ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 22
·期 8
·1147-1155
·
IF 1.87
Habimana Fabien,Huo Yanxia,Jiang Sai,Ji Shengfu
Europium metal organic framework (Eu-MOF) was synthesized using Europium as metal ion center and 1,3,5-trimesic acid (H 3 BTC) as organic ligand under hydrosolvothermal conditions. The dynamic performance of the Eu-MOF material in adsorption desulfurization processes was investigated using a solution of thiophene/n-octane as sulfur containing quality model oil. The adsorption desulfurization kinetics equations and adsorption desulfurization isotherms of Eu-MOF were also studied. The results have shown that Eu-MOF catalyst has very good adsorption desulfurization abilities under optimum desulfurization conditions of m adsorbent : m model oil ratio of 1:100 and reaction temperature of 303 K. After 4 h of desulfurization reaction, the adsorption rate and the adsorption desulfurization capacity has reached 64.70% and 24.59 mgS/gMOF respectively. The Eu-MOF adsorption desulfurization process of thiophene on Eu-MOF fits well the quasi two level dynamic model using Langmuir isotherm, Freundlich isotherm and Dubinin–Radushkevich isotherm equations. The Dubinin–Radushkevich isotherm can be a suitable description of adsorption process for Eu-MOF absorbent on thiophene/n-octane mode oil. However the Freundlich isotherm equation model with fitting R
2 value closer to 1, can be a better description for the adsorption of thiophene. The adsorption of thiophene over Eu-MOF absorbent has two types of adsorption that occur simultaneously. These are the monolayer physical adsorption and the multilayer chemical adsorption.
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MATERIALS & DESIGN
·
2022
·
IF 9.417
Zi-You Ding,Qing-Guo Xing,Yi-Ran Fan,Qi-Fa Song,Chun-Hui Song,Yingchao Han
Nano calcium phosphate (nCaP), a bone mineral in mammals, shows a promising prospect in biomedicine. Herein, we report a biomimetic mineralization strategy, based on stoichiometric polyacrylic acid (PAA) complexation-precipitation process, to facilitate the development of nCaP as bioimaging agents. As a result, the monodisperse and sub-10 nm europium-doped calcium phosphate nanodots (PAA-Eu:CaP NDs) is controllably obtained with enhanced fluorescence properties, tumor passive targeting and bioimaging ability. Compared with europium-doped calcium phosphate nanoparticles (Eu:CaP NPs), the fluorescence emission, quantum yield and lifetime of PAA-Eu:CaP NDs are significantly improved up to 3.84, 4.48 and 5.59 times, respectively. Deriving from the synergy of surface effect and organic/inorganic hybrid crystal field effect, such CaP matrix brings to local asymmetry environment and distinguished anti-quenching for Eu 3+ ion. The strongest radiance signal is improved to 117 % for in vivo imaging; moreover, the tumor accumulation is obviously increased to 5.15 times, and 7.09 times for tumor permeability. The accumulation is decreased 80.2 %, 79.4 % and 70.2 % in liver, spleen and lung suggesting lower clearance by mononuclear phagocyte system, while it’s increased up to 15.4 times in kidney indicating higher renal clearance. Eventually, it’s convinced that this study can provide help for promoting CaP application in nanomedicine.
