SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yang Li,Jia-Jia Li,Qing Zhang,Jian-Yong Zhang,Na Zhang,Yong-Zheng Fang,Jinwu Yan,Qinfei Ke
The highly emissive BODIPY (boron-dipyrromethene) have been grafted on the Eu-based metal-organic frameworks (Eu-MOFs) via the covalent F-B bonding using a facile one-pot solvothermal reaction. The fluorescence emission ratio of [email protected] has been applied to construct the ratiometric fluorescence sensor for the F - , H 2 O 2 and glucose detection in water solution and living cells. The produced [email protected] probe provided enhanced sensitivity, higher selectivity and lower lower limits of detection (LOD) for the detection of F - (0.1737 μM), H 2 O 2 (6.22 nM) and glucose (6.92 nM), and 5.96, 6.52 and 6.95 times lower than that for single Eu-MOF, respectively. More importantly, the probe also exhibited the lower biotoxic in living cells for bioimaging and the better visualization performance with multiplex channels. The results indicated the π-conjugated BODIPY derivative not only acted as the surfactant molecule or template agent for preferred growth, but also modulated the fluorescent emissions drastically, and thus induced excellent fluorescent detecting performances.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 8
·1-13
·
IF 6.232
Min Jie,Qu Xiang-Long,Yan Bing
A novel fluorescent and electron-deficient hybrid, N -methylated [Eu (pddb)phen(ox) 0.5 ] n (Eu-MOF-Me) has been prepared via post-synthetic modification. Considering its special luminescent properties and cationic framework, Eu-MOF-Me is developed as a visualized fluorescent probe. Notably, water-stable Eu-MOF-Me exhibits advantages like good structural and fluorescent stability in a wide range of pH value (3.39–10.86), excellent identification ability for F − , I − , and S 2− (it can easily distinguish F − and I − from other halogen ions and can realize naked eye identification of F − , I − , and S 2− ), relatively low detection limits (6.61 μM for S 2− , 7.57 μM for F − ), and reusability. More importantly, it has been utilized for the construction of a Boolean logic gate system. In this system, Eu-MOF-Me serves as the gate, by taking F − , I − , and S 2− as the inputs and fluorescence emission bands (UV380, B437, and R612) as the outputs; some primary logic gates (NOR, IMP, YES, NOT) and the combination of them have been realized. Moreover, we achieved a cascaded logic gate (NOR+OR). For further application, a molecular computing keypad-lock security system has been obtained.
A novel fluorescent and electron-deficient hybrid named Eu-MOF-Me has been prepared via post-synthetic methylation. Considering its special luminescent properties and cationic framework, Eu-MOF-Me was developed as a fluorescent probe for the visual monitoring of important anions. In addition, it was used for the construction of Boolean logic library and a keypad-lock system was achieved
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JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Peixi Hao,Linwen Jiang,Hanlei Zhao,Jiangtao Li,Shiwen Qiu,Hongbing Chen
The MFeO 3 : R 3+ (M = La, Gd; R = Eu, Er, Ho) nanocrystalline powders were successfully synthesized by the sol–gel combustion method using glycine-based gel at a low ignition temperature. The as-burnt products present honeycomb-like structure with many irregular continuous pores due to the releasing of a large amount of gas during the combustion reaction process. The lattice parameters and cell volumes of MFeO 3 :R 3+ (M = La, Gd; R = Eu, Er, Ho) nanocrystalline powders are compared in detail. The magnetic properties of all the samples were studied systematically. The results show that the doping of rare-earth ions enhanced greatly the coercivity of GdFeO 3 and LaFeO 3 as a result of the enhancement of magnetic anisotropy . The influence of doped rare-earth ions on the magnetic properties was summarized. The distinction of magnetism of MFeO 3 :R 3+ (M = La, Gd; R = Eu, Er, Ho) were explained in detail by the intrinsic magnetism of doped rare-earth ions. This work is significant for the application of rare-earth elements in other magnetic materials.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Wenqing Li,Jingyue Zhang,Linhan Fan,Yun Zhao,Changyan Sun,Wenjun Li,Zhidong Chang
