MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Xiangzhi Meng,Donghan Wang,Fei Shen,Baitong Chen,Ziwen Lin,Juan Hou
Mercury ion (Hg 2+ ) contamination poses a serious threat to the environment and human health, highlighting the need for sensitive and sustainable detection strategies. Herein, we proposed an eco-friendly and low-cost fluorescent detection platform for Hg 2+ using N-doped carbon dots (N-CDs) synthesized from Artemisia argyi-derived cellulose extracted via deep eutectic solvent (DES) technology. The N-CDs showed strong fluorescence quenching toward Hg 2+ , achieving a low detection limit of 1 nM with a wide linear range of 0.05 to 20 μM. Detailed investigation confirmed that the quenching behavior mainly originated from the specific interactions between Hg 2+ and surface functional groups of N-CDs. To enable on-site and real-time applications, a smartphone-based fluorescence sensing system was developed. The quantitative signal was extracted using the (G + B)/G parameter, where G and B represent the green and blue intensity components obtained from Red-Green-Blue images under UV illumination. A clear linear correlation was observed between Hg 2+ concentration and the (G + B)/G response. The method was successfully applied for Hg 2+ detection in real water samples, confirming its practicality. Overall, this green and effective sensing approach offers significant potential for water quality assessment and environmental monitoring.
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INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2023
·
IF 2.6
Xianjiao Meng,Zhichun Li,Wenbing Ma
In this study, we have successfully synthesised a novel fluorescent chemosensor TM using rhodamine as the fluorophore and 8-hydroxyquinoline as recognition group through traditional Schiff base preparation methods. The chemical structure of sensor TM was characterised by 1H NMR, 13C NMR and ESI-MS. Sensor TM showed obvious fluorescence enhancement response to Hg2+ ion. The detection limit was 0.05 μM, and the solution colour changed from colourless to pink, making it a promising probe for effective naked-eye detection of Hg2+. The results of Job curve indicated that sensor TM and Hg2+ ion coordinated with each other with a binding stoichiometry of 1:1, and the pH test results showed that sensor TM was only suitable for acidic and neutral conditions.
研究领域:
分析化学
·
环境科学
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 14
·6916-6923
·
IF 3.3
Yanru Huang,Ying Li,Yang Li,Keli Zhong,Lijun Tang
Mercury ion (Hg2+) contamination is very hazardous and harmful to the natural environment and human health. The development of small molecule fluorescent probes for the rapid detection of Hg2+ is of great significance. In the present work, an “AIE + ESIPT” mechanism-based benzothiazole derived fluorescent probe was applied to Hg2+ detection and displayed excellent selectivity, good anti-interference ability, low detection limit (2.85 × 10−9 M), and a large Stokes shift (170 nm) in the DMF/H2O mixture solution with fw = 60% H2O volume fraction. The fluorescence response mechanism, involving the desulfurization reaction of O-(2-(benzo[d]thiazol-2-yl)-6-formyl-4-methylphenyl)dimethylcarbamothioate (probe L) with Hg2+ to release the “AIE + ESIPT” fluorophore, was well established based on the UV-vis, 1H NMR, and HRMS spectral analyses. The practical application evaluation indicates that probe L could be used to precisely determine Hg2+ in live cell imaging, natural water, and seafood samples.