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Journal of Materials Chemistry C
·
2023
·Vol. 12
·期 4
·1430-1439
·
IF 6.4
He Yuan,Shilin Jin,Song Zheng,Rong Xie,Tao Pang,Bin Zhuang,Feng Huang,Daqin Chen
In the last five years, significant progress has been achieved in incorporating trivalent lanthanide (Ln3+) ions into CsPbX3 halide perovskite nanocrystals (PeNCs), combining superior optoelectronic performance of semiconductors with abundant Ln3+: 4f–4f transitions. However, doping divalent europium (Eu2+) with parity-allowed 5d–4f transition inside CsPbX3 remains unexplored. Herein, we develop a new class of dual-emitters based on Eu2+-doped CsPbCl3 PeNCs. Narrowband violet emission and broadband orange emission assigned to the respective exciton recombination and Eu2+: 5d → 4f transition are concurrently observed. Steady/transient-state photoluminescence (PL) spectra, time-resolved PL (TRPL) spectra and femtosecond transient absorption (fs-TA) spectra evidence independent dual-emissions without exciton-to-Eu2+ energy transfer, which is attributed to the preferred location of Eu2+ on the surface of CsPbCl3. As a consequence, exciton-longitudinal optical phonon interplay and surface ligand–Eu2+ coupling in the as-prepared Eu:CsPbCl3 PeNCs are verified based on temperature-sensitive spectroscopic analyses, together with first-principles density functional theory (DFT) calculations and crystal-field calculations. These findings provide fundamental insights into the design of novel lanthanide-doped halide perovskite emitters for versatile optoelectronic applications.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.7
Hang Zheng,Zhuyao Li,Dandan Tang,Hao Peng,Ying Dai,Zhi Gao,Feiqiang He,Kai Guo,Limin Zhou,Zihao Yan,Zhirong Liu
The selective separation of rare-earth elements (REEs) from uranium tailings is essential for radioactive waste management and the sustainable development of nuclear energy. This study demonstrates the highly selective electrochemical separation of erbium (Er) and europium (Eu) employing a liquid zinc cathode in molten LiCl-KCl. Through a suite of electrochemical techniques coupled with semi-integral and semidifferential analyses, we systematically elucidated the reduction pathways, product solubility, and underpotential deposition behavior of Er(III) and Eu(III) on the liquid Zn electrode. Electrochemical impedance spectroscopy (EIS) revealed that the exchange current density increases while the charge transfer resistance decreases with increasing temperature. The diffusion coefficient of Er in liquid Zn, determined by anodic chronopotentiometry (ACP), was 1.96 × 10–5 cm2 s–1, which aligns well with the value determined from molecular dynamics (MD) simulations (3.067 × 10–5 cm2 s–1). Galvanostatic electrolysis achieved an Er extraction efficiency of 99.2%, an Er/Eu separation factor of 312, and a current efficiency of 84.50%, with the residual Eu being subsequently recoverable. This work provides a theoretical foundation and a viable technological pathway for the precise separation of REEs from uranium tailings and secondary resources, contributing to the closed nuclear fuel cycle and the development of green mining.
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Food Analytical Methods
·
2026
·Vol. 19
·期 7
·209
·
IF 3
Xie Mingmeng,Sun Xiaodong,Wen Zijun,Jiang Xinhui,Mao Qiu,Li Siqiao,Wang Wei,Zhang Zhengwei
The widespread use of acetamiprid (ACE) poses increasing threats to food safety and human health due to its environmental persistence and potential toxicity. Herein, a fluorescent europium-based metal–organic framework (Eu-MOF) was synthesized via a facile room-temperature direct mixing strategy, which serves as a rapid and selective fluorescent probe for ACE detection. The dual-ligand Eu-MOF exhibited intrinsic multi-emission properties, with a dominant red fluorescence at 616 nm that is selectively quenched upon ACE exposure. Under optimized conditions, the sensor showed two linear response ranges (0.01–6 and 6–20 µg/mL) with a detection limit as low as 3.03 ng/mL. Mechanistic investigations reveal that the quenching is primarily governed by the inner filter effect (IFE), supported by spectral overlap and unaltered fluorescence lifetime. The probe demonstrates high specificity against common interfering substances and enables accurate quantification of ACE in complex matrices such as apples and oranges, with satisfactory recovery rates (94.35–100.6%) and low relative standard deviations (≤ 1.96%). This work provides a promising platform for rapid, low-cost, and highly sensitive monitoring of pesticide residues in food safety surveillance.
