CARBOHYDRATE POLYMERS
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2026
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IF 12.5
Yuting Zhang,Xinmiao Qi,Binzhen Liu,Liangkun Li,Xin Guo
Orange peel is an abundant polysaccharide-rich agro-industrial residue that is often discarded, causing resource loss and environmental burden. Here, we valorize orange peel-derived pectin into a mechanically robust and photostable fluorescent hydrogel (EuCPH) by embedding uniformly dispersed Europium-based metal-organic framework decorated cellulose nanofibril (Eu-MOF@CNF). The resulting red-emissive EuCPH enables simultaneous levofloxacin (LEV) capture and fluorescence sensing. EuCPH-4 exhibits an ultrahigh Langmuir capacity of 1388.6 mg g −1 and a low limit of detection (LOD) of 0.12 μg L −1 . Adsorption follows the Langmuir isotherm and pseudo-second-order kinetics, consistent with chemisorption-dominated uptake. EuCPH-4 retains 83.8% of its capacity after five cycles with negligible Eu leaching (<8 ppb) and sustains stable performance over ten fixed-bed regeneration cycles. With low-cost orange peel-derived pectin and wood-derived CNF, EuCPH can be produced at ~0.02 CNY g −1 , providing a scalable and economically viable hydrogel platform for antibiotic monitoring and remediation.
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高影响因子
BIOSENSORS & BIOELECTRONICS
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2019
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IF 9.518
Yu Cui,Fei Chen,Xue-Bo Yin
A Eu-metal organic framework (Eu-MOF) probe with dual-emission was reported for the ratiometric fluorescence detection of H 2 O 2 and glucose. Because of the special nucleophilic reaction between boric group and H 2 O 2 , Eu 3+ and 5-boronobenzene-1,3-dicarboxylic acid (BBDC) were selected to synthesize the functional MOF probe via a simple one-pot solvothermal method . The Eu-MOF shows dual-emission at 370 and 623 nm with the single excitation at 270 nm due to the energy transfer efficiency change for antenna effect procedure. After addition of H 2 O 2 , the red emission of Eu-MOF weakened and the blue emission enhances immediately under 270 nm irradiation, so the ratiometric fluorescence detection is established. Moreover, the obvious color change for visual measuring of H 2 O 2 and glucose is illustrated to reveal the merit of Eu-MOF probe. The proposed method was demonstrated to be highly sensitive and selective for H 2 O 2 and glucose, with the low detection limits of 0.0335 and 0.0643 μM, respectively. The established boric-acid-functional Eu-MOF sensing platform was proved as the powerful probe for H 2 O 2 and the metabolites involved in H 2 O 2 -generating reaction.
研究领域:
分析化学
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材料科学
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生物化学
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高影响因子
MICROCHIMICA ACTA
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2026
·Vol. 193
·期 9
·628
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IF 5.4
Li Fuping,Li Baoyu,Li Rong,Men Xue,Gao Lian-Xun,Wu Chengxin,Yang Wenrong,Pang Pengfei,Zhang Yanli
A fluorescent switch nanoprobe based on boric acid-functionalized europium-based metal–organic framework (BA-Eu-MOF) integrated with a visual analysis platform assisted by smartphone was established for the sensitive detection of Hg 2+ and glutathione (GSH). The probe was fabricated with 5-boronoisophthalic acid as ligand and europium ions as metal node, which enables specific recognition of Hg 2+ through a transmetalation mechanism. Upon the introduction of Hg 2+ , the red fluorescence of the probe was quenched (“off” state). When GSH is added, because its thiol groups have a stronger binding affinity for Hg 2+ , it competitively extracts Hg 2+ from the BA-Eu-MOF/Hg 2+ complex, leading to fluorescence recovery (“on” state). Based on this “on-off-on” mode, the quantitative detection of Hg 2+ and GSH was achieved with detection limits of 0.67 nM and 0.087 µM. Furthermore, the intelligent sensing platform for quantitative detection of analytes was developed by utilizing a smartphone Color Grab App with detection limits of 9.57 µM and 2.32 µM, respectively. Both modes were successfully employed to the detection of Hg 2+ and GSH in actual samples with spiked recoveries ranging from 88.9% to 108.0%. Benefiting from the porous characteristics of MOF and the specific recognition capability of the boric acid group, the proposed probe exhibits notable advantages including facile preparation, operational simplicity, high sensitivity, and excellent selectivity. This study provides a facile, reliable and field-applicable novel detection strategy for environmental monitoring and the investigation of interactions between heavy metals and biomolecules. Graphical
