lattice and cation disorder, with which the systematically varying excitation and emission behaviors of Eu3+ were deciphered. The Li6(La0.6Eu0.4)3(Ta0.5Zr0.5)2O12 optimal phosphor showed quantum yields of ∼40 and 48% under 393 and 463 nm excitations, respectively, a fluorescence lifetime of ∼0.66 ms for its main emission at 610 nm, color coordinates of around (0.653, 0.347), and can retain as high as ∼85% of its room-temperature emission intensity at 423 K. The phosphor also exhibited a favorable performance for n-UV excited LED lighting.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Haiping Wang,Yujia Pei,Xueren Qian,Xianhui An
Metal-organic frameworks (MOFs) are emerging highly crystallized three-dimensional network complex formed by self-assembling metal ions and organic ligands. However, all MOFs are nanoscale and micro scale powder materials, which greatly impedes their further applications. In this study, a transparent Eu-MOF@TEMPO-oxidized cellulose nanofibrils (Eu-MOF@TOCNF) photoluminescence material for specifically detecting copper ions was fabricated via in-situ synthesis in hydroalcoholic medium. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Fluorescence spectrometer and other equipment were applied to characterize functionalized TOCNF film samples, and the results confirmed the successful fabrication of the functionalized TOCNF film with stable fluorescence properties. The film performed a high selectivity toward copper ion in the presence of other interfering metal ions. The fluorescence intensity of the film decreased gradually with the increase of copper ion concentration, and I 0 / I -1 developed a good linear relationship with [Cu 2+ ], which made the film a promising material for detecting Cu 2+ in water body.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 19
·2518-2525
·
IF 2.6
Xixi Huang,Jinhai Yang,Hao Lu,Xieming Xu,Shuaihua Wang,Shaofan Wu
X-ray detectors based on scintillators are widely used in the fields of medical imaging, high-energy physics, geological exploration, and industrial detection. The development of scintillation materials with different characteristics has become the focus of considerable research interest. Herein, we report a facile hydrothermal synthesis of Gd- and Eu-codoped LiLuF4 microcrystals (MCs), which exhibit strong luminescence of Eu3+ ion characteristic emission, characterized by distinct red fluorescence emission. The research shows that Gd3+ co-doping effectively improved the sensitivity and light yield of LiLuF4:Eu MCs by regulating the proportion of co-doping ions. In addition, the detection limit is 140.72 nGy s−1 for LiLuF4:Eu,Gd MCs, approximately 39 times lower than the dose requirement of medical diagnosis. Based on LiLuF4:Eu,Gd MCs with the superior scintillation properties, a MC-composited film with 250 μm thickness was prepared by a direct coating method. The uniform and high-loading scintillation film exhibits outstanding imaging performance with a high spatial resolution of 14.8 LP mm−1, which confirms the application potential of X-ray imaging.
研究领域:
材料科学
·
医学影像学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ting Du,Jing Wang,Liang Zhang,ShaoChi Wang,Chengyuan Yang,Linxuan Xie,Zhaoli Liu,Yongsheng Ni,XiangHong Xie,Jing Sun,Wentao Zhang,Jianlong Wang
The creation of defects into luminescent MOFs allows for manipulation of fluorescent properties and thus leads to the enhanced detection performance for technological applications. Herein, a modulator-induced defect formation strategy was proposed to introduce missing-linker defect into lanthanide-based metal–organic framework (Eu@UiO-MOFs) and the enhanced detection properties was investigated. Notably, the missing-linker numbers in per Zr 6 cluster were calculated to facilitate comparison and quantitively interpretation. By elaborately tailoring defect numbers, the resultant Eu@UiO-MOFs-2 sensor with 0.53 missing linkers per Zr-O cluster showed a remarkably enhanced response slope and realized excellent trace detection under the range of 0–10 ppm with ultralow detection limit to 5.67 × 10 −7 M (114 ppb), acting as a powerful signal amplifier for trace detection of Cd 2+ . Moreover, the relationship between structural change and defect numbers of Eu@UiO-MOFs-X has been studied to understand the positive effect of the improved enrichment for the optical behavior. As far as we know, this is the first experimental demonstration of missing-linker defects in luminescent MOFs for regulation of optical sensing, offering a unique approach to explore innovative technologies for precisely detecting of heavy metal ion pollutants.
