COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Bo Li,Rui Shi,Zhongzhi Wang,Xin Qiao,Leijun Shen,Liqun Shi
Rare earth luminescent complexes encounter defects such as poor thermal stability, poor dispersibility, and easy quenching of fluorescence emission by water in practical applications. To improve these defects, we innovatively propose using polyhedral oligomeric silsesquioxane (POSS) to enhance the performance of rare earth complexes. We designed and prepared POSS-MAA-EuL composite materials. POSS is modified with long chains containing -COOH functional groups, allowing it to bind with rare earth complexes through coordination interactions. Experimental results have shown that the combination of POSS not only improves the dispersibility of rare earth complexes, but also enhances their thermal stability. It is worth noting that the binding of POSS endows rare earth complexes with the ability of resisting fluorescence emission quenching by water. When the same volume of deionized water is added (2000 μL), the fluorescence of rare earth complex is almost completely quenched, with a quenching efficiency of 99.0 %, while the quenching efficiency of POSS-MAA-EuL is only 39.2 %. There are few reports on improving the water quenching resistance of rare earth luminescent complexes by combining with POSS. Therefore, this work provides a new way to improve the performance of rare earth complexes.
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PACKAGING TECHNOLOGY AND SCIENCE
·
2025
·
IF 3.7
Wenna Wang,Peng Zhao,Li Cai,Ting Zhao,Yingying Guo,Kexi Sun,Zuju Shu,Lijun Zhang,Zhongbo Li
Developing simple and reliable sensors for food freshness is a key goal in intelligent packaging. In this study, a ratiometric fluorescent nanofibre film was successfully developed for real-time visual monitoring of shrimp freshness. The film was constructed by embedding an amine-responsive fluorophore, fluorescein isothiocyanate (FITC) and a stable reference fluorophore, Eu (DBM) 3 Bpy, into an electrospun polyvinyl alcohol (PVA) matrix. The sensing principle relies on the pH-driven enhancement of FITC's green emission (530 nm) in the presence of biogenic amines, whereas the Eu-complex provides a constant red reference signal (610 nm). This dual-emission system creates a clear fluorescence colour change from orange to yellow-green as shrimp spoils. The sensor exhibited high selectivity and a rapid response, detecting spoilage within 6 h at 25°C. The maximum colour difference (ΔE) reached 64.78, allowing for unambiguous visual detection. This robust and easy-to-fabricate nanofibre film holds great promise for practical applications in food safety and intelligent packaging technology.
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Biosensors-Basel
·
2025
·Vol. 15
·期 5
·313
·
IF 5.6
Yinjun Li,Hua Ding,Ziyu Wang,Zewei Luo,Xitian Peng
Lateral flow immunoassay (LFIA) is a promising tool for rapid detection in the field of agricultural product analysis due to its advantages of cost-effectiveness and operational simplicity. In this work, Eu metal–organic frameworks (MOFs) were introduced to LFIA as a rapid detection method characterized by high stability and low interference. Key research objectives included strong fluorescence, ease of labeling, and the utilization of fluorescent probes. Eu-MOFs were synthesized in one step via the hydrothermal method, exhibiting a fluorescence lifetime of 163 μs and spherical particles with diameters ranging from 250 to 400 nm. These conditions fulfill the characteristics and requirements of LFIA. Eu-MOFs exploit the porous nature of MOFs to mitigate the drawbacks associated with complex crosslinking agents. This enables antibody proteins to be cross-linked merely upon contact, thereby simplifying the detection process. A time-resolved LFIA method was developed utilizing Eu-MOFs for the detection of aflatoxin B1 (AFB1) in corn, achieving a limit of detection (LOD, IC10) of 0.149 ng/mL. The accuracy and reliability of the Eu-MOFs-LFIA method were validated through comparisons with spiked concentrations during spiking and blind sample analyses, with verification conducted using ultra-high-performance liquid chromatography mass spectrometry (UPLC-MS). Furthermore, testing of real samples demonstrated that the Eu-MOFs-LFIA method can effectively facilitate rapid detection of AFB1 in corn.
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JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Ruifei Qin,Lina Liu,Chunjuan Tang,Guanglei Guo,Kexin Wang,Jia Liu,Feng Shan
In this paper, Cs 2 NaRECl 6 (RE = Yb 0.9 Er 0.1 , Tb, Eu) microncrystals (MCs) were synthesized via a facile solvent-thermal method with the ethanol-water mixture (95.6∶4.4, m/m) as solvent. The prepared MCs were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray spectroscopy (EDS). Photoluminescence (PL) properties of prepared MCs were measured and possible luminescent processes were given.
