Royal Society Open Science
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2020
·Vol. 7
·期 5
·
IF 2.646
He Bai,Yunjiang Yang,Jinrong Bao,Anping Wu,Yan Qiao,Xueyuan Guo,Mingyuan Wang,Wenxian Li,Ying Liu,Xiaowei Zhu
SiO2@GdPO4:Tb@SiO2 nanoparticles with core-shell-shell structure were successfully synthesized by a cheap silane coupling agent grafting method at room temperature. This method not only homogeneously coated rare-earth phosphate nanoparticles on the surface of silica spheres but also saved the use of rare-earth resources. The obtained nanoparticles consisted of SiO2 core with a diameter of approximately 210 nm, GdPO4:Tb intermediate shell with thickness of approximately 7 nm, and SiO2 outer shell with thickness of approximately 20 nm. This unique core-shell-shell structured nanoparticles exhibited strong luminescence properties compared with GdPO4:Tb nanoparticles. The core-shell-shell structured nanoparticles can effectively quench the intrinsic fluorescence of bovine serum albumin through a static quenching mode. The as-synthesized nanoparticles show great potential in biological cell imaging and cancer treatment.
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高影响因子
JOURNAL OF MATERIALS RESEARCH
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2020
·Vol. 35
·期 13
·1680-1691
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IF 2.502
He Lili,Han Xiao,Ge Chunhua,Zhang Rui,Hou Yufang,Zhang Xiangdong
Hydrothermal carbon microsphere (HTC) is a carbon-based fluorescent material, which can be synthesized by hydrothermal carbonization of glucose. In this article, a series of 4ZnO·B 2 O 3 ·H 2 O:Ln 3+ /HTC (where Ln = Eu or Tb) composites were prepared under hydrothermal conditions. The effects of the glucose concentration on the morphology, photoluminescence (PL) intensity and emission color of Zn 3.64 :Eu 0.24 [B 2 O 7 ]·H 2 O/HTCx and Zn 3.55 :Tb 0.3 [B 2 O 7 ]·H 2 O/HTC y were investigated. The relationship between morphology and PL intensity of composites was discussed. The results revealed that the presence of HTC did not change the original emission color of 4ZnO·B 2 O 3 ·H 2 O:Ln 3+ (where Ln = Eu or Tb) materials, but greatly increased their PL intensity, the sphere-like morphology composites have the strongest PL intensity. The Zn 3.64 :Eu 0.24 [B 2 O 7 ]·H 2 O/HTCx and Zn 3.55 :Tb 0.3 [B 2 O 7 ]·H 2 O/HTC y emit bright red light and green light, respectively, under respective excitation wavelengths. The present research suggests that the 4ZnO·B 2 O 3 ·H 2 O:Ln 3+ /HTC (where Ln = Eu or Tb) composites may be candidates of red and green phosphors for display and lighting applications.
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JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
Ce Tao,Jianqiang Li,Rukang Li
A new series of rare earth bismuth silicates has been synthesized by flux method and solid state reaction . LnBiSiO 5 (Ln = Ce, Tb) crystallizes in a triclinic space group P -1 with cell parameters a = 5.6763(2) Å, α = 105.591(3)° b = 6.7922(3) Å, β = 110.551(3)° c = 6.9593(2) Å, γ = 99.733(3)°, Z = 2. They exhibit a novel three-dimensional structure consisting of zig-zag chains of edge-sharing Ce/TbO 8 polyhedra that are further linked by SiO 4 units and Bi 2 O 8 clusters. The optical band gap (E g ) of TbBiSiO 5 was estimated to be 3.84 eV from UV–Vis-IR diffuse reflectance spectra. Photoluminescence measurements suggest that due to the cooperative interaction of Bi and Tb the excitation bands monitored at 544 nm are shifted towards longer wavelength which may favor commercial UV diode excitation. The magnetic measurements show that TbBiSiO 5 exhibits paramagnetic behavior without magnetic transitions down to 1.8 K.
