SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Xingbo Ren,Wei Zhang,Yu Wang,Yulong Xu,Yue Wang,Xuwei Chen
Tetracycline residues have raised widespread concern, among which oxytetracycline (OTC) has attracted particular attention because of its potential risks to human health. A sensitive analytical method for detecting tetracycline residues in complex samples is thus needed. Herein, a novel fluorescent sensing platform based on an europium(III) (Eu 3+ )-functionalized covalent organic frameworks (TpBy-COF) for the selective detection of OTC is developed. The fluorescence of TpBy-COF@Eu is hardly observed due to the non-radiative decay from coordinated water molecules. However, the fluorescence signals of TpBy-COF@Eu-based sensing platform is significantly enhanced with the introduction of OTC, attributed to the specific displacement of coordinated water molecules by OTC, which acts as an effective antenna ligand by transferring energy to the excited states of Eu 3+ ,thereby sensitizing its characteristic red emission. Moreover, this TpBy-COF@Eu-based sensing platform exhibits the favorable sensitivity and selectivity for OTC monitoring with a low detection limit as low as 0.12 μmol/L. The TpBy-COF@Eu-based sensing platform is successfully validated in real samples, demonstrating the practical potential for OTC monitoring in complex matrices.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Peng Lin,Junpu Yang,Weinan Sun,Zhonghui Liao,Xian Zeng,Guobin Yu,Zhiguo Li,Fangbo Zhao,Yongxin Li,Jian Lin
Metal–organic frameworks (MOFs) have recently emerged as promising scintillation platforms owing to their highly tunable architectures, versatile photophysical properties, and ability to incorporate high-Z elements and luminescent centers into a single lattice. In this study, we present a Bi-based MOF, Bi-ndc, along with its Eu-doped derivative, Eu@Bi-ndc, and provide a comparison of their scintillation characteristics. Bi-ndc, constructed from high-Z Bi3+ metal nodes and π-conjugated naphthalenedicarboxylate organic linkers, exhibits ligand-centered radioluminescence but suffers from inefficient utilization of triplet excitons. The doping of Eu3+ into the framework activates an antenna-type sensitization pathway in which linker triplet states transfer energy to Eu3+, thereby enabling effective harvesting of both singlet and triplet excitons. Consequently, Eu@Bi-ndc displays enhanced X-ray–excited luminescence, achieving a detection limit of 6.36 μGy s–1, which is 111-fold lower than that of Bi-ndc. Beyond X-ray detection, Eu@Bi-ndc represents the second MOF material to exhibit a measurable β-ray scintillation spectrum and the second example of a lanthanide-based MOF β-ray scintillator. Under β-ray irradiation from a 90Sr–90Y source, Eu@Bi-ndc exhibits distinct Eu3+ emission signatures, outperforming Bi-ndc in terms of scintillation efficiency. This work underscores the critical role of lanthanide doping in enhancing the scintillation performance of MOF-based materials.
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Analytical Methods
·
2025
·
IF 2.6
Ruixue Sun,Chao Zhang,Lubin Hua,Xiaojing Kang,Lianpeng Lv,Hui Si,Yang Zhou,Hailiang Yang,Bing Wang
Leather artifacts represent a vital part of cultural heritage, embodying centuries of craftsmanship and artistic tradition. Conventional detection methods often suffer from limitations including inadequate accuracy and large sample requirements, hindering non-destructive analysis. To address these challenges, this study targets the leather-specific protein collagen through its characteristic peptide sequence (BLG, “TPEVDKEALEKC”). A specific anti-BLG-goat antibody was developed and conjugated with europium-doped fluorescent microspheres to create a competitive fluorescence immunochromatographic assay (FIA) strip for rapid, on-site species identification of leather. Systematic optimization yielded a sensitive, stable, and reproducible assay with a detection limit (LOD) of 1.0 μg mL−1 for the target protein. The assay strip provides visually interpretable results within 15 min under handheld portable UV light, enabling the determination of animal origin directly at archaeological sites or in museums. Therefore, this FIA not only enables sensitive microscopic detection of leather artifacts but also shows great promise for on-site analysis at archaeological sites. This method offers a novel and practical solution for protein-based cultural relic analysis.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Mi Yuan,Mingxuan Li,Pengchen Su,Long Yu,Yunfei Lu,Mingtai Sun,Chao Yuan,Mingshun Li,Suhua Wang
Development of accurate and efficient TCs residue analysis methods is of great significance for the protection of environment, food safety and public health. Herein, a dual-responsive ratiometric fluorescence sensor being capable of simple and sensitive detection of tetracycline (TC) was presented, which was constructed by immobilizing europium ions (Eu 3+ ) onto the mercaptopropionic acid stabilized copper nanoclusters (MPA-Cu NCs). In the presence of TC, the red fluorescence of Eu 3+ was enhanced through antenna effect (AE), while the green fluorescence of MPA-Cu NCs was quenched through internal filter effect (IFE), leading to an obvious fluorescence color evolution from green to red for the probe solution. In addition to successful design of a smartphone-assisted colorimetric analysis platform for portable detection, a logic gate device capable of intelligently monitoring TC concentration is also designed.