研究领域:
材料科学
·
环境科学
·
光学传感
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Youbing Zhu,Ketao Shi,Tao Zhang,Nianming Jiao,Hui Wang
One-dimensional microporous zeolite, EU-1, exhibits more favorable selectivity of propylene in cracking of petroleum components. However, it faced the problem of low catalytic activity for the poor utilization of active sites. In this work, dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride (TPOAC) was used to functionalize protozeolitic units and inhibit the excessive growth of crystals by the long hydrophobic alkyl chain. The introduction of TPOAC decreased the crystal sizes into nanoscale, enhanced the mesoporous volume of EU-1 zeolite, and exposed more external acid sites. Moreover, TPOAC could interact with Al species, and in this case, fewer Al atoms were incorporated into the zeolite framework, reducing the acid strength and amount. Intelligent gravitation analyzer test indicated that the zeolite prepared with the presence of 0.30 g TPOAC exhibited the largest accessible volumes in n-hexane adsorption, and the highest accessibility of acid sites, which synergistically promoted cracking of n-hexane for the production of light olefins.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Shu-Yan Wei,Jia Chen,Shen-Yin Hou,Bo Sun,Jing Ren,Xin-Hui Wang,Lei Geng,Zhi-Ming Zhang,Hua-Qing Yin
A luminescent lanthanide metal–organic framework, [(TD)5Eu4(HCO2)2(DMF)4] (Eu-TD, TD/H2BTDB = 4,4′-(benzo[c][1,2,5] thiadiazole-4,7-diyl)dibenzoic acid), was synthesized via a solvothermal method by coordinating Eu3+ ions with the strongly emissive ligand H2BTDB. Single-crystal X-ray diffraction analysis reveals that the Eu-TD is in the hexagonal system with space group P6422. Eu-TD demonstrated exceptional selectivity toward Al3+ ions, exhibiting remarkable sensitivity with a low detection limit (limit of detection (LOD) = 0.04 μM) and excellent anti-interference properties. Eu-TD exhibits a pronounced Al3+-triggered luminescent turn-on response across varied aqueous environments, underscoring its viability for environmental monitoring applications. The selective Al3+ recognition in Eu-TD originates from Lewis basic N sites that strongly coordinate with Al3+ through acid–base interactions, concurrently enhancing the absorbance and amplifying the luminescence.
研究领域:
材料科学
·
分析化学
·
环境科学
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Jingyi Xiao,Yi Ren,Menglong Liu,Yiyao Liu,Litao Chen,Jiayan Gao,Jinyang Li,Xue Gao
This study intends to create a ratiometric fluorescence probe utilizing aptamers for the detection of Vibrio parahaemolyticus ( V. parahaemolyticus ) in aquatic products. In this design, aptamer-functionalized magnetic nanoparticles specifically capture V. parahaemolyticus , while boric acid on Eu (III)-Based Metal-Organic Framework (Eu-MOF) interacts with glycolipids present on bacterial cells, thereby achieving dual recognition of V. parahaemolyticus . This fluorescent probe quantitatively detects V. parahaemolyticus by measuring the intensity of ratio fluorescence. The sensor demonstrates a detection range from 77 to 7.7×10 7 CFU/mL, possessing a detection threshold down to 1 CFU/mL. Moreover, the developed method based on Eu-MOF had been successfully applied to real samples. To achieve rapid on-site detection of V. parahaemolyticus , the study designed a portable smartphone sensor that confirms its capability for rapidly detecting pathogens and contributes significantly to establishing a system for regulating safety in detecting food and environment.
研究领域:
生物传感
·
食品安全检测
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Zhiqi Liang,Zhili Zhang,Liu Li,Wen Xu,Mingjun Tao,Decai Li
The magnetic-luminescent bifunctional nanospheres NH 2 –Fe 3 O 4 /HMDA[Eu(DBM) 4 ] were prepared by coating the amino-functionalized Fe 3 O 4 nanospheres with HMDA[Eu(DBM) 4 ]. The X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy of the bifunctional nanospheres were characterized. Molecular simulations of the adsorption configurations of the NH 2 –Fe 3 O 4 /HMDA[Eu(DBM) 4 ] were performed. The photoluminescence and magnetic properties of the nanospheres were investigated. Magnetic particle inspection utilizing NH 2 –Fe 3 O 4 /HMDA[Eu(DBM) 4 ] nanospheres was carried out to detect cracks on the coupling surface. The magnetic field at the defects of the component under the magnetic field was simulated and analyzed. Furthermore, simulations and analyses were performed to examine the magnetic field distribution at the cracks under an applied magnetic field. The magnetic-luminescent bifunctional nanospheres NH 2 –Fe 3 O 4 /HMDA[Eu(DBM) 4 ] show great promise for widespread application in magnetic particle inspection due to their high visibility under ultraviolet light and controllability in the presence of magnetic fields.
研究领域:
材料科学
·
化学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·Vol. 333
·期 4
·2195-2206
·
IF 1.5
Li Junze,Zhao Chuang,Guo Wenbin,Gao Yang,Liu Tingting,Zhou Yu,Hou Hongguo,Jiao Caishan,Zhang Meng
Using DMDODGA as the carrier, the transportation and separation behavior of Eu(III) and La(III) were studied using a plate-type supported liquid membrane. La(III) and Eu(III) reach their maximum transport rates at feed phase nitric acid concentrations of 2 and 4 mol/L, which are 72.41 (± 2.12)% and 77.80 (± 2.45)%; Increasing the concentration of NO 3 − in feed phase will promote the transport of both ions. The change of HNO 3 concentration in feed phase had major effect on the separation of Eu(III)/La(III), and the co-transport of Eu(III)/La(III) was observed when the concentration of NO 3 − was 3 mol/L.