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TALANTA
·
2024
·
IF 5.6
Yi Xiao,Pengcheng Huang,Fang-Ying Wu
α-Glucosidase, which directly involves in the metabolism of starch and glycogen and causes an increase in blood sugar level, is the major target enzyme for the precaution and therapy of type II diabetes. Based on the previous work, we adopted a post-synthetic modification method to encapsulate Tb 3+ into Ce-MOF nanozyme which owned mixed valence states. Tb@Ce-MOF displayed induced luminescence characteristic and exceptional oxidase-like activity that could oxidize colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue ox-TMB. α-Glucosidase can hydrolyze the substrate l -ascorbic acid-2- O -α- d -glucopyranosyl (AAG) to generate ascorbic acid (AA), which could increase the Ce 3+ /Ce 4+ redox valence mode in Tb@Ce-MOF, leading to the inhibition of the allochroic reaction of TMB and the decreased absorption of ox-TMB at 652 nm. The energy transfer (EnT) process from Ce 3+ to Tb 3+ will enhance due to the increased Ce 3+ /Ce 4+ mode in Tb@Ce-MOF, which will result in an enhanced fluorescence signal of Tb@Ce-MOF at 550 nm. But the addition of inhibitor acarbose will inhibit the above process. We have constructed a dual-mode detection platform of α-glucosidase and its inhibitor via colorimetric and fluorometric method. The linear range of α-glucosidase were 0.01–0.5 U/mL (colorimetric mode) and 0.8–1.5 U/mL (fluorometric mode), respectively, with a detection limit as low as 0.0018 U/mL. Furthermore, our approach was also successfully employed to the analysis of α-glucosidase in serum samples.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Hangqing Xie,Mengke Bai,Anqi Wang,Zi Chen,Feifan Chang,Jiadi Lian,Shiqing Xu
Triplet exciton is both a luminescence quenching factor and an important luminescence sensitization technology solution, which is widely concerned in the field of optoelectronic materials. Since X-ray excited triplet excitons are dissipated through various pathways, there are still huge difficulties in achieving efficient triplet sensitized emission. Here, the antenna ligand is regulated through the carboxyl group, increasing the steric hindrance between the conjugated groups and improving triplet-enhanced radioluminescence (RL) efficiencies of Tb 3+ . The lanthanide metal–organic frameworks (Ln-MOFs) formed by the coordination of Tb 3+ with mellitic acid (MA), pyromellitic acid (PMA) and trimesic acid (TMA) under low temperature preparation conditions. Among them, MA-Tb has a longer spacing between conjugated groups than PMA-Tb and TMA-Tb, and its triplet RL is relatively strongest, with a light yield of 28,000 photons MeV −1 . Mechanistic studies revealed that the RL efficiency of Ln-MOFs is related to the π-π stacking effect in the benzene ring. In addition, the application of MA-Tb in the field of X-ray detection was demonstrated. The RL intensity of MA-Tb has a good linear relationship with the X-ray dose rate, and the detection limit for X-ray reaches 82 nGy/s, which is 66 times lower than the typical medical imaging dose. These results will provide a universal strategy for the design of Ln-MOFs scintillator.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 13
·5688-5695
·
IF 3.269
Xiaoming Xie,Jie Chen,Ye Sheng,Yanhua Song,Xiuqing Zhou,Xiangting Zhang,Zhan Shi,Haifeng Zou,Keyan Zheng
A series of novel color tunable dandelion-like SiO2:Ln3+ (Ln = Eu, Tb) nanophosphors of approximately 70 nm diameter were prepared using a simple hydrothermal route. The phase, time-dependent shape evolution, morphology, sizes, and luminescence properties of the as-prepared products were well characterized by means of X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectrometry, and photoluminescence spectra as well as kinetic decay curves. Under ultraviolet excitation, the Eu3+ and Tb3+ singly doped SiO2 samples showed strong red and green emission, respectively. Furthermore, the luminescence colors of the as-prepared Tb3+, Eu3+ co-doped dandelion-like SiO2 nanophosphors could be altered from green to red, including green-yellow, yellow, orange yellow and reddish orange, by simply adjusting the doping concentrations of Eu3+.