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Soft Matter
·
2021
·Vol. 17
·期 10
·2815-2822
·
IF 3.679
Meng Sun,Qintang Li,Xiao Chen
Deep eutectic solvents (DESs) with excellent physicochemical properties similar to ionic liquids and biocompatibility are potential solvent candidates for designing novel lanthanide luminescent soft materials. In this paper, the fabrication and characterization of such luminescent gels in three choline chloride (ChCl)-based DESs through self-assembly of the sodium cholate and europium nitrate are presented. The microstructure and gel-like nature of the obtained eutectogels were explored and confirmed by scanning electron microscopy and rheology measurements. While Fourier transform infrared spectroscopy and small-angle X-ray scattering were used to analyze the gel formation mechanism, which was considered to be synergistically driven by metal coordination, hydrogen bonding and solvophobic interactions. All three eutectogels exhibited good photophysical properties. Among these, the one formed in ChCl/urea DES was found to possess the strongest mechanical strength. While the one formed in ChCl/glycerol DES exhibited the longest luminescence lifetime and quantum efficiency. The obtained results demonstrate the possibility of using DESs to construct lanthanide luminescent soft materials or control their properties through the choice of hydrogen-bond donor molecules.
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MINERALS ENGINEERING
·
2021
·
IF 4.765
Wanqing Lin,Zhigang Zhao,Fan Yang,Zhaoli Liu,Fengzhi Tan,Meiying Xie,Ying Ma,Lingyi Meng
In this paper, a novel crystalline adsorbent MIL-101-DGA (DGA: Diglycolic Anhydride) is synthesized, which can change the order of traditional rare earth separation. This study is different from previously rare earth separation materials in which it can separate europium (III) first from other rare earth ions. The experiments result show that the separation coefficient (β) of preferentially separated europium (III) and other rare earth ions could reach 53.055, and the maximum adsorption capacity in the experiment was 33 mg/g. Density functional theory was used to calculate the absolute hardness of MIL-101-DGA from the perspective of hard-soft-acid-base theory, which explained the selective adsorption mechanism. Using MIL-101-DGA as an adsorbent, it can effectively recover Eu from the metal impurities Al, Ca, Cu, Mn, Zn and Y from the simulated phosphor leaching solution and has excellent recyclability. In summary, we believe that MIL-101-DGA is a new type of adsorbent that can effectively separate europium from rare earth and transition metal ions.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yue Wang,Bin-Bin Chen,Ya-Ting Gao,Lei Jiang,Jian Lv,Shuai Chang,Ruo-Can Qian,Da-Wei Li
Excellent photocatalysts are highly desirable for clean energy and pollutant treatment. Carbon dots (CDs)-based composite photocatalysts have been widely studied and utilized in catalytic fields. However, the preparation of the photocatalysts with high catalytic activity still faces a great challenge. Herein, white-light-driven CDs-based porous europium micro-networks (CDs@P-Eu-MNs) composite photocatalysts are prepared by a facile in-situ growth strategy. CDs can affect the morphology and produce a large number of porous structures of CDs@P-Eu-MNs. Importantly, the introduction of CDs not only increases the light absorption, but also promotes the separation of photogenerated charge carriers, and thus improve photocatalytic performance of CDs@P-Eu-MNs composites. CDs@P-Eu-MNs show the highest photocurrent density, which can be used for the highly-efficient photodegradation of rhodamine 6G dyes with almost 95% degradation rate under low power white light (20 W) without any radical generating agents such as H 2 O 2 . Therefore, this new and efficient CDs@P-Eu-MNs photocatalyst will have a great application prospect in water pollution treatment.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2019
·Vol. 321
·期 1
·161-167
·
IF 1.186
Jiang Min,Xiao Xilin,He Bo,Liu Yong,Hu Nan,Su Changlin,Li Zhiyang,Liao Lifu
In this paper, we report a method for the determination of uranium (VI) based on the using of a surface fluorescence sensor containing a europium (III) complex. The sensor was prepared by immobilizing the Eu(III)-salophen complex on a glass slide surface through Si–O covalent bonds. The sensor can generate strong surface fluorescence as a result of the Cation–Cation Interaction between U (VI) and Eu(III). We used this property to design a surface fluorescence sensing method to detect U (VI). Under suitable conditions, the linear range was 0.02–5 nmol mL −1 and the detection limit was 8 × 10 −3 nmol mL −1 . This method was successfully used in determine U (VI) in real samples with a recovery rate between 99.5 and 103.5%.