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高影响因子
OPTICS AND LASER TECHNOLOGY
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2026
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IF 5.2
Kaicheng Zhou,Zhongli Wu,Xiaomin Jian,Heng Xu,Xingjun Li,Xinchi Duan,Yingchun Luo
Constructing dual-ligand Eu-MOF fluorescent probes to improve the characteristic luminescence of Eu 3+ . • Developing an Eu-MOF aerogel system with selective recognition, sensitive detection, and flexible features. • Investigating the fluorescence quenching mechanism of Eu-MOF. • Achieving a Cu 2+ detection limit of 0.775 × 10 −6 M with potential applicability in real polluted water samples. Given the hazards of metal ions and the difficulties in recycling and agglomeration of rare earth metal–organic framework (MOFs) powders, this study constructs a flexible aerogel fluorescence sensing platform based on dual-ligand Eu-MOF for highly sensitive detection of Cu 2+ . Eu-MOF exhibits outstanding fluorescence sensing performance by virtue of sharp emission bands, large Stokes shift and excellent photostability, combined with coordination environment modulation via dual ligands. Immobilizing such MOF into a 3D aerogel network can effectively overcome the drawbacks of poor processability, easy agglomeration and difficult recovery of MOF powders while preserving their intrinsic luminescence properties. The results show that Eu-MOF can be uniformly loaded onto the pore wall surface of PVA/k-CG/SA aerogel without significantly affecting its original luminescence properties. The obtained PVA/k-CG/SA/Eu-MOF aerogel exhibited a well-developed porous architecture and good mechanical robustness, after 10 cycles of compression at 60 % strain, the maximum compressive stress still reaches 12.08 kPa. Furthermore, the material exhibits the highest luminescence intensity when the mass ratio of Eu-MOF to DPA is 1:2, further increasing the Eu-MOF content leads to fluorescence attenuation due to concentration quenching effects dominated by electric dipole-electric dipole interactions. Under optimized detection conditions, this aerogel demonstrates a significant and excellent selective fluorescence quenching response to Cu 2+ , with a detection limit as low as 0.775 × 10 −6 M. This study provides a feasible strategy for constructing flexible, recyclable, and processable rare-earth MOFs macroscopic fluorescent sensing materials and demonstrates their application potential in environmental monitoring.
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高影响因子
FOOD CHEMISTRY
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2026
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IF 10.4
Mingsha Jie,Amei Zhu,Zhendong Liu,Junguang Li,Zeyu Xu,Xiaoyue Yue,Yanhong Bai
γ-CD-MOF@Eu-MOF flower-like probe synthesized for sensitive sulfonamides detection. • Paper-based sensor enables portable, visual on-site testing via smartphone imaging. • Machine learning algorithm boosts detection speed and reliability for quantitation. • The detection limit of the γ-CD-MOF@Eu-MOF for SAs is as low as 25.5 nmol/L. The protection of human health and the guarantee of food safety necessitate rapid and precise identification of sulfonamides (SAs) residues in food. Herein, we propose a fluorescence sensor based on γ-CD-MOF@Eu-MOF, which is used for quantitative and visual detection of SAs. The γ-CD-MOF@Eu-MOF exhibits high selectivity toward SAs, with detection limits for sulfamerazine (SMR), sulfamethazine (SM 2 ), and sulfamethoxydiazine (SMD) as low as 25.5 nmol/L, 36.7 nmol/L, and 39.8 nmol/L, respectively. The fluorescent probes were immobilized on paper substrates to construct a paper-based sensor, which was combined with a smartphone-assisted machine learning algorithm to enable high-throughput, intelligent, and rapid detection of SAs. After optimizing the constructed prediction model, the coefficient of determination can reach 0.99, indicating the accuracy and applicability of the model. Overall, this sensor exhibits excellent stability, sensitivity, and specificity, providing a practical approach for the intelligent, rapid, and high-throughput on-site visual detection of SAs. Download: Download high-res image (163KB) Download: Download full-size image
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高影响因子
BIOELECTROCHEMISTRY
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2025
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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.