研究领域:
分析化学
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环境科学
·
生物医学
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LUMINESCENCE
·
2021
·Vol. 37
·期 2
·220-229
·
IF 2.464
Yalei Liu,Luyao Su,Sui Wang,Zhiyong Guo,Yufang Hu
In this paper, based on the fluorescence of carbon quantum dots (CQDs) quenched by mercury ions (Hg 2+ ) and the nonresponse of Hg 2+ to rhodamine B fluorescence, a dual emission ratio fluorescence sensor was constructed to realize the quantitative detection of Hg 2+ . Under excitation at 365 nm, the fluorescence spectrum showed double emission peaks at 437 nm and 590 nm, corresponding to the fluorescence emissions of CQDs and rhodamine B, respectively. This method quantitatively detected Hg 2+ based on the linear relationship between the ratio of the intensities of the two emission peaks F 437 /F 590 and the concentration of Hg 2+ . The detection range was 10–70 nM, and the limit of detection (S/N = 3) was 3.3 nM. In addition, this method could also realize the qualitative and semiquantitative detection of Hg 2+ according to the fluorescence colour change of the probe under ultraviolet light. After various evaluations, the method could be successfully applied to the quantitative and visual detection of Hg 2+ in tap water, and demonstrated excellent selectivity, anti-interference performance, and repeatability of the method.
研究领域:
分析化学
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环境科学
·
材料科学
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yu-Zhen Wang,Xiao-Yue Kang,Ning-Na Shi,Mao-Zhong Tian,Qi-Liang Pan,Yun-Feng Bai,Langxing Chen
A Fe-MOFs/rGO/Au ternary composite to construct a competitive electrochemical immunosensor for Hg 2+ . • The porous conductive hybrid accelerates mass transfer and provides abundant antibody binding sites. • The established immunosensor exhibits two linear range of 0.05–200 and 250–2500 nM of Hg 2+ . • The established immunosensor displays the specific selectivity and a low LOD of 0.075 nM. • The sensing platform shows the promising potential for environmental heavy metal monitoring. The development of ultrasensitive Hg 2+ detection in water environments is crucial owing to its severe toxicity to ecosystems and human health. In this work, a label-free competitive electrochemical immunosensor was fabricated for the detection of mercury ions (Hg 2+ ) based on a ternary iron-based metal organic framework/reduced graphene oxide/gold nanoparticles (Fe-MOFs/rGO/AuNPs) nanocomposite. The Fe-MOFs/rGO hybrid composite was synthesized via a hydrothermal strategy, which significantly enhanced the conductivity and effective surface area of the electrode interface. Furthermore, L-cysteine-mediated AuNPs were covalently conjugated to the Fe-MOFs/rGO matrix, which not only offered a stable substrate for the immobilization of anti-Hg 2+ antibodies but also accelerated interfacial electron transport. By monitoring the current response through differential pulse voltammetry (DPV), the immunosensor exhibited the two linear ranges of 0.05–200 nM and 250–2500 nM toward Hg 2+ , accompanied by an ultralow detection limit (LOD) of 0.075 nM. Benefiting from the synergistic effect of the ternary nanocomposite as well as the outstanding specificity of antibody-antigen immunorecognition, the developed immunosensor meets the requirement for the safety monitoring Hg 2+ in complex environmental water samples. Download: Download high-res image (152KB) Download: Download full-size image
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Hao Wang,Hongyan Zhao,Guangqiang Liu,Cuixia Bi,Zhuo Zhang,Sujuan Feng,Shoubao Zhang,Shengjun Liu,Xiaolong Yin,Xiwen Zhang
A three-dimensional multi-pocket semi-funnel composite anodized aluminum template (AAO) substrate modified with silver nanoparticles (AgNPs@MPSF-AAO) was successfully constructed via two-step anodic oxidation, pore-expanding treatment, magnetron sputtering, and annealing. Using 4-aminophenylthiophenol (4-ATP) as the probe molecule, the substrate with the best SERS performance was prepared with 100-s sputtering followed by 3-h annealing, the detection limit was as low as 10 −14 mol/L, the logarithm of the concentration showed a good linear relationship with the Raman signal, and the enhancement factor was as high as 6.16 × 10 7 , with a relative standard deviation (RSD) of 7.3 %, showing excellent sensitivity and uniformity. The substrate achieved indirect detection of Hg 2+ through the specific reaction of Hg 2+ with the thiol group of 4-ATP, with low detection limit of 10 −9 mol/L. Moreover, the detection of pesticides (e.g., carbaryl and thiram) verified its practical application potential, offering an efficient solution for the rapid detection of trace harmful substances in industrial wastewater and environmental pollutants.