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PHYSICA SCRIPTA
·
2021
·Vol. 96
·期 12
·125861
·
IF 2.487
Bijun Fang,Yu Zhou,Shanshan Zhang,Shuai Zhang,Jianning Ding
Multifunctional performance [(Ba0.85Ca0.15)0.995Eu0.005](Ti0.9Hf0.1)O3 (BCTH-Eu) ceramics were prepared by conventional solid-state low-temperature sintering method via LiBO2 doping, in which the sintering aid LiBO2 was introduced into the calcined perovskite precursor powder through liquid phase coating technique. Phase-pure perovskite structure BCTH-Eu ceramics are obtained by the method, and the sintering temperature is decreased about 150 °C as compared with the conventional method whose sintering temperature is normally above 1450 °C. The ceramics present rather high density, uniform distribution of grains and elementals, and have submicron meter grain size. Due to complex substitution of cations at A-site and B-site of the perovskite structure, the LiBO2-doped BCTH-Eu ceramics exhibit displacive driven normal ferroelectrics accompanied by apparent diffused relaxation characteristic. The 1340 °C sintered LiBO2-doped BCTH-Eu ceramics present maximum piezoelectric constant d33 value of 314 pC/N poled under 20 kV cm−1, and the ceramics sintered between 1320 °C–1330 °C exhibit excellent comprehensive electrical properties and multifunctional performance. Such excellent multifunctional properties obtained in this work can be partially attributed to the coexistence of multi-ferroelectric phases, which is confirmed by dielectric response fitting and Raman Gaussian fitting.
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ACTA PHYSICO-CHIMICA SINICA
·
2017
·Vol. 33
·期 7
·1446-1452
·
IF 0.767
CHEN Fan,WANG Zhong-Yue,ZHANG Yan-Yan,YU Ke-Han,WENG Li-Xing,WEI Wei
Monodisperse La1-x
Eu
x
F3 nanoparticles (NPs) were functionalized by poly(acrylic acid) (PAA) via a one-pot modified hydrothermal method. The morphology, crystal structure, surface groups, and luminescence properties of the as-produced
La1-x
Eu
x
F3@PAA NPs were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and photoluminescence (PL) spectroscopy. The produced nanoparticles were (7±3) nm
in size, water soluble, and buffer stable, with good photostability and biocompatibility. In vitro imaging revealed the low cytotoxicity of the as-synthesized NPs incubated with HeLa cancer cells. Thus, the colloidal La1-x
Eu
x
F3@PAA NPs
exhibit great potential for use as optical imaging probes in biological applications.
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CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Youbing Zhu,Xiangfei Ding,Jian Chen,Hongyan Wang,Hui Wang
One-dimensional microporous zeolite, EU-1, has tighter restriction for bulky intermediates, exhibiting more favorable selectivity of propylene than ZSM-5 in catalytic cracking. However, the diffusion limitation accelerates coke generation, passivates acid sites and deactivates the zeolite. In this study, a strategy was proposed to etch amorphous species between EU-1 nanocrystals using NH 4 F solution to improve the diffusion property. It was found that the etching process occurred on the crystal surface and mesopores were introduced. Catalytic performance evaluation in n-hexane cracking demonstrated that the maximum propylene selectivity over parent EU-1 was 33.6 wt% ( vs . 5.7 wt% for ZSM-5). The n-hexane conversion was increased by 24 wt% over EU-1 etched in 20 wt% NH 4 F solution. Moreover, the introduction of mesopores provides accommodation space for coke. This study developed hierarchical EU-1 zeolite with favorable diffusion ability and reported a feasible strategy to improve the catalytic performance of EU-1 for propylene production.
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LANGMUIR
·
2025
·
IF 3.9
Rui Cao,Xinxin Li,Zhihang He,Hanxiao Tang,Xiao-Ke Zheng,Zhijuan Zhang
The development of probes for the efficient detection of volatile organic compounds is crucial for both human health protection and environmental monitoring. In this study, we successfully synthesized a ratiometric fluorescent sensing material [Eu-UiO-67 (1:1)], featuring dual-emission fluorescence peaks via a one-pot method. This material demonstrated exceptional ratiometric fluorescence recognition properties for liquid styrene and isoprene, achieving low limit of detections (LODs) of 6.2 and 20.24 ppb, respectively. Furthermore, we leveraged its outstanding photoluminescence properties to fabricate a Eu-UiO-67 film, which exhibited distinctive fluorescence responses toward gaseous styrene and isoprene. This unique behavior resulted in LODs of 12.42 ppb for gaseous styrene and 15.39 ppb for gaseous isoprene. The investigation into the sensing mechanisms revealed that the fluorescence response for styrene was mediated by an internal filtration effect, which arose from the competitive energy absorption between styrene and the Eu-UiO-67 (1:1) material. In contrast, fluorescence resonance energy transfer occurred between isoprene and the Eu-UiO-67 (1:1) materials. This approach offers a sensitive and reliable method for the detection of liquid/gaseous styrene and isoprene.