研究领域:
分析化学
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环境科学
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生物传感技术
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高影响因子
Analytical Methods
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2025
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IF 2.6
Nanhai Zhang,Deyan Liu,Rui Zhang,Qinghe Song,Guangjun He,Shixing Wang,Libo Zhang
The design and preparation of fluorescent sensors for detecting toxic ions in aqueous environments are of paramount importance. In this study, a europium metal–organic framework (Eu-MOF), constructed from Eu3+, the rigid 2,2′-biphenyldicarboxylic acid (2,2′-H2bpdc) ligand, and the auxiliary 1,10-phenanthroline (Phen) ligand, was synthesized through hydrothermal synthesis. The synthesized Eu-MOF demonstrated remarkable water stability, pH stability, thermal stability, and photostability. It showed a high quantum yield of 42.6%, along with an average fluorescence lifetime of 0.9002 ms, which could enhance its sensitivity when employed as a fluorescent probe. The Eu-MOF could function as a fluorescent probe to quantitatively detect trace amounts of Fe3+, CrO42− and Cr2O72− via fluorescence quenching. Their detection sensitivities are 1.527 × 104 M−1, 1.378 × 104 M−1 and 1.463 × 104 M−1 respectively, with detection limits as low as 0.28 μM, 0.19 μM and 0.09 μM. Additionally, the Eu-MOF sensor exhibited excellent selectivity, anti-interference ability, repeatability (after undergoing five cycles) and practical feasibility. Furthermore, a detailed investigation of its fluorescence properties and sensing mechanisms was carried out. Based on density functional theory calculations, two energy transfer pathways in the process of Eu3+ ion luminescence sensitized by the double ligands 2,2′-H2bpdc and Phen were identified. The fluorescence sensing mechanism of the Eu-MOF for detecting Fe3+, CrO42− and Cr2O72− involved photoinduced electron transfer from the antenna ligand to the organic molecules and competitive absorption of excitation energy. Owing to its high stability and sensitivity, the Eu-MOF holds great potential for practical applications as a sensor for Fe3+, CrO42− and Cr2O72− in aqueous environments.
研究领域:
分析化学
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环境监测
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材料科学
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荧光探针
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无机化学
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传感器技术
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高影响因子
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
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食品安全
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高影响因子
Materials Today Physics
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2024
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IF 10
Jingru Wang,Jiaxin Yang,Yanyan Li,Yang Li,Rui Xu,Feng Song
The widespread application of optical encryption materials with difficult imitation, multicolor-tunable emission and simple operation presents a promising strategy for secure communication and authentication of information. Herein, Eu-MOF grafted with coumarin 7 is successfully constructed through self-assembly process and a prismatic three-dimensional hyperbranched structure is formed. At room temperature, it can be excited to by ultraviolet light significantly different green and red light emission. With the temperature rising to 363 K, under the excitation of 360 nm, a continuous and programmable color transformation occurs, resulting in a fitted line with a fitting degree of 0.99745. In order to maintain robust reliability, regular alterations in accordance with temperature variations are assessed through temperature sensitivity, and the absolute sensitivity and relative sensitivity can reach up to 6.168 % K −1 and 4.387 % K −1 . Based on the abundant emission modes, we develop an asymmetric information security authentication program to simulate encrypted information communication, which provides reliable guidance on visualized information storage and encryption.
研究领域:
光学材料
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密码学
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材料科学
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化学
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信息安全
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高影响因子
危险品化学品经营许可证（带存储）