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Advanced Optical Materials
·
2026
·
IF 7.2
Guangxu Zhao,Yunhai Wang,Jing Sun,Hao Yu,Jingjing Zhang,Guishan Liu
Iron is an essential trace element, and its excessive Fe 3+ accumulation induces oxidative stress and leads to severe biological toxicity. The development of highly sensitive and selective platforms for Fe 3+ detection is therefore crucial in biomedical and environmental monitoring. Alumina fiber, an important inorganic non-metallic material, exhibits excellent thermal resistance, oxidation stability, and chemical durability. In this work, a fluorescent alumina fiber (AF@(Eu)BTC) is successfully constructed by In Situ assembling europium complexes onto the surface of alumina fibers. The lanthanide complexes are uniformly distributed as fine particles on the fiber surface. Under UV excitation, AF@(Eu)BTC exhibits a strong red emission at 614 nm, corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ . The fluorescence is significantly quenched in the presence of Fe 3 + ions. The detection limits (LOD) for Fe 3+ are determined to be 0.060 µM in aqueous solution and 0.085 µM in ethanol solution. This work demonstrates a new strategy for constructing highly sensitive fluorescent platforms for Fe 3+ detection and offers new prospects for the application of functionalized alumina fibers in sensing technologies.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 8
·484
·
IF 3
Dai Wei,Dai Ying,Zhang Di,Daniel Jesse,Zhong Xing,Li Zhuyao,Tao Qinqin
Radioactive wastewater containing high concentrations of radionuclides threatens ecosystems and human health. Developing environmentally friendly adsorbents with high enrichment efficiency and ease of solid–liquid separation is essential for removing europium from wastewater. In this study, three amide podand derivatives with different alkyl chain structures were loaded onto polyacrylonitrile via electrospinning, yielding DODGA@PAN, DPDGA@PAN, and DEHDGA@PAN nanofibers. The presence of two carbonyl oxygens and one ether oxygen in these materials enhances coordination with trivalent metal ions, making them highly efficient in europium removal.In reuse tests, DODGA@PAN and DPDGA@PAN maintained strong performance, with only 3.84% and 3.87% decreases after five adsorption–desorption cycles, respectively. In contrast, DEHDGA@PAN, due to its branched structure, exhibited higher adsorption capacity but lower reusability. This branched structure increased porosity, improving adsorption while also causing deformation, reducing its durability. Europium removal efficiency varied with changes in pH, temperature, time, and initial concentration. The Langmuir isotherm model confirmed effective europium adsorption by all three nanofibers. Kinetics indicated chemisorption, while thermodynamics showed the process was endothermic and spontaneous.
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OPTICAL MATERIALS
·
2014
·Vol. 36
·期 9
·1520-1524
·
IF 2.075
Ke Tang,Qianmin Ma,Qingguang Zhan,Qianming Wang
A new kind of europium 2,6-Pyridinedicarboxylic acid complex was synthesized and immobilized in titania via modification of this network. Then a europium luminescent hybrid material was fabricated, which gave prominent red emission. More importantly, this target material exhibited highly selective and rapid quenching effect to copper ion in contrast with Ca 2+ , Na + , K + , Ni 2+ , Zn 2+ , Mn 2+ , Ag + and Fe 3+ in pure water. The europium containing titania hybrid material could be promising for the fabrication of functional sensing devices.
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INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Feng Guo,Duo-Fu Li,Fang Gao,Kai Xu,Jun Zhang,Xiu-Guang Yi,Dong-Ping Li,Yong-Xiu Li
Luminescent lanthanide cages have many potential applications in guest recognition, sensing, magnetic resonance imaging (MRI), and bioimaging. However, these polynuclear lanthanide assemblies’ poor stability, dispersity, and luminescence properties have significantly constrained their practical applications. Furthermore, it is still a huge challenge to simultaneously synthesize and design lanthanide organic polyhedra with high stability and quantum yield. Herein, we demonstrate a simple and robust strategy to improve the rigidity, chemical stability, and luminescence of an Eu(III) tetrahedral cage by introducing the conjugated planar auxiliary phen ligand. The self-assembled tetrahedral cage, (Eu4L4)(phen)4 [L = (4,4′,4″-tris(4,4,4-trifluoro-1,3-dioxobutyl)-triphenylamine), phen = 1,10-phenanthroline], exhibited characteristic luminescence of Eu3+ ions with high quantum yield (41%) and long lifetime (131 μs) in toluene (1.0 × 10–6 M). Moreover, the Eu(III) cage was stable in water and even in an aqueous solution with a pH range of 1–14. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and cellular imaging revealed that the Pluronic F127-coated hybrid material, (Eu4L4)(phen)4@F127, exhibited low cytotoxicity, good biocompatibility, and cellular imaging ability, which may inspire more insights into the development of lanthanide organic polyhedra (LOPs) for potential biomedical applications.