Aniline is an organic pollutant with carcinogenicity and teratogenicity, while F - and Hg 2+ are toxic ions that are easily soluble in water. When they are released to the environment, they will pose a threat to human health. Designing a material that can simultaneously detect three types of pollutants is of great significance. In this paper, a novel rare earth metal organic framework material (Eu-MOF) with three-dimensional structure based on 1-methylimidazole-4,5-dicarboxylic acid was synthesized for the first time through solvent thermal method. It has excellent luminescent performance and can be used as a multifunctional fluorescent probe to detect aniline, F - , and Hg 2+ based on photoinduced electron transfer, energy competitive absorption, and ion exchange mechanisms, with detection limits of 1.79 × 10 -8 , 8.13 × 10 -8 , and 8.83 × 10 -7 M, respectively. It is worth noting that Eu-MOF can detect F - and Hg 2+ in real water samples, such as lake water and green tea water, with favorable recovery rates.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Kai Ding,Wenye Deng,Jinyang Li,Ni Ai,Yan Xue,Xianghui Chen,Pengjun Zhao,Weiwei Meng,Aimin Chang,Yongxin Xie
This study synthesized La0.9X0.1AlO3 (X = Eu, Gd, Ho, Tm) and LaAlO3 ceramics by a solid-state method. The characterization of the ceramics revealed that the high degree of lattice distortion induced by variations in the size, mass, and electronegativity of rare-earth elements enhances high-temperature stability, leading to aging drift rates between 0.4% and 2.3% after 500 h at 1000 °C. Furthermore, the emergence of intrinsic defects and dislocations alters the charge conduction mode in LaAlO3, resulting in significant linearity at temperatures above 1000 K. This study further elucidates the transition in the charge conduction mechanism from thermally activated conduction to hopping conduction, which is driven primarily by oxygen vacancies and dislocations. DFT calculations support these findings, demonstrating a reduction in the band gap and increased carrier concentration. This work paves the way for the development of advanced NTC thermistors for reliable temperature monitoring in challenging environments.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xutao Yan,Haifeng Li,Zirui Li,Jihui Sun,Yijian Liu,Jiabao Zang,Li Sun,Meijie Zhang
Eu substituted Ba 3 Co 2- x Eu x Fe 24 O 41 (Co 2- x Eu x Z, x = 0, 0.5, 1) hexaferrites with multilayer nanoplate stacked and thickened along the c -axis were prepared without applying an external magnetic field to improve their microwave absorption performance. The crystal phase, structure and morphology of Ba 3 Co 2- x Eu x Fe 24 O 41 (Ba 3 Co 2- x Eu x Z) hexaferrites and the electromagnetic parameters and microwave absorption performance of Ba 3 Co 2- x Eu x Z hexaferrite/paraffin composites were characterized and analyzed. The maximum effective absorption bandwidth ( EAB max ) of Co 1.5 Eu 0.5 Z reached up to 8.21 GHz (5.37 GHz 13.58 GHz) at a coating thickness of 2.9 mm. Especially, when the coating thickness was only 3.4 mm, its EAB was 7.65 GHz (4.10 GHz 11.75 GHz), almost covering both the C and X bands, showing the excellent low frequency absorption performance. Meanwhile, the electromagnetic wave (EMW) dissipation mechanism of the samples was surveyed and dominated by the dipole polarization, interfacial polarization, natural resonance and exchange resonance. The impedance matching and EMW absorption performance of Ba 3 Co 2- x Eu x Z hexaferrites were finely regulated by Eu substituted Co and the multilayer nanoplate stacked structure.
