JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 4
·3144-3155
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IF 2.993
Qu Fei,Li Xiaonan,Lv Xiaoxia,You Jinmao,Han Wenli
Photoinduced electron transfer (PET) has been used as reporter in the field of photoluminescence sensors and switches, and intermolecular PET is believed to be responsible for fluorescence quenching. Herein, the emissions of Tb-MOF can be quenched effectively by protamine based on PET. Compared with conventional electrostatic attraction mechanism, this approach suffers less interference from other charged substances and has a broader linear range of protamine from 3 to 5000 ng/mL with limit of detection (LOD) 1.21 ng/mL. Subsequently, the strong binding effect of protamine toward Hep ascribed to electrostatic attraction hinders the interaction between Tb-MOF and protamine, resulting in the high emissions of framework. The detection of Hep also shows a good linear range from 0.5 to 5 μM with LOD 0.27 μM. Finally, this novel probe is also successfully applied to the determination of protamine and Hep in human serum with satisfactory results.
研究领域:
分析化学
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材料科学
·
生物传感器
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DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Ting Wang,Lei Zhang,Jieyuan Zhang,Gaoxian Guo,Xinhui Jiang,Zhengwei Zhang,Siqiao Li
Carbendazim (CBZ), a well-known benzimidazole pesticide, is utilized in agriculture to prevent and cure plant diseases caused by fungi. Residual CBZ in food poses serious threat to human health. Herein, a fluorescent two-dimensional terbium-based metal–organic framework (2D Tb-MOF) nanosheet sensor was developed for the rapid and ultrasensitive detection of CBZ. The 2D Tb-MOF nanosheets, prepared with Tb 3+ ions and 5-borono-1,3-benzenedicarboxylic acid (BBDC) as the precursors, exhibited excellent optical properties. Upon the addition of CBZ, the fluorescence of Tb-MOF nanosheets was quenched because of the inner filter effect (IFE) and dynamic quenching. The fluorescence sensor offered two linear ranges of 0.06–4 and 4–40 µg/mL with a low detection limit of 17.95 ng/mL. Furthermore, the proposed sensing platform was successfully applied to assay CBZ in apples and tea, and satisfactory results were obtained. This study provides an effective alternative strategy for the qualitative and quantitative determination of CBZ to ensure food safety.
研究领域:
农业化学
·
分析化学
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食品科学
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DOI
PubMed
高影响因子
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.
研究领域:
材料科学
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分析化学
·
食品安全
·
传感器与生物传感器
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jiajia Yuan,Yue Luo,Xinfeng Zhang
In this study, we developed a sensitive chemiluminescence (CL) method for the detection of Cr (Ⅲ) and Cr (VI), based on periodate (NaIO 4 )-hydrogen peroxide (H 2 O 2 )-terbium-based metal–organic frameworks (Tb-BTC MOF) system. Reactive oxygen species (ROSs) created from the reaction of NaIO 4 with H 2 O 2 , such as singlet oxygen ( 1 O 2 ), can effectively transfer energy to the Tb-BTC MOF, resulting in the characteristic emissions from Tb 3+ through the antenna effect. Compared to its bulk form, the nanoscale Tb-BTC MOF exhibited significantly enhanced CL intensity, which can be attributed to improved surface properties and reduced non-radiative decay. The presence of Cr (VI) led to a marked decrease in CL intensity due to energy competition with the H 3 BTC ligand. Additionally, Cr (III) was oxidized to Cr (VI) by NaIO 4 , thereby indirectly contributing to CL quenching. A linear correlation was observed between the concentrations of Cr (III)/Cr (VI) and the reduction in CL intensity, enabling quantitative analysis of both species. Following systematic optimization, the proposed method demonstrated good sensitivity, achieving detection limits of 33 nM for Cr (III) and 17 nM for Cr (VI), which are significantly lower than those obtained with fluorescence-based detection using Tb-BTC MOF. Furthermore, by employing a cation-exchange resin for pre-separation, Cr (III) and Cr (VI) could be individually quantified within mixed samples. This method was also successfully applied to real water samples, yielding satisfactory recoveries and demonstrating its practical applicability for chromium speciation analysis in environmental matrices. Overall, this work provides new insights into the design of advanced CL systems using nanostructured MOFs, offering a promising strategy for the selective and sensitive detection of metal ions in complex environmental matrices.