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BIOSENSORS & BIOELECTRONICS
·
2025
·
IF 10.5
Dongmei Liu,Xinhui Jiang,Xiaoming Li,Hecun Zou,Lin He,Zhengwei Zhang,Siqiao Li,Xintong Bian
Diethylstilbestrol (DES), a synthetic estrogen, is associated with severe endocrine disruption and carcinogenic risks, posing persistent biological and environmental hazards. Herein, a bimetallic Fe/Eu–based metal–organic framework (Fe/Eu–MOF) with distinct multi–emission properties was developed as a ratiometric fluorescent sensor for sensitive and intelligent visual detection of DES. The Fe/Eu–MOF exhibited stable red emission at 615 nm and DES–responsive blue emission at 410 nm, enabling self–referenced quantification. The sensor showed two linear ranges (0.005–2 and 2–30 μg/mL), a low detection limit (1.78 ng/mL), and excellent selectivity against potential interferents. Its practicality was validated in milk and shrimp, demonstrating excellent recovery and reproducibility. Additionally, a paper–based sensor integrated with smartphone RGB analysis enabled rapid, on–site, and instrument–free detection. Mechanism studies revealed that DES coordination with Fe centers suppressed non–radiative decay and enhanced fluorescence. This work provides a robust and intelligent platform for portable monitoring of DES residues, offering significant potential for real–time biohazard surveillance and visual diagnostics in resource–limited settings.
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KEY ENGINEERING MATERIALS
·
2019
·
IF 0
Zhi Feng Zhang,Feng Juan Wang,Wei Sun,Jin Yang Jiang
In this paper, sample of Eu-doped SrTiO3 was synthesized using hydrothermal method, in which the Eu (NO3)3 and Sr (OH)2 were as the Eu and Sr source. X-ray diffraction (XRD), scanning electron microscope (SEM) were used to characterize the structure and ingredient of the as-prepared samples. The results show that high-purity of SrTiO3 was prepared and structure of SrTiO3 without change with Eu doping. Also, performance of cathodic protection of stainless steel was tested in the photoelectricity cell. Furthermore, the mechanism of the improvement by the rare earth was also detected.
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MOLECULES
·
2026
·Vol. 31
·期 19
·3412
·
IF 5.1
Xinyao Su,Wen Guo,Qunming Zhou,Tingting Xie,Lingyan Wu,Shangyang Wang,You Fu,Shurong Li,Wei Peng,Peijun Meng
Cancer theranostics urgently demands multifunctional nanomaterials capable of simultaneously enabling high-sensitivity imaging and multimodal synergistic therapy. In this study, a three-layer core–shell nanocomposite, NaYF4:Yb,Tm@NaGdF4:Eu@NH2-MIL-53(Fe), was designed and synthesized. The NaYF4:Yb,Tm nanoparticle core provides upconversion luminescence upon near-infrared (NIR) excitation and can serve as an excitation source for photodynamic therapy. An epitaxially grown NaGdF4:Eu intermediate shell was introduced to enhance luminescence and provide T1-weighted magnetic resonance imaging (MRI) capability. The outermost NH2-MIL-53(Fe) metal–organic framework shell was subsequently coated to provide potential chemodynamic therapy (CDT) capability. The effects of the Eu3+doping concentration, reaction temperature, reaction time, and oleic acid (OA)/1-octadecene (ODE) ratio on the anisotropic growth into a dumbbell-like morphology were examined to determine the optimal conditions. Under the optimal conditions (10 mol% Eu3+, 300 °C, 60 min, OA/ODE = 4:16), core–shell nanocrystals with regular morphology, uniform size, and the strongest upconversion luminescence were obtained. Polyvinylpyrrolidone (PVP)-mediated surface functionalization successfully induced the in situ growth of the NH2-MIL-53(Fe) outer shell, thereby constructing a three-layer core–shell nanocomposite as a potential theranostic platform. Various characterizations confirmed that the resulting composite integrates upconversion luminescence, paramagnetism, and hydroxyl radical generation capability, suggesting potential for NIR-driven dual-modal imaging-guided synergistic therapy.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Ziyue Chen,Weiyan Lei,Yi Shen,Jiashuang Li
Designed a defect-engineered Mg 2-x Zn x SnO₄:0.01Eu 3+ series (x = 0.01–1.00) based on inverse-spinel Mg 2 SnO 4 to elucidate the synergistic roles of Zn²⁺ and Eu³⁺ in tuning photoluminescence (PL) and persistent luminescence (PersL).The phosphors were synthesized via a high-temperature solid-state reaction and characterized by XRD (Rietveld refinement), XPS, PL/PLE spectroscopy, PersL decay measurements, and three-dimensional thermoluminescence (TL; 290–647 K; 3 K·s⁻¹). As Zn content increases, both the PL and PersL bands red-shift from 500 nm to 550–555 nm, and the emission intensity peaks at x = 0.30.XPS verifies that Sn⁴⁺, Zn²⁺, and Eu³⁺ are the predominant valence states. General-order kinetics (GOK) fitting of the TL curves indicates a shift in the trap population toward medium-to-deep levels, accompanied by stronger carrier retrapping. Mechanistically, Zn²⁺ increases oxygen-vacancy-related defects and lowers defect-associated energy levels. In contrast, aliovalent Eu³⁺ primarily modulates the trap distribution via charge compensation, rather than serving as the main emitting center. The composition at x=0.30 achieves an optimal balance between trap population and defect concentration, enabling a bright, color-tunable afterglow.
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