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JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Yinzhong Liu,Xuechun Yang,Yun Guo,Lingchao Wang,Xiaoshun Wei,Qingjie Wang,Yiyu Qiao,Xiaotao Zhu,Lingli Cheng,Zheng Jiao
n -Butanol, a volatile organic compound with relatively low toxicity, requires precise detection for public health and environmental safety. In this research, metal-organic framework (MOF)-ZnO nanostructures (zinc oxide nano-materials with the utilization of metal-organic frameworks as precursors) doped with rare earth elements (Ce, Eu, and Er) were synthesized via a homogeneous co-precipitation route. The produced samples were comprehensively characterized employing X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) method, X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy to evaluate the morphological, structural, and optical characteristics. The gas-sensing capabilities of the RE (Ce, Eu, Er)-ZnO series of sensors were subsequently assessed in comparison to those of pristine MOF-ZnO by adjusting the doping type and ratio of rare earth elements to optimize the sensor performance. Among the materials tested, the 0.08 wt% Eu-ZnO sensor exhibits the best-of-breed sensitivity and selectivity, achieving the impressive response value of 616.11 and the detection limit of 361.52 ppb working at 230 °C under 100 ppm of n- butanol exposure, this achievement attains 8.7 times greater than that of pristine MOF-ZnO (70.72). Moreover, with the aid of ultraviolet excitation, the performance of the 0.08 wt% Eu-ZnO sensor is further enhanced, with the sensitivity response elevating to 1000.65 and 4.3 times greater than that of pristine MOF-ZnO (231), leading to the lower detection limit of 259.70 ppb at 220 °C. These findings underscore the significant potential of rare earth incorporation and UV irradiation playing as the synergistic strategy to augment the gas-sensing capabilities, preeminently in the detection of low-concentration volatile organic compounds.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xinhan Chen,Gaofan Chen,Ya-Nan Feng,Lizhen Zhang,Yan Yu,Lingyun Li
Developing single-component white-light phosphors remains challenging due to the difficulty in achieving dual emission from mixed-valent activators. Herein, we present a carbon-modulated reduction synthesis (CARS) method to fabricate Eu2+/Eu3+ co-doped La3Si2O8Cl (LSOCl) phosphors without requiring hazardous reducing atmospheres. By modulating carbon content (Eu : C = 1 : 0–2.4), the Eu2+/Eu3+ ratio is effectively controlled, enabling tunable emission from pink to white and yellow under 365 nm UV excitation. The optimized LSOCl:7%Eu (Eu : C = 1 : 1.9) exhibits broadband emission (390–720 nm) with a high color rendering index (Ra = 85.05), cool white light (5489 K, CIE: 0.33, 0.38), and stable performance under varying currents. Additionally, LSOCl:7%Eu (Eu : C = 1 : 1.4) shows excitation-dependent chromaticity shifts: minimal changes under solar-blind UV (250–280 nm) but dramatic variations at 280–350 nm, facilitating rapid detection. A solar-blind UV detector was designed, demonstrating fast response, high resolution (50% CIE shift at 330 nm), and anti-interference capability. The CARS method offers an eco-friendly, scalable route for dual-emission phosphors, showcasing their dual utility in high-quality white LEDs and sensitive UV detection technologies.
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TALANTA
·
2021
·
IF 6.057
Jing Yan,Jingfei Zhang,Min Zhang,Guoyue Shi
Antibiotic residues in aquatic environments have attracted wide attention. Considering the impacts on the ecosystem and human health, it is urgent to develop a rapid method for detecting antibiotic residues in the environment. In this work, a nanoscale lanthanide metal-organic framework Eu(TATB) with a stable red luminescence in aqueous solution is synthesized by the microemulsion method. Sulfamethazine (SMZ) is frequently most used in veterinary medicine as one of sulfonamides. Eu(TATB) can be used for sensitively and rapidly specific recognition of SMZ with low detection limit (0.67 μM) and eminent recyclability. In addition, a paper-based visual system for point-of-care (POC) monitoring SMZ is devised by both using filter paper embedded with Eu(TATB) and our developed portable smartphone-involved imaging cassette. The naked eyes can observe that the red luminescence of the paper sensor gradually fades away at the presence of SMZ. This provides a reliable and effective method for on-site detection of sulfonamide antibiotics in the field of environmental monitoring.
