BIOELECTROCHEMISTRY
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2025
·
IF 4.5
Longmei Yao,Jiajia Zhi,Wenchang Wang,Qingyi Li,Ding Jiang,Xiaohui Chen,Zhidong Chen
As a synthetic estrogen, diethylstilbestrol (DES) residues in water pose a threat to human health. In this work, a novel electrochemiluminescence resonance energy transfer (ECL-RET) aptamer sensor based on NCDs@Ag 3 PO 4 as a resonance energy transfer donor and Cu 2+ doped Eu MOF (Cu: Eu MOF) as an efficient resonance energy transfer acceptor for the detection of diethylstilbestrol (DES) was proposed for the first time. The aptamer sensor uses Ag 3 PO 4 nanoparticles loaded with nitrogen-doped carbon quantum dots (NCDs) as the ECL emitter, which improves the electron transfer efficiency of the sensor and promotes the generation of SO 4 ·- radicals, thereby improving the luminescence intensity and stability of the ECL sensor. The energy acceptor Cu: Eu MOF binds to the apt on NCDs@Ag 3 PO 4 by complementary base pairing through complementary DNA (cDNA). When DES is present in the sample, DES competes with the energy acceptor. The stronger interaction between DES and apt leads to the shedding of Cu: Eu MOF-cDNA from the electrode and the recovery of ECL signal. Based on this, under optimal conditions, the linear range of the sensor for detecting DES is 1.0 × 10 −13 –1.0 × 10 −6 M, and the detection limit is 7.4 × 10 −14 M (S/N = 3). The developed aptasensor showed excellent recognition ability for residual DES in actual water samples. The sensor has superior measurement ability and potential application value in the field of environmental water quality monitoring.
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高影响因子
Journal of Food Measurement and Characterization
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2025
·
IF 3.3
Jie Mingsha,Zhu Amei,Zhu Bing,Guo Ruipeng,Lan Shengkai,He Jiaxin,Lang Xingang,Bai Yanhong
The overuse of antibiotics leads to significant health risks and environmental challenges. Therefore, selective and sensitive detection of antibiotic residues is a critical issue. Here, a double-emission ratiometric fluorescence probe (Lu-Eu-DPA) was constructed for the selective detection of gentamicin sulfate (GEN), neomycin (NEO), and erythromycin (EM). The Lu-Eu-DPA coordination polymer nanoparticles composed of luminol, the coordinated nuclear metal Eu 3+ , and 2,6-pyridinedicarboxylic acid (DPA). The coordination reaction between luminol molecules and Eu 3+ ions produce the aggregation-induced emission (AIE) effect, while DPA acts as a ligand for the antenna, absorbing energy from the excitation light and then transferring the energy to Eu 3+ . Based on the AIE effect and antenna effect (AE), the fluorescence intensity of Lu-Eu-DPA at 426 nm and 617 nm was correlated with the concentration of GEN, NEO, and EM, and the detection limits of GEN, NEO, and EM were 20, 25, and 48 nmol/L, respectively. The detection capability of the proposed method in pork samples was also studied. In addition, semi-quantitative determination of GEN, NEO, and EM was conveniently and efficiently performed using a smartphone-based visualization method. These results suggested that this probe with good selectivity and specificity was a promising method for swiftly detecting multiple antibiotic residues.
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Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Jiayu Zheng,Longxiao Zhou,Qiufen Liu,Senwei Wu,Yuting Peng,Xiujian Zhao,Shouqin Tian
Ratiometric optical thermometry has emerged as a vital platform for non-contact temperature monitoring in industrial and scientific applications, demanding sensors with high sensitivity, non-invasiveness, and spatial resolution. Although zeolitic imidazolate framework-8 (ZIF-8) possesses attractive thermal stability and structural tunability, its limited luminescence intensity hinders practical thermometric applications. Meanwhile, ZIF-L, a two-dimensional (2D) polymorph of ZIF-8 with identical ligands, remains unexplored for temperature sensing. Herein, we propose a dual-modulation strategy synergizing lanthanide valence engineering with MOF phase control to develop a multi-emission center Eu3+/Eu2+ co-doped ZIF-L film (Eu/ZIF-L). By introducing Eu3+ into ZIF-8 precursors, the partial reduction of Eu3+ to Eu2+ under thermal treatment triggers a structural evolution from 3D ZIF-8 to 2D ZIF-L. The resultant Eu/ZIF-L exhibits dual emission peaks at 450 nm (Eu2+) and 495 nm (ligand-centered), with their intensity ratio (I495/I450) demonstrating remarkable linear temperature dependence over 296–373 K and achieving a relative sensitivity of 1.95% K−1. This work pioneers the integration of valence-state manipulation and MOF phase transition for thermometric optimization, providing a novel paradigm to design advanced ratiometric MOF thermometers for industrial thermal management.