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高影响因子
LUMINESCENCE
·
2022
·Vol. 37
·期 10
·1793-1799
·
IF 2.613
Piaotong Liu,Rusi Hao,Wenliang Sun,Ziyi Lin,Tianfeng Jing
The increasing degradation of ecosystems due to heavy metal residues has led to environment and food contamination, prompting the development of convenient platforms for monitoring heavy metals. Here, a new dual-emission fluorescent sensor CuNCs@Tb@UiO-66-(COOH) 2 for the detection of copper ions (Cu 2+ ) has been synthesized using one-pot encapsulation of Tb(III) and glutathione-stabilized copper nanoclusters (CuNCs) into metal–organic frameworks (MOFs) UiO-66-(COOH) 2 . In this ratiometric sensor, the fluorescence intensity of Tb 3+ decreased significantly upon the addition of Cu 2+ , whereas that of CuNCs showed good stability, together with an apparent colour change. Therefore, ratiometric fluorescence detection of Cu 2+ can be accomplished by measuring the ratio of the fluorescence intensity at the 450 nm (F 450 ) wavelength of CuNCs to the 548 nm (F 548 ) emission of Tb 3+ in the fluorescence spectra of the CuNCs@Tb@UiO-66-(COOH) 2 suspension. Moreover, the obtained fluorescent probe showed good results in the detection of actual samples. This work can provide the basis of method for the exploration of ratiometric fluorescence and visual sensors of trace pollutants analysis in complicated samples.
研究领域:
环境科学
·
分析化学
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材料科学
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DOI
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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DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Hui Cao,Lin Chen,Zixia Huang,Xiner Ding,Yiyuan Liu,Jinsong Yu,Fei Xu
Lanthanide-based metal–organic frameworks (Ln-MOFs) have received wide attention as luminescent sensors due to their outstanding porosity and optical properties. However, the poor selectivity and instability of Ln-MOFs in a water environment limit their application in a complex sample matrix. To address this issue, a luminescent Tb–H4btc-Asp@IIP was developed through amino acid functionalization via a coordinative postsynthetic method (CPSM) combined with surface imprinting strategies. The synthesized Tb–H4btc-Asp@IIP retained 90.2% of its original fluorescence intensity after 30 days in aqueous environments and exhibited high thermal stability up to 286 °C. This improved stability was primarily attributed to a protective ion-imprinted polymer (IIP) layer measuring 90 nm in thickness. Additionally, Tb–H4btc-Asp@IIP exhibited excellent selectivity for Pb(II), benefiting from the dual recognition capabilities of the Asp functional groups and the imprinted cavity for Pb(II). The Tb–H4btc-Asp@IIP sensor effectively detected Pb(II) concentrations ranging from 5 to 300 ng/mL, achieving a low detection limit of 3.19 ng/mL. In vegetable samples, the sensor was able to quickly detect Pb(II) levels, with the average recovery ranging from 82.4 to 109.2% and RSD values of 2.0%–4.8%. The photoinduced electron-transfer (PET) effect and dynamic quenching process contributed to the sensing process of Tb–H4btc-Asp@IIP.
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PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2021
·Vol. 413
·期 16
·4227-4236
·
IF 4.157
Chen Li,Liu Donghao,Zheng Limin,Yi Simin,He Hua
In the present work, a structure-dependent ratiometric fluorescence (RF) sensor constructed with boric acid–modified carbon quantum dots (B-CQDs) and Tb-MOF(MOF-76) was developed for sensing 2,6-pyridinedicarboxylic acid (DPA). Based on the distinct fluorescent responses of B-CQDs and MOF-76 to DPA, MOF-76/B-CQDs can be developed as a RF sensor for DPA detection. In this RF sensor, the reticulated cross-linked structure of MOF-76/B-CQDs can be destroyed by DPA due to a strong coordination effect between DPA and the Tb of MOF-76, resulting in the quenching of the fluorescence of B-CQD and the restoration of the fluorescence of MOF-76 after the addition of DPA. Benefiting from the confinement effect of the special structure change, the presented sensor showed high sensitivity toward DPA with a detection limit of 3.05 μM and excellent selectivity over the monochromatic fluorescence sensor. Graphical abstract
研究领域:
分析化学
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材料科学
·
传感器
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Zhi Wang,Dongquan Leng,Yan Zhang,Tingting Wu,Hongmin Ma,Xiang Ren,Zhen Yu,Qin Wei
Aflatoxin B1 (AFB1) poses severe threats to human health even at trace levels, necessitating the development of rapid and sensitive detection methods. This work presents an innovative self-powered photoelectrochemical aptasensor for ultrasensitive AFB1 monitoring. Specifically, zinc phthalocyanine-sensitized MgIn 2 S 4 as a high-performance photoanode, where the sensitization narrows bandgap and extends light absorption, generating enhanced photocurrent for biological detection. Furthermore, Au@CuGaO 2 as a stable photocathode that provides abundant biomolecule binding sites while circumventing the false-positive issues inherent in conventional anodic sensing platforms. Notably, SiO 2 @Tb-MOF as a dual-function quencher that simultaneously competes for visible light excitation and creates steric hindrance to block electron donor access, achieving significant signal amplification. The synergistic effects of these components yield exceptional analytical performance, including an ultra-wide linear range (0.01 pg/mL to 100 ng/mL) and a low detection limit (0.0032 pg/mL). The satisfactory anti-interference, reproducibility and stability provide a solid foundation for the application of this sensing platform.