研究领域:
环境科学
·
分析化学
·
材料科学
·
生物技术
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ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Wenying Li,Jiacheng Zhu,Guochong Xie,Yukun Ren,Yue-Qing Zheng
In this study, a system was established for the detection of tetracyclines (TCs) by simply mixing graphene quantum dots (GQDs) and Eu 3+ . The GQDs-Eu 3+ system exhibits both strong emission of GQDs and weak characteristic emission of Eu 3+ upon 360 nm excitation. In the presence of TCs, the luminescence of GQDs was quenched, while the luminescence of Eu 3+ was significantly enhanced. It is worth to mention that the GQDs we prepared possess a lot of carboxyl groups on the surface and edge. This carboxyl groups play an important role in fluorescent enhancement of Eu 3+ . On the basis of this effect, a novel label free ratiometric sensor was developed for the detection of TCs. Under the optimized conditions, linear concentration ranges from 0 to 20 μM for tetracycline was found, and the detection limits was 8.2 nM. This system also exhibited excellent selectivity toward TCs over other antibiotics. In addition, it was successfully applied to the determination of tetracycline in river water and milk samples. The proposed system was simple in design, fast in operation, rapid in response and cost-effective. In view of the advantages, the developed system demonstrates great potential for the detection of TCs in environmental and biological samples.
研究领域:
分析化学
·
环境科学
·
生物分析
·
材料科学
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JOURNAL OF FLUORESCENCE
·
2011
·Vol. 22
·期 2
·729-736
·
IF 1.966
Li Yan-Yan,Yan Bing,Guo Lei
In this paper, the organic ligands TTA and TAA are grafted onto the coupling agent to achieve the organic precursors (TTA-Si, TAA-Si) as first ligand and the organic 4-(4-nitrostyryl)pyridine (Nspy) is synthesized as the second ligand. Both of them are coordinated to the rare ions with the carbonyl group and nitrogen atom respectively. After the hydrolysis and copolycondensation between the teraethoxysilane (TEOS) and the ternary rare earth organic complex via the sol–gel process, the chemical bonded hybrid materials are constructed and characterized in detail. The obtained hybrid materials present superior thermal stabilities and regular and homogenous square blocks microstructure. Among the hybrids Eu(TTA-Si) 3 Nspy shows a more strong characteristic emission and longer lifetime than the hybrids Eu(TAA-Si) 3 Nspy, while hybrids Tb(TAA-Si) 3 Nspy exhibits the stronger characteristic emission and longer lifetime than the hybrids Tb(TTA-Si) 3 Nspy. For Sm 3+ hybrid materials, the photoluminescence of Sm(TAA-Si) 3 Nspy is too weak to find in the characteristic emission spectra, meanwhile, Sm(TTA-Si) 3 Nspy has the excellent luminescent intensity.
研究领域:
材料科学
·
光物理学
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JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Liang Tianmi,Liu Shijian,Ma Wenjin,Tao Xiaoqi
Colla Corii Asini ( CCA ), a traditional food-medicine product, is vulnerable to food safety and market integrity due to frequent adulteration. This study developed a lateral flow assay based on polyethylenimine-functionalized europium metal-organic frameworks (PEI-Eu-MOFs-LFA) for quantitatively detecting donkey DNA to assess the authenticity of CCA , without the need for knowing the types of adulterants. The protonated amino groups on the PEI‑Eu-MOFs surface formed stable complexes with negatively charged single‑stranded DNA (ssDNA) probes. Electrostatic attraction and hydrogen bonding facilitated conjugate formation, leading to fluorescence quenching of the PEI-Eu-MOFs via the inner-filter effect (IFE). This method enables direct analysis after DNA extraction, eliminating the need for additional nucleic acid amplification steps, and completes the entire process in just 60 min. Furthermore, a calibration curve was established between the T/C ratio and the logarithmic value of donkey hide content (2% to 100%). The PEI-Eu-MOFs-LFA exhibited excellent sensitivity and accuracy, with a detection limit of 1.86%, recoveries ranging from 85.70% to 114.63%, and relative standard deviations from 2.48% to 12.59%. Consequently, PEI-Eu-MOFs-LFA demonstrates high sensitivity and accuracy, significantly improving detection efficiency and providing an innovative approach for quality control and market regulation of CCA .
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