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JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Tang Qianyun,Huang Linling,Chen Tingting,Xie Feifei,Tan Hongyan,Chen Donghua
In this paper, a molecular imprinted metal-organic framework was prepared by a simple one-pot method using lanthanide terbium ions as the metal source, 2-aminoterephthalic acid as the organic ligand, and 4-nitrophenol as the template molecule at 120 °C. The materials of imprinted and non-imprinted metal-organic framework were characterized and analyzed by Scanning Electron Microscope, X-ray photoelectron spectroscopy, X-ray Diffraction, Brunauer-Emmett-Teller Specific Surface Area Analysis and fluorescence methods, etc., respectively. The fluorescence of the imprinted metal-organic framework was quenched by 4-nitrophenol in water, and there was a linear correlation between the fluorescence quenching efficiency of molecular imprinted metal-organic framework and the logarithm of 4-nitrophenol concentration in the range of 10–500 µmol L − 1 . The limit of detection was 3.3 µmol L − 1 (3σ) and the limit of quantitation was 11.0 µmol L − 1 (10σ). The molecular imprinted metal-organic framework was used for the determination of 4-nitrophenol concentration in water samples with the recoveries of 93.5-102.9% and the relative standard deviations less than 3.63%. The molecular imprinted metal-organic framework has the advantages of easy preparation, high stability, good sensitivity and selectivity, which has potential application for the detection of 4-nitrophenol in the environment samples. Graphical abstract
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Liwei Cui,Yiqian Zhang,Weifeng Chen,Jingyi Liu,Heli Zhang,Hongshuai Zhu,Jian Zou,Weidan Chang
The extensive use of fluoroquinolones (FQs) leads to food residues, which present a significant risk to human health. A portable smartphone-assisted detection platform based on Tb/Eu-MOF nanomaterial was established for the detection of FQs, with the enrofloxacin (ENR) serving as a representative sample. Five Tb/Eu-MOFs with different bimetallic proportions were synthesized, and the Tb/Eu-MOFs (3:1) served as the optimal sensing element. The Tb/Eu-MOF nanomaterial suspension demonstrated a color change from orange-red to pale yellow as a result of fluorescence resonance energy transfer with ENR, attaining a LOD of 0.004 μM and a broad linear range of 0.005–25 μM. The Tb/Eu-MOF was incorporated into an agar slice and coupled with a smartphone for detection to improve portability. A smartphone-based agar slice platform was developed with a linear range of 5–150 μM and a LOD of 4.7 μM. This detection platform offers an innovative, low-cost and portable approach for FQs detection.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Liyan Liu,Yufei Zhang,Siqi Liu,Zhongbao Han,Zhan Yu
Tetracycline (TC) residues are frequently detected in food products and pose potential risks to human health, thus driving the demand for rapid and reliable analytical methods. In this study, a terbium-based metal-organic framework (Tb-MOF) constructed from a boronic-acid–containing ligand, 3,5-dicarboxyphenylboronic acid (5-bop), was synthesized via a one-pot hydrothermal route and evaluated as a fluorescent probe for TC. Comprehensive structural and optical characterization confirmed the successful synthesis of the crystalline Tb-MOF and its characteristic strong green emission under UV excitation. Mechanistic studies indicated that the fluorescence quenching of Tb-MOF by TC originates from dynamic quenching processes including the inner filter effect (IFE) and photoinduced electron transfer (PET). The Tb-MOF probe exhibited a linear response to TC in the concentration range of 0 to 60 μmol/L, with a detection limit of 153 nmol/L. Furthermore, the Tb-MOF sensor was successfully applied to detect TC in real-world food samples including milk and beef, yielding satisfactory recovery and accuracy. This work provides an effective alternative strategy for the quantitative monitoring of TC in complex food substrates, highlighting its significant potential for enhancing food safety assurance.