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INORGANIC CHEMISTRY
·
2016
·
IF 4.82
Hui Yang,Chun-Li Hu,Jiang-Gao Mao
The first examples of mixed-anion lanthanide galloborates, namely, Ln2Ga[B3O6(OH)]2[B7O9(OH)2](CH3CO2)2 [Ln = Y (1), Sm (2), Eu (3), Gd (4), Dy (5)], have been obtained through hydrothermal synthesis. The title compounds are isomorphic and belong to monoclinic space group C2/c (No. 15). Their structures possess [B7O13(OH)2] borate layers further bridged with [B3O7] clusters to give a three-dimensional (3D) borate framework displaying two types of rhombus-like B14O14 14-membered-ring (14-MR) channels along the b axis. The Ga3+ ions are octahedrally coordinated and located at one end of the B14O14 14-MR channels, forming small tunnels of B7Ga 8-MRs, which are filled by the LnIII ions. The Ln ions and Ga cations are further held together by bridging acetate anions. It is worth noting that in these compounds there are two different types of borate clusters and two types of anions that are uncommon in the borates reported. Luminescent studies revealed the characteristic emission bands of Ln ions for compounds 2–5, and the luminescent lifetimes are 3.6, 0.86, and 3.05 ns for compounds 2, 3, and 5, respectively. Magnetic measurements suggest that there are antiferromagnetic interactions between magnetic centers for compounds 2–5.
研究领域:
材料科学
·
无机化学
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INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Xiao Zhou,Hongwei Wang,Sha Jiang,Guotao Xiang,Xiao Tang,Xiaobing Luo,Li Li,Xianju Zhou
A series of lanthanide organic complexes, namely, [Ln2PDC3(H2O)3]H2O (Ln = Eu, Tb, EuxTb2–x, H2PDC: pyridine-3,5-dicarboxylic acid), were synthesized via hydrothermal method. Eu-PDC was characterized by single-crystal X-ray diffraction. The powder X-ray diffraction, Fourier transform infrared spectra, and thermogravimetric analysis illustrate that Eu-PDC, Tb-PDC, and EuxTb2–x-PDC complexes are isostructural. All the complexes exhibit strong emission even though water molecules coordinated in the structure. Tunable emission color from green, yellow to red is realized by adjusting the Eu/Tb ratio in mixed EuxTb2–x-PDC complexes. Energy transfer from Tb3+ to Eu3+ is discussed in detail via fluorescence decay and time resolution spectra. The detailed energy transfer process sees that the emitting color of Eu0.15Tb1.85-PDC shifts from green to orange in a time interval of 153–790 μs. In addition, temperature-dependent emission of the Eu0.05Tb1.95-PDC complex indicates that it is a potential solid state material for a luminescence thermometer in the range of 293–333 K. The temperature resolution is less than 0.16 K. The optical properties of the EuTb-PDC complex indicate that it is a multifunctional luminescent material with promising applications in temperature sensing, time resolution imaging, lighting, and displaying.
研究领域:
无机化学
·
材料科学
·
光学
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JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Mingzhou Zhao,Qiong Fu,Peng Du,Yafei Hou,Laihui Luo,Weiping Li
The thermal stable Eu(HCOO) 3 red-emitting crystals were synthesized by a facile hydrothermal route. Both excitation and emission spectra revealed that the prepared crystals can be efficiently pumped by the near-ultraviolet (NUV) light and it can emit brightness red light with admirable color purity of 90.4%. With the help of Judd-Ofelt theory, the optical transition intensity parameters of Eu 3+ ions were evaluated so as to explore its local symmetry performance in the Eu(HCOO) 3 host lattices . The thermal quenching behaviors of the studied samples were investigated through the temperature-dependent emission spectra . Ultimately, a white light-emitting diode (WLED) lamp with good color rendering index (78.2) and correlated color temperature (6386 K) was packaged through coating the tricolor phosphors (BaMgAl 10 O 7 :Eu 2+ blue-emitting phosphor, (Ba,Sr) 2 SiO 4 :Eu 2+ green-emitting phosphor and resultant red-emitting crystals) onto the surface of a NUV chip. These results disclosed the high brightness Eu(HCOO) 3 red-emitting crystals were suitable for NUV chip triggered WLED applications.