研究领域:
化学工程
·
分离科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
L. Yue,X.Z. Zheng,P.J. Xia,C. Wang,Y.F. Lei,M. Xu,W.B. Dai
Rare-earth (RE) and/or transition metal (TM) ions (co)doped phosphors have garnered much attention for promoting development in the fields of solid state lighting (SSL) and displays. It is a meaningful work to design high-quality phosphor via intelligent assembling from wide variety of compounds with RE/TM ions. Herein, the lanthanum borophosphate La 7 O 6 (BO 3 )(PO 4 ) 2 (LOBP) and Bi/Eu were selected as host and dopants for constructing the phosphor LOBP: Bi/Eu via solid phase synthetic method due to simple synthesis, chemical/thermal stability, rich cationic sites, appropriate bandgap, and controllable optical tuning from synergistic effect of cyan (Bi) and red (Eu) emissions, respectively. The structure and site occupations were analysed via XRD and Rietveld refinements , showing Bi 3+ ions were only resided in La 3+ sites within the monoclinic matrix (P2 1 /n) and appeared greater inclination towards the La sites with coordinate number ( CN ) = 8 as compared with CN = 7 due to the closer ion radius ratio. While Eu 3+ ions entered into the two distinct La sites with almost the same probability. The morphology and elemental mapping were obtained via SEM/EDS, exhibiting irregular particle shape with micron-level size, and the chemical composition met expectation. Through energy transfer (ET) from Bi to Eu under n -UV excitation, the adjustable photoluminescence (PL) from cyan traversing white and finally to red could be achieved. The concentration quenching for both singly- (Bi) and co-doped (Bi/Eu) phosphors were charged by the d-d interactions. Finally, the stable as-fabricated n -UV pumped w LED via coupling the composition-optimized white-emitting LOBP: 2%Bi, 7%Eu to a commercial 305 nm n -UV LED chip shows splendid performances.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2017
·Vol. 10
·期 3
·359-364
·
IF 1.9
Yongli Yu,Jianli Niu,Wei Li,Haixia Liu,Meng Wang
An approach for Brilliant Blue (BB) detection was established based on fluorescence resonance energy transfer, where YVO4:Eu nanocrystals (NCs) are used as the energy donors and BB as the energy acceptor. BB could be electrostatically combined with the YVO4:Eu NCs and the fluorescence of the nanocrystals was quenched. Under optimal conditions, the logarithm of fluorescence intensity of the YVO4:Eu NCs was linearly proportional to the BB concentration in the ranges of 2.5 × 10−6–2.5 × 10−4 and 2.5 × 10−4–2.5 × 10−3 g L−1. The limit of detection was 1.0 × 10−6 g L−1. The method was successfully applied for BB detection in juices and candies. This method has a number of advantages, such as the facile synthesis of YVO4:Eu NCs, a simple and quick quantitative procedure and competitive analytical performance.
研究领域:
分析化学
·
食品科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2020
·Vol. 35
·期 13
·1680-1691
·
IF 2.502
He Lili,Han Xiao,Ge Chunhua,Zhang Rui,Hou Yufang,Zhang Xiangdong
Hydrothermal carbon microsphere (HTC) is a carbon-based fluorescent material, which can be synthesized by hydrothermal carbonization of glucose. In this article, a series of 4ZnO·B 2 O 3 ·H 2 O:Ln 3+ /HTC (where Ln = Eu or Tb) composites were prepared under hydrothermal conditions. The effects of the glucose concentration on the morphology, photoluminescence (PL) intensity and emission color of Zn 3.64 :Eu 0.24 [B 2 O 7 ]·H 2 O/HTCx and Zn 3.55 :Tb 0.3 [B 2 O 7 ]·H 2 O/HTC y were investigated. The relationship between morphology and PL intensity of composites was discussed. The results revealed that the presence of HTC did not change the original emission color of 4ZnO·B 2 O 3 ·H 2 O:Ln 3+ (where Ln = Eu or Tb) materials, but greatly increased their PL intensity, the sphere-like morphology composites have the strongest PL intensity. The Zn 3.64 :Eu 0.24 [B 2 O 7 ]·H 2 O/HTCx and Zn 3.55 :Tb 0.3 [B 2 O 7 ]·H 2 O/HTC y emit bright red light and green light, respectively, under respective excitation wavelengths. The present research suggests that the 4ZnO·B 2 O 3 ·H 2 O:Ln 3+ /HTC (where Ln = Eu or Tb) composites may be candidates of red and green phosphors for display and lighting applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）