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INORGANICA CHIMICA ACTA
·
2013
·
IF 1.687
Yan-Jing Gu,Bing Yan
The synthesis of organics 9-hydroxyphenalenone (HPO), 2-methyl-9-hydroxyphenalenone (MHPO), 6-hydroxybenz[de]anthracen-7-one (HBAO), 5-amino-1,10-phenanthroline (phen-NH 2 ) and its functionalized mesoporous MCM-41 by covalent band are reported, as well as those of Europium (III) hybrid mesoporous materials, EuL 3 phen-MCM-41 (L = HPO, MHPO, HBAO). The photoluminescence and microstructural properties are characterized, and the XRD and BET results revealed that all of these hybrid materials have uniformity in the mesostructure. It is worth noting that the excitation spectra of these hybrid materials have a broad absorption, which occupies from UV to visible region (250–475 nm). Upon ligand-mediated excitation with the visible light, the low efficient energy transfer exhibit between the organic ligands and europium(III) ion under visible excitation, but the maximum wavelength (456 nm/457 nm/451 nm) located at blue light region, which is in consistent with the blue LED light, then might be a feasible alternative in producing time-resolved luminescence under LED-excitation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 6
·5715-5722
·
IF 1.798
Tao Chaoyou,Yuan Xiaodong,Yin Qiang,Yan Hongwei,Ni Wei,Yan Lianghong,Zhang Lin
Europium(III) complexes have attracted tremendous interests from scientists for their excellent properties and their important potential applications in the fields of organic light emitting diodes, biological labeling, laser media. In this paper, two novel europium(III) complexes having 2-thenoyltrifluoroacetylacetone (tta) as the first ligand and the second ligands bearing benzimidazole groups were synthesized and characterized by FT-IR, UV–Vis, 1 H-NMR, and elemental analysis. The photoluminescent properties of complexes in the solid state, in ethanol solution and embedded in poly(methyl methacrylate) (PMMA) were investigated. All europium(III) complexes exhibited strong luminescent intensity, high quantum yields (Φ) and long luminescent lifetimes. The intrinsic luminescent quantum yields (Φ LN ) and the stimulated emission cross-section (σ p ) of complexes were obtained based on the emission spectra and luminescent lifetimes of 5 D 0 excited state for europium(III) ion. All europium(III) complexes exhibited relatively high intrinsic luminescent quantum yields. In view of σ p values, which are the same order as the values of Nd-glass laser for practical use, these europium(III) complexes may find potential applications in the field of high-power laser media.
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RSC Advances
·
2017
·Vol. 7
·期 14
·8661-8669
·
IF 3.108
Xiangyang Song,Yue Ma,Xiao Ge,Hongjian Zhou,Guozhong Wang,Haimin Zhang,Xiaoxian Tang,Yunxia Zhang
Although phosphate plays important roles in aquatic ecosystems as an indispensible nutrient, excessive levels are responsible for severe environmental issues. Hence, it is of considerable significance to develop highly sensitive and reliable probes for the detection of phosphate with the purpose of monitoring of water quality security and early-warning of eutrophication occurrence. In this work, uniform europium-based infinite coordination polymer (Eu-ICP) nanospheres are rationally constructed by a facile one-step solvothermal treatment. It is demonstrated that the newly developed sensing platform features excellent fluorescence properties, which can be efficiently quenched by the presence of phosphate ions (Pi). Typically, a good linearity exists between the decrease in fluorescence intensities and the Pi analyte content ranging from 2–100 μM, allowing the reliable determination of Pi concentration. Accordingly, the detection limit is estimated to be 0.83 μM, which is far below the detection requirement of phosphate discharge criteria in the water environment. It is noteworthy that the prepared Eu-ICP probe displays a specific recognition towards Pi, and is hardly affected by other possible existing species in natural water. More importantly, the proposed fluorescent probe can be utilized for reliable determination of Pi concentration in real water with acceptable recoveries, highlighting its feasibility in complicated environmental samples. Further research suggests that the underlying sensing mechanism is based on the strong affinity between europium centers and Pi, resulting in the collapse of the inherent structure of Eu-ICP and the corresponding fluorescence quenching. These findings show that the developed Eu-ICP probe holds great prospect in monitoring water quality and early warning of eutrophication based on the unique features associated with this simple preparation procedure, high selectivity, and excellent sensitivity.
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ChemistrySelect
·
2024
·Vol. 9
·期 21
·e202401644
·
IF 1.9
Qi Shi,Pan Cao,Siqi Huang,Zhixin Ren,Yuguang Lv,Tai Peng
Graphical Eu/g-C 3 N 4 composites were prepared and the optimum elemental doping ratio was proved experimentally. The good photocatalytic activity of the composites was determined by the degradation rate of antibiotic drugs under visible light irradiation and explore its photocatalytic mechanism. Graphene-like materials were prepared by thermal copolymerization using melamine as a precursor, and chemical methods successfully synthesized Eu/g-C 3 N 4 composites containing different europium elements. Degradation rates of 64.3 %, 91.9 %, and 72.8 % were observed in the photocatalytic degradation of Pefloxacin, Enrofloxacin, and Ciprofloxacin under visible light (λ>550 nm). Determine the photocatalytic activity of the composite. When the doping amount was Eu/g-C 3 N 4 -2 with k=0.0135 min −1 , four times greater than that of g-C 3 N 4 , the best photocatalytic effect was obtained. Repeated studies revealed that the Eu/g-C 3 N 4 composite samples had good cycle stability, and a potential degradation process was postulated.
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