研究领域:
材料科学
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光学材料
·
固态照明
·
发光学
·
无机化学
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Foods
·
2022
·Vol. 11
·期 19
·3138
·
IF 5.561
Xiaoyue Yue,Chaoyun Wu,Zijun Zhou,Long Fu,Yanhong Bai
Rapid, facile, and accurate detection of antibiotic residues is vital for practical applications. Herein, we designed a sensitive, visual, and rapid analytical method for sensitive detection of ciprofloxacin and chloramphenicol based on a nanosized rod-shaped Europium metal organic framework (Eu-MOF). The fluorescent Eu-MOF was firstly synthesized by a simple synthetic route at room temperature, which displays a red emission. The mechanisms of detecting ciprofloxacin and chloramphenicol were confirmed to be the inner filter effect (IFE) and photoinduced electron transfer (PET). Under the optimized experimental conditions, the detection limits of the developed method for ciprofloxacin and chloramphenicol detection were 0.0136 and 3.16 μM, respectively. Moreover, the sensor was effectively applied for quantitative determination of ciprofloxacin and chloramphenicol milk samples with satisfactory recoveries of 94.5–102% and 97–110%, respectively. This work developed a new method for rapid detection of ciprofloxacin and chloramphenicol residues. In addition, the established method has potential practical application value for on-site safety regulation on antibiotic residues in animal-derived food.Keywords:fluorescent sensing;antibiotic detection;inner filter effect;photoinduced electron transfer;metal organic framework
研究领域:
分析化学
·
食品安全
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Dongsheng Zhao,Wenqian Li,Rongmei Wen,Nana Lei,Wencui Li,Xin Liu,Xiutang Zhang,Liming Fan
With the introduction of Eu3+ ions as the secondary fluorescent signal reporter and sensing active sites, a dual-emission ratiometric sensor of Eu3+@NiMOF (Eu3+ functional NiMOF) for hippuric acid (HA) detection in urine and serum was fabricated via the postsynthetic encapsulating strategy. Based on the two emission signals at 441 nm (turn-on) and 628 nm (turn-off), the produced Eu3+@NiMOF ratiometric sensor provided enhanced sensitivity, higher selectivity, and 9.7 times lower limits of detection (LOD) for the detection of HA (2.38 μM, 0.42 μg·mL–1) than that of the pristine NiMOF. Considering the high sensitivity and visualization results, further exploration of intelligent applications in the HA sensing process was carried out by constructing a tandem combinational logic gate to improve the practicability and convenience with the help of a smartphone. This work provides a promising approach for developing MOF-based ratiometric sensors to detect biomarkers.
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Gen Li,Yaqi Wang,Min Tao,Siqi Chen,Bozhi Zhou,Quan Li,Xin Li,Heming Deng,Hao Huang,Haoshuang Gu,Yuebin Li
Developing efficient strategies to fabricate planar photoluminescence scintillators is of great importance to explore X-ray detectors with new platform. Rare-earth (RE) doped Lu 2 O 3 thin films are successfully fabricated by mild aqueous phase electrochemical deposition on ITO/glass substrates with low-temperature post-annealing treatment. The as-prepared Lu 2 O 3 :RE 3+ (RE = Eu, Tb and Tm) thin films exhibit steerable thickness, high transparency in the visible-NIR range, and low transmittance at UV band mainly due to the oxygen-metal (O 2- -RE 3+ ) charge transfer processes and the 4f-4f transitions of the RE 3+ . The Lu 2 O 3 :RE 3+ thin films emit intense red, green and blue (RGB) photoluminescence, which mainly correspond to the 5 D 0 - 7 F 2 transition of Eu 3+ , 5 D 4 - 7 F 5 transition of Tb 3+ and 1 G 4 - 3 H 6 transition of Tm 3+ respectively. Moreover, the transparent Lu 2 O 3 :RE 3+ thin films also exhibit high sensitivity and linearity luminescence to the X-ray stimulation in a dose rate from 30 to 160 mGy s −1 . This rapid and energy-saving synthesis show high efficiency to fabricate rare-earth doped thin-film with a tunable optical performance for optoelectrical application in the fields of solar light concentrators, agricultural light conversion thin films, biosensors , photodetectors and especially the X-ray detectors.