研究领域:
分析化学
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环境监测
·
食品安全
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生物传感器与生物电子学
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材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 52
·期 3
·644-651
·
IF 4.569
Xiao Lian,Lele Cheng,Jingrui Shan,Mingzai Wu,Fangcai Zheng,Helin Niu
The identification of drugs or biomolecules for public health monitoring requires facile analytical technologies with excellent sensitivity, portability and reliability. In the past decades, different sensing materials have inspired the development of various bioanalytical strategies. However, sensing platforms based on powder materials are not suitable for medical diagnosis, which limits further exploration and application of biosensors. Herein, a point-of-care testing (POCT) membrane was designed from an energy competition mechanism and achieved the detection of the nonsteroidal antiphlogistic diclofenac, and exhibited remarkable testing efficacy at the ppb level. The mixed matrix membrane (MMM) sensor consists of electrospun polyacrylonitrile nanofibers and luminescent Tb-MOFs and possess the advantages of high stability, outstanding anti-interference ability, efficient detection (LOD = 98.5 ppb) and easy visual recognition. Furthermore, this MMM sensor exhibits excellent recyclability in serum, which is beneficial for developing a portable and convenient device to distinguish diclofenac in practical sensing applications. Meanwhile, the feasibility and mechanism of this recyclable sensor were verified by theory and experiments, indicating that it is a promising device for diclofenac detection in biological environments to evaluate the toxic effect caused by the accumulation of nonsteroidal drugs.
研究领域:
分析化学
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材料科学
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生物医学工程
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环境健康
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 17
·8029-8036
·
IF 3.925
Qingju Liu,Saixue Tang,Hui Wang,Ping Han
The current luminescent metal–organic framework (MOF) based fluorescence detection mostly focuses on achiral molecules. The stereospecific recognition and determination of MOF-based detection remain challenging. A novel luminescent terbium-based MOF (Tb-MOF) based biosensing system with excellent performance for stereoselective detection of D-amino acids (D-AAs) was introduced in this paper. D-Amino acid oxidase catalyzes stereospecific oxidative deamination of D-AAs, producing H2O2. The generated H2O2 effectively quenches the fluorescence of Tb-MOF. Under optimum conditions, the D-AAs were detected with excellent efficiency. The linear working range was 0.5–100 μM for D-Alanine (D-Ala) and 0. 5–5 μM for D-Proline (D-Pro), respectively. The limit of detection (Ksv detection) for D-Ala and D-Pro was 0.09 μM and 0.14 μM, respectively. The detection can be performed within 30 min with high selectivity and long-term stability. The fluorescent sensing platform required simple fabrication and operation and was free from complicated reaction processes and expensive reagents. The present sensing system was successfully applied in D-AA detection in human serum with good recovery, indicating its potential application in detection in biological samples.
研究领域:
分析化学
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生物技术
·
材料科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Jingxian Zhu,Bo Jing,Yiman Jia,Weiwei Zhang,Changyan Sun
Developing sensitive and biocompatible detection technologies is important for public health management and risk assessment. In this investigation, a new multifunctional Tb-MOF fluorescent nanomaterial was constructed, which has excellent structural stability and luminescent performance. It can achieve highly sensitive detection of three key target substances - aspartic acid, ethyl maltol, and rotenone in complex matrices, with detection limits as low as 16.0, 14.5, and 48.0 nM respectively. The Tb-MOF exhibited successful application in real samples such as infant formula, peanut oil, and artificial serum with satisfactory recovery rates (92.49%–103.1%). It is worth noting that the cytotoxicity experiment further confirmed its low toxicity, supporting its safe application in the biological body.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）