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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PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Xinzhuang Wei,Yaming Zhao,Huifeng Zhang,Qiong Jia
With the extensive use of neonicotinoid pesticides like thiamethoxam (TMX), there is a growing need to develop sensitive and selective methods to monitor its residue levels. In this study, we developed a fluorescence sensor based on terbium/cerium metal-organic framework combined with molecularly imprinted polymer (Tb/Ce MOF@MIP) for TMX detection. Through systematic optimization of synthesis conditions and detection conditions, the sensor was successfully employed for the determination of TMX, exhibiting high selectivity, along with a linear detection range of 1–50 μM and a limit of detection of 0.8 μM. In addition, the practical applicability of the sensor was validated in real samples including apples, tea, and soil, and the accuracy was assessed through recovery experiments.
研究领域:
分析化学
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环境监测
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食品安全
·
材料科学
·
农药残留检测
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiaxin Wang,Yifan Wang,Huixin Qiu,Huixia Zhu,Zhenyu Wang,Yue Li,Youshun Jia
We systematically study the crystal structure, magnetism and cryogenic magnetocaloric effect (MCE) in heavy rare-earth RE 6 MoO 12 ( RE = Tb, Dy, Ho, and Er) compounds. All RE 6 MoO 12 compounds belong to a cubic structure (space group: F m 3 − m ). Meanwhile, magnetic measurements illustrate that RE 6 MoO 12 compounds exhibit an antiferromagnetic (AFM) phase transition. It is proved by the slope of the basic Arrott-plots that all compounds undergo second-order magnetic phase transition (SOMT). In addition, under the applied magnetic change ΔH = 7 T, the maximum magnetic entropy change (-∆ S M max ) near Néel temperature ( T N ) is evaluated to be 12.9, 20.7, 21.1, and 21.2 J/kg K, and relative cooling power ( RCP ) is evaluated to be 308.3, 473.9, 506.2, and 381.4 J/kg for Tb 6 MoO 12 , Dy 6 MoO 12 , Ho 6 MoO 12 , and Er 6 MoO 12 , respectively. Consequently, our study underscores the magnetism and magnetocaloric effect properties exhibited by heavy rare-earth RE 6 MoO 12 compounds family, positioning them as a potential magnetic refrigerant in the field of low-temperature magnetic refrigeration.
研究领域:
凝聚态物理
·
材料科学
·
低温物理学
·
磁学
·
功能材料
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lisha Zhang,Yudong Ji,Weidong Li,Bing Zhang,Qiang Ma,Bowen Qin,Yilei Zhang,Dan Yue,Zhenling Wang
Lanthanide ions-doped fluoride nanocrystals have excellent application prospect. However, low photoluminescence quantum yield (PLQY) is usually along with lanthanide ions-doped fluoride nanocrystals owing to their low molar absorptivity and narrow absorption band . In order to increase the absorption cross section of Ln 3+ in fluoride nanocrystals, a facile synthesis strategy to enhance luminescence of AF 2 : Ln 3+ (A = Ca, Sr; Ln = Eu, Tb) by the use of carbon dots (CDs) has been developed in this work. A series of characterizations including TEM , XRD , FTIR and XPS demonstrated that the CDs have been successfully combined with the surface of AF 2 : Ln 3+ nanocrystals. The combination of CDs has little influence on the microstructure and phase structure of AF 2 : Ln 3+ , and CDs@AF 2 : Ln 3+ nanocrystals have uniform and regular shape with cubic phase. CDs are used as a broadband sensitizer and lead to the broadband excitation of Ln 3+ , resulting in the enhancement around 10-fold of Ln 3+ luminescence emission in AF 2 : Ln 3+ nanocrystals after CDs combination. The corresponding PLQY increases almost three times, and the luminescence enhancement mechanism by combining CDs is proposed. In addition, the CDs@AF 2 : Ln 3+ nanocrystals are used to prepare CDs@AF 2 : Ln 3+ /PVA films, which exhibits excellent luminescence properties under the excitation of UV light . This work provides a superior method for enhancing the luminescence properties of lanthanide ions-doped nanocomposites and demonstrates practical potential as promising candidates for light-converting thin films .
研究领域:
材料科学
·
光学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Dong Zhang,Ping Yan,Hong Yu,Jing Sun,Shuyun Zhu,Xian-En Zhao
Development of accurate, convenient and portable methods for monitoring 4-aminophenol (4-AP) is extremely important because of its strong toxicity. Here, a ratiometric fluorescence sensor based on Ag + -enhanced luminescence of Tb-DNA complexes has been presented for the detection of 4-AP. The luminescence of Tb-DNA complexes is enhanced about 30 times by Ag + , which can trigger energy transfer from DNA to Tb 3+ more efficiently. In the presence of 4-AP, Ag + can be reduced into Ag 0 owing to its strong reducibility, inducing the decrease of Tb-DNA complexes at 545 nm remarkably. Besides, 4-AP exhibits intrinsic fluorescence at 375 nm under the same conditions. Therefore, ratiometric detection of 4-AP can be achieved using F 375 /F 545 as readout with a detection limit of 0.4 μM. Real water samples have been tsted to evaluate this method in practical application and satisfactory results have been obtained. Furthermore, the addition of 4-AP into Tb-DNA-Ag + system induces a visible color variation from green to bluish violet, enabling visual detection of 4-AP under the assistance of a smartphone.