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Polymers
·
2022
·Vol. 14
·期 17
·3578
·
IF 4.967
Jiawen Chen,Jun Ye,Mingming Zhang,Jian Xiong
The residual acrylamide in food paper packaging can be transferred into water and food, which will cause harmful effects on human beings. In this paper, a rapid and easily available fluorescent probe based on carboxymethyl cellulose (CMC)/Eu (Ⅲ) nanocomposites was designed to detect the residue acrylamide with high sensibility. The probe could respond in 1 min. The concentration of acrylamide was linearly correlated to the fluorescence intensity of the probe at the emission wavelength of 615 nm in the concentration range of 0.1–100 μmol/L. The limit of detection (LOD) of the probe was 0.085 μg/L, which is lower than the guideline value of the European Union, the U.S. EPA, and the WHO. An experiment was performed to simulate the acrylamide migrating from food-contacting paper materials to different foods, including waterborne food, alcohol beverage, acidic food, and greasy food. The recoveries and RSDs of acrylamide in all samples indicated that the CMC/Eu (Ⅲ) fluorescent probe was efficient for acrylamide detection. The possible mechanism of the probe for acrylamide detection involved both dynamically quenching and static quenching by forming of non-fluorescent substances.Keywords:CMC/Eu (Ⅲ);fluorescence probe;acrylamide;food contacting material
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JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Wenzhi Wang,Jinkai Li,Zhengyang Zhang,Zongming Liu
The new systems of the (Gd 0.95- x Dy 0.05 Tb x ) 2 (WO 4 ) 3 ( x = 0–0.1) and (Gd 0.95- y Dy 0.05 Eu y ) 2 (WO 4 ) 3 ( y = 0–0.2) phosphors have been successfully obtained using the hydrothermal method at 900 °C in this work. The crystal structure, morphology, PL/PLE spectra, fluorescence and decay analysis have been studied in detail via the combined techniques of XRD , FE-SEM, PLE/PL spectra and decay kinetic. The phase-pure of the (Gd 0.95- x Dy 0.05 Tb x ) 2 (WO 4 ) 3 and (Gd 0.95- y Dy 0.05 Eu y ) 2 (WO 4 ) 3 with good dispersions have been formed at the lower sintering temperature of 900 °C. Under 273 nm and 270 nm excitation (the 6 P 7/2 → 8 S 7/2 transitions of Gd 3+ ), the Gd 2 (WO 4 ) 3 :Dy 3+ /Tb 3+ and Gd 2 (WO 4 ) 3 :Dy 3+ /Eu 3+ phosphors exhibit both Dy 3+ (yellow, at 574 nm) and Tb 3+ (green, at 547 nm) as well as Dy 3+ (yellow, at 574 nm) and Eu 3+ (red, at 616 nm) emissions, respectively. The presences of WO 4 2- , Gd 3+ and Dy 3+ excitation bands on the PLE spectra by monitoring the Tb 3+ and Eu 3+ emissions directly provide an evidence of energy transfer of WO 4 2- →Tb 3+ , Gd 3+ →Tb 3+ and Dy 3+ →Tb 3+ , as well as WO 4 2- →Eu 3+ , Gd 3+ →Eu 3+ and Dy 3+ →Eu 3+ , respectively. The quenching concentrations of both two systems are determined to be 7 at% ( x = 0.07 for Tb 3+ ) and 10 at% ( y = 0.10 for Eu 3+ ), and the quenching mechanisms of both two systems are mainly due to the Tb 3+ -Tb 3+ and Eu 3+ -Eu 3+ energy transfers, respectively. The color-tunable emission can be achieved though adjusting the relative content ratios of Dy 3+ /Tb 3+ or Dy 3+ /Eu 3+ , which has been verified by the CIE chromaticity coordinates analysis. The energy transfer efficiencies of Dy 3+ →Tb 3+ and Dy 3+ →Eu 3+ have been calculated, and the energy transfer mechanisms have been analyzed in detail. The (Gd 0.95- x Dy 0.05 Tb x ) 2 (WO 4 ) 3 and (Gd 0.95- y Dy 0.05 Eu y ) 2 (WO 4 ) 3 phosphors with color-tunable emission may have a potential application for w-LEDs.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yunchuan Dai,Pengyu Hu,Tingting Chu,Meihong Niu,Haiqiang Shi,Haiming Li,Zhiwei Wang,Yanzhu Guo
As a novel fluorescent carbon nanomaterial, carbon dots are restricted by their poor fluorescence in the solid state, although they exhibit favorable photoluminescence in solution. N-doped carbon dots (N-CDs) and solid-state fluorescence films were prepared using green and renewable cellulose-derived materials, respectively. The hydrogen bonding network of carboxymethyl cellulose (CMC) inhibits the self-aggregation behavior of N-CDs, which leads to solid-state fluorescence. The N-CDs was initially obtained with CMC as the carbon source, which showed excellent blue fluorescence. Subsequently, the white-emitting films (N-CDs@Eu-MOF/CMC) were successfully constructed by combining the blue fluorescent N-CDs with the red fluorescence of the europium metal-organic framework. The prepared films showed stable luminescence within 30 days and in the heat environment at 120 °C for 3 h. After covering the N-CDs@Eu-MOF/CMC films on the UV-LED chip with ultraviolet emissive at 365 nm, the white light-emitting diodes were obtained, which exhibited excellent color characteristics with the color coordinates, a correlated color temperature, and a color rendering index of (0.31, 0.32), 6580 K, and 92, respectively. The strategy proposed in this work will provide ideas for generating optical luminescent films from biomass and provide guidance for solid-state fluorescence biomass materials.
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