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ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Mengjiao Mo,Xueshen Wang,Lingyue Ye,Yaoquan Su,Yang Zhong,Lingzhi Zhao,Yunyun Zhou,Juanjuan Peng
Tetracyclines (TCs), as one of the broad-spectrum antibiotics, are widely used to treat bacterial infections. The residues of TCs in animal-origin foods and drinking water have raised safety concerns and affected the public health. Thus, there is a high demand to develop a simple and rapid method for the detection of TCs. In this work, we developed a ratiometric luminescence probe for the sensitive and visualized detection of TCs. Specifically, tannic acid-stabilized copper nanoclusters (TA-CuNCs) with blue emission at 433 nm were synthesized. The luminescence of TA-CuNCs attenuated partially by the europium ions (Eu 3+ ) due to the aggregation-induced quenching. When TCs were added to the TA-CuNCs-Eu 3+ system, the luminescence of TA-CuNCs at 433 nm can be further quenched by the inner-filter effect, and the characteristic luminescence of Eu 3+ at 617 nm emerged due to the formation of Eu 3+ -TCs complex. The ratio of the luminescence at 617 nm–433 nm increased linearly to the concentration of TCs. Additionally, we demonstrated the detection of oxytetracycline in real samples such as tap and lake water, milk, pharmaceutical industry wastewater, honey and soil extract with high recovery rate (97.25%–103.44%). Furthermore, a portable paper device is fabricated by the luminescent probe to conduct the on-site analysis of TCs.
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ANALYTICAL BIOCHEMISTRY
·
2023
·
IF 2.9
Qiao Lv,Pei-Yu Jiang,Jun-Mei Xia,Long-Hui Liang,Bo Chen,Yang Yang,Long Yan,Hui-Lan Yu,Chang-Cai Liu
The retrospective detection of organophosphorus nerve agents (OPNAs) exposure has been achieved by the off-site analysis of OPNA-human serum albumin (HSA) adducts using mass spectrometry-based detection approaches. However, few specific methods are accessible for on-site detection. To address this, a novel immunofluorescence microfluidic chip (IFMC) testing system combining europium chelated microparticle (EuCM) with self-driven microfluidic chip assay has been established to unambiguously determine soman (GD) and VX exposure within 20 min, respectively. The detection system was based on the principle of indirect competitive enzyme-linked immunosorbent assay. The specific monoclonal antibodies that respectively recognized the phosphonylated tyrosine 411 of GD-HSA and VX-HSA adducts were labeled by EuCM to capture corresponding adducts in the exposed samples. The phosphonylated peptides in the test line and goat- anti -rabbit antibody in the control line were utilized to bind the EuCM-labeled antibodies for signal exhibition. The developed IFMC chip could discriminatively detect exposed HSA adducts with high specificity, demonstrating a low limit of detection at exposure concentrations of 0.5 × 10 −6 mol/L VX and 1.0 × 10 −6 mol/L GD. The exposed serum samples can be qualitatively detected following an additional pretreatment procedure. This is a novel rapid detection system capable of discriminating GD and VX exposure, providing an alternative method for rapidly identifying OPNA exposure.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 11
·1-9
·
IF 5.7
Xiong Ya,Yang Weiqiang,Huang Shengxiu,Chen Xiaoping,Wang Qingxiang,Ni Jiancong,Lin Zhenyu
Metal–organic gels (MOGs) emerged as an attractive luminescent soft material for electrochemiluminescence (ECL). In this work, a cathodic ECL-activated europium metal–organic gel (Eu-MOG) has been synthesized by a facile mixing of Eu 3+ with 4′-(4-carboxyphenyl)-2,2′:6′,2′′-terpyridine (Hcptpy) under mild conditions. The prepared Eu-MOG is highly mesoporous for co-reactant permeation to produce an ultra-stable and high-efficient ECL, based on the antenna effect of Eu 3+ coordinating with Hcptpy. Moreover, dipicolinic acid (DPA) can competitively coordinate with Eu 3+ instead of water molecules, producing an enhanced ECL signal. Therefore, an ECL enhancement assay was developed for DPA detection. There was a linear relationship between the ECL intensity and the logarithmic concentration of DPA in the 0.01–1 μM range, and the detection limit is 7.35 nM. This work displays the promising application of Eu-MOG in the ECL field, opening a broad inspection for seeking a new generation of ECL luminophores. Graphical Abstract
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