研究领域:
分析化学
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环境科学
·
生物传感
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DOI
PubMed
高影响因子
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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高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Yuanyuan Duan,Yongli Yu,Limei Wang,Shuang Zhao
In this work, a facile method for the preparation of dual-emission lanthanide nanoparticles (NPs) was developed. Tb 3+ -doped LaF 3 NPs coated with 2,6-pyridinedicarboxylic acid (DPA) and Eu 3+ , namely LaF 3 :Tb@DPA-Eu NPs, could produce characteristic emissions of Tb 3+ and Eu 3+ under 272 nm excitation, which originated from the absorption of DPA. The LaF 3 :Tb@DPA-Eu NPs with tunable emission peaks and color could be synthesized by changing the concentration of Eu 3+ . Additionally, the obtained NPs were comprehensively characterized by various analytical methods. Transmission electron microscopy (TEM) images showed that the average size of the NPs was ~15 nm. Moreover, X-ray diffraction (XRD) analysis revealed that the products were single-phase LaF 3 , while the doped Tb 3+ entered the LaF 3 lattice to occupy the La 3+ sites. Owing to their excellent water solubility and good optical properties , the LaF 3 :Tb@DPA-Eu NPs were used as a fluorescence probe for the detection of marbofloxacin (MAR) based on the fluorescence quench. Notably, an effective ratiometric fluorescence method was established. The approach exhibited good sensitivity and selectivity with a linear range of 0.10 ~ 10.0 μM and detection limit of 85 nM. It was successfully employed for the determination of MAR in milk samples with recoveries of 98.1%–106%. Thus, the fluorescence method based on the LaF 3 :Tb@DPA-Eu NPs developed herein provides a convenient and fast platform for the detection of MAR.
研究领域:
分析化学
·
材料科学
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DOI
高影响因子
Nanoscale
·
2012
·Vol. 4
·期 18
·5619-5626
·
IF 5.914
Suwen Li,Xiao Zhang,Zhiyao Hou,Ziyong Cheng,Pingan Ma,Jun Lin
Uniform, ultra-small-sized and well-water-dispersible LaF3 nanoparticles doped with trivalent rare earth (RE) ions (Eu3+ or Tb3+) have been synthesized by a simple, low temperature synthesis route. The nanoparticles, with sizes of about 3.2 nm (for those doped with Eu3+) and 3.0 nm (for those doped with Tb3+), are roughly spherical and monodisperse. 1,2,4,5-Benzenetetracarboxylic acid (labeled as BA) as sensitizer has been bonded to the surface of the nanoparticles, which can sensitize the emission of RE3+ in the LaF3 nanoparticles. The BA–LaF3:RE3+ (RE = Eu or Tb) nanoparticles have a broad absorption band in the UV domain, and show enhanced luminescence of RE3+ based on an energy transfer from BA ligands to RE3+ ions (i.e. the so-called “antenna effect”). Due to the dual protection of organic ligands (BA) and inorganic matrices (LaF3), BA–LaF3:RE3+ (RE = Eu or Tb) nanoparticles have longer excited state lifetimes than LaF3:RE3+ (RE = Eu or Tb) nanoparticles as well as lanthanide coordination polymers of BA.
研究领域:
材料科学
·
光学
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PubMed
高影响因子
HIGH PERFORMANCE POLYMERS
·
2022
·
IF 1.73
Wanli Tang,Pengcheng Li,Dawei Yan,Yonggang Yan,Haohao Ren,Bo Wang,Jingxian Zhao
In this study, a novel poly(phenylene sulfide)-grafted metal-organic framework (Tb–MOF–PPS) was fabricated. Initially, 2,5-dichloroterephthalic acid and TbCl3·6H2O were used as raw materials to synthesize the dihalogenated MOF (Tb–MOF) through ultrasound irradiation and hydrothermal methods. Subsequently, Tb–MOF was added at different mole proportions (2.5, 5, 7.5, and 10%) for the copolymerization of PPS, and a serial of Tb–MOF–PPS composites were successfully obtained. Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy proved that the Tb–MOF was covalently connected to PPS. The introduction of the Tb–MOF had no evident influence on the thermal properties of the composites. Additionally, the fluorescence characteristics revealed that the fluorescence excitation and emission spectra of the composites had a large redshift compared with that of PPS and possessed visible-light photoluminescence properties. These results indicate that the composites obtained can be used as optical sensors.