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DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Xiaoqian Dong,Xiaochen Yu,Xu Zhang,Zhehan Zhang,Xiao He,Ruru Wei,Youru Bai,Jibin Fan
Tb-ZnO/reduced graphene oxide (Tb-ZnO/RGO) nanocomposites were prepared by a simple one-step solvothermal method. The samples were characterized by XRD , SEM, XPS, BET, FT-IR, and Raman spectroscopy , and their photocatalytic activities toward different pollutants (RhB, MO, PR, and MB) degradation were evaluated. Tb-ZnO/RGO nanocomposite shows enhanced photocatalytic activity with high kinetic constants (0.04 min −1 ) and good stability. Enhanced charge separation and migration have been analyzed using UV–Vis absorption spectra , PL spectra, and EIS analysis. Improved photocatalytic activity can be ascribed to the smaller band gap, larger specific surface area (28.3478 m 2 /g) and more effective separation and transport of photogenerated carriers by Tb 3+ and RGO. All the results show that the nanocomposite catalyst has a good application prospect in the degradation of pollutants.
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TALANTA
·
2026
·
IF 6.7
Shuping Shi,Yan Zhang,Yu Du,Chuansheng Zhao,Nan Zhang,Zhen Yu,Yue Jia,Qin Wei
Okadaic acid (OA), a potent diarrhetic shellfish toxin produced by marine dinoflagellates, accumulates in shellfish and poses a significant threat to human health by causing severe gastrointestinal illness. Consequently, the highly sensitive detection of OA is of crucial importance. In this study, an electrochemiluminescence (ECL) biosensor for OA detection was developed based on a Tb(Ⅲ)-Cbatpy-MOGs complex and a nucleic acid amplification strategy. The sensor integrates a cyclic DNA walker with the enzymatic assistance of Exonuclease III for accurate target quantification. The ECL intensity showed a strong linear relationship with the logarithm of OA concentration over a wide range, achieving a detection limit as low as 0.16 pg/mL, attesting to its high sensitivity. Furthermore, the biosensor exhibited excellent selectivity, reproducibility and stability, confirming its reliability for practical applications. This work provides a robust and highly sensitive method for OA detection and holds great promise for the practical monitoring of marine toxins.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xiong Wang,Lingwei Zeng,Mengjia Chen,Zhouxi Li,Hu Zhou,Jianxian Zeng,Guoqing Liu,Tao Pang,Xiangcheng Wang,Yi Luo,Jianfeng Tang,Daqin Chen
Impurity doping is considered as a promising route to endow many functional materials with eminent properties, which may extend their applications in many research fields. As for the optical materials, great endeavors have been devoted to the fluorides over the past years, lanthanide orthovanadates receive less attention and focus. Herein, t-LaVO 4 :Ln 3+ (Ln = Eu, Dy, Sm, Tb) nanorods have been modified by the ZrOCl 2 addition, which are prepared through a hydrothermal synthesis technology. XRD, ICP, TEM, FT-IR and luminescence spectroscopy are employed to characterize the product. The morphology and luminescence performance of t-LaVO 4 :Ln 3+ nanorods could be modulated by deliberately control the ZrOCl 2 content. The average length and width of the nanorods decreases along with the increase of the ZrOCl 2 content. With regulating the content to 4 mol%, luminescence intensity are enhanced for several times and the decay lifetimes are prolonged to a certain extent. The growth mechanism and luminescence enhancement are discussed in detail. This report facilitates a novel approach for luminescence enhancement and widens the horizon for growth mechanism of LaVO 4 -based nanocrystals induced by impurity doping.
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