研究领域:
材料科学
·
光学
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高影响因子
POLYHEDRON
·
2023
·
IF 2.6
Chang-Qing Miao,Jie-Chen Yan,Chen Yang,Jia-Li Wang,Jia-Le Ding,Si-Rong Chen,Juan-Xiu Ge,Ni Wang,Yin-Ling Hou
Two new and interesting tetranuclear Tb(III)-based clusters [Tb 4 (NO 3 ) 2 (acac) 4 (HL) 2 (CH 3 OH) 2 ]·2(CH 3 CN)] ( 1 ) and [Tb 4 (NO 3 ) 2 (acac) 4 (L) 2 (CH 3 CH 2 OH) 2 ] ( 2 ) (H 4 L1 = 2-(hydroxymethyl)-2-(((2-hydroxynaphthalen-1-yl)methylene)amino)propane-1,3-diol); H 3 L2 = 2-(((2-hydroxynaphthalen-1-yl)methylene)amino)-2-methylpropane-1,3-diol; and Hacac = acetylacetone) have been successfully synthesized by using two polydentate Schiff base ligands (H 3 L2 and H 4 L1). The crystal structures, fluorescent properties, magnetic properties and catalytic properties of the two clusters 1 and 2 have been systematically studied. Interestingly, both clusters 1 and 2 can catalyze the cycloaddition of CO 2 with epoxides with high efficiency under mild conditions; and cluster 1 as a catalyst could be reused at least three times without obvious loss of catalytic performance.
研究领域:
无机化学
·
材料科学
·
催化化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Suyue Liu,Jingjing Tian,Longjiao Zhu,Hongtao Tian,Min Yang,Kunlun Huang,Wentao Xu
To develop a fast, isothermal, enzyme-free and visible method for the on-site detection of silver ions (Ag + ), a ratiometric Ag + sensor was constructed based on a dual-emission ternary nucleotide terbium probe, fabricated by synthesizing the luminescent nanomaterial Luminol-GMP-Tb (LGT). We repositioned the fluorescent properties of the nanomaterial from the perspective of the inherent optical properties of two signal reporters (luminol and Tb 3+ ) through highlighting the absorption, fluorescence steady-state measurement and time-resolved properties. Furthermore, based on the ingenious coordination interaction and energy transfer among Ag + , luminol and GMP-Tb, we hypothesized and confirmed that Ag + induced morphology and luminescence changes of LGT through scanning electron microscopy and lifetime changes as well as fluorescence changes. Meanwhile, by means of a portable ultraviolet detector with dual wavelengths, based on the fluorescence excitation characteristics of each component, different photoluminescence color phenomena presented at different excitation wavelengths. Therefore, visual qualitative detection could be realized under a portable UV lamp with 254 nm for mainly visible green color change while 365 nm as built-in reference for blue-emitting luminol. The ratio calculation method and the enhanced luminescence ratio mechanism made LGT exhibited extremely high selectivity to Ag + . Quantitative detection Ag + was realized in two ranges of 0.1 μM ~ 6 μM and 6 μM ~ 100 μM with a minimum detection limit of 65 nM. The method has been successfully exploited in real water samples with recovery rate between 99.7% and 106.38%, showing broad application prospects in food safety and environmental monitoring for the on-site detection of Ag + .
研究领域:
分析化学
·
环境科学
·
食品安全
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Minqiao Feng,Chengyan Yin,Hailiang Qin,Wei Liu,Yunqi Wang,Ruth Antwi-Baah,Yao Rao,Shuxia Xu
Terminal deoxynucleotidyl transferase (TdT) is actively expressed in leukemia patients and plays an important role in maintaining the genetic diversity of an organism. Therefore, developing simple and sensitive analytical methods for the accurate detection of TdT in serum is of significant importance. Herein, an electrochemical biosensor based on a toluidine blue (TB)-loading mesoporous silica nanoparticles (MSN) was established for the detection of TdT in serum. First, MSN with amino group was synthesized and subsequently was carbonylated to obtain carboxyl-functionalized MSN (MSN-COOH), which was used to load TB. Thereafter, MSN-COOH was sealed with the substrate strand S(rA)-NH 2 of the Mg 2+ -dependent DNAzyme to form S(rA)-NH 2 /TB/MSN-COOH. In the presence of TdT, it can add deoxyadenosine triphosphate (dATP) to the 3’-OH end of Enc-5 A, activating its cleavage activity on the substrate chain S(rA)-NH 2 , thus releasing TB encapsulated in MSN-COOH. By measuring the change in the electrochemical signal of TB, the TdT concentration can be determined. The linear range is from 5 to 400 U/mL and the limit of detection (LOD) is 0.369 U/mL (3 σ/K). Since DNAzyme can be extended by TdT without the need of a template, the proposed biosensor demonstrates excellent selectivity towards TdT in the presence of other DNAzyme, such as T4 DNA ligase, phi29 DNA polymerase, DreamTaq DNA polymerase, and Klenow fragment ( exo -). Furthermore, the proposed biosensor was successfully applied to the detection of TdT in serum with the recovery rates ranged from 91.0 % to 94.7 %, indicating its potential for early detection of leukemia and other related diseases.
研究领域:
生物分析化学
·
生物传感器
·
分子诊断
·
纳米生物技术
·
肿瘤学
·
临床化学
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DOI
高影响因子
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