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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2013
·Vol. 51
·期 21
·4592-4600
·
IF 3.543
Yun Yu,Xinjian Cheng,Huijuan Zhang,Shengli Hu,Xianghong Li,Aiqing Zhang
Detection and the simultaneous removal of mercury ions are of vital importance. In this study, fluorescent monomers, small molecular sensors, were first synthesized using 4-bromo-naphthalic anhydride as precursor. These double bond bearing sensors were then grafted to polystyrene (PS) microspheres through dispersion polymerization. The sensors still retained their detecting ability when they were anchored on the surfaces of PS microspheres. Upon the addition of Hg 2+ ions to the PS microspheres, both the color and the fluorescence intensity changed, which could be employed to detect Hg 2+ ions. The absorption capacity of the two kinds of PS microspheres reached 0.557 mg g −1 and 0.628 mg g −1 respectively. The PS microspheres still remain their fluorescence and absorption even used for five times. These polymeric highly sensitive chemosensors may see their applications in purification of polluted environments. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013 , 51 , 4592–4600
研究领域:
化学
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环境科学
·
材料科学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Ting Liu,Wenqi Wang,Dan Jian,Jiahao Li,He Ding,Dingrong Yi,Fei Liu,Shouyu Wang
In order to detect Hg 2+ in remote and on-site mode, we design a smartphone based optical fiber fluorescence sensor (SOFFS), which is composed of a semiconductor laser for fluorescence signal excitation, a quantum dot modified fiber probe for Hg 2+ sensing, a smartphone with a filter for fluorescence signal collection, and a fiber coupler for connecting fiber probe, laser and smartphone. With the evanescent wave on the optimized combination tapered fiber probe surface, SOFFS has an ultra-low detection limit of 1 nM and a wide detection range between 1 nM to 1000 nM. Besides, it is handheld with a small size of 79×57×154 mm 3 and inner power supply, and the combination tapered fiber probe can be easily replaced, supporting the remote and on-site applications. Additionally, a smartphone application is designed for automatically quantifying the fluorescence signals for accurate and rapid Hg 2+ detection. Since SOFFS is compact and cost-effective, moreover, it can measure Hg 2+ in fast speed, excellent selectivity, high accuracy and sensitivity, it is a potential tool for remote and on-site applications.
研究领域:
分析化学
·
环境监测
·
生物传感
·
光学传感器
·
微量金属检测
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Xuemei Hu,Siying Che,Haiyan Fu,Yuanbin She
Colorimetric detection of trace Hg 2+ relies primarily on enzymes -catalyzed 3,3’,5,5’-tetramethylbenzidine (TMB) reactions, with two inherent drawbacks: substrate solubilization dependence on organic solvents and enzymes-associated limitations. By virtue of unique structural tunability and ionic properties, ionic liquids (ILs) dual-substitute enzymes and organic solvents, breaking through traditional bottlenecks via electrostatic assistance. Specifically, ILs enhance TMB water solubility efficiently through π-π interaction/charge-assisted hydrogen bond (CAHB) synergy, thus obviating organic solvents; meanwhile, CAHB and electrostatic interactions accelerate TMB-Hg 2+ redox reactions, eliminating exogenous H 2 O 2 and enzymes s and cutting response equilibrium time by ~35 min. Experiments confirmed that vs. CAHB-free blank systems shows a 2.2-fold increase in absorbance. Moreover, the system exhibits robust anti-interference, maintaining high sensitivity and stability across the pH range of 4.0–6.0. The paper-based ILs sensor allows naked-eye, on-site detection of trace Hg 2+ efficiently.
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Analytical Methods
·
2023
·Vol. 15
·期 21
·2599-2605
·
IF 3.1
Yanli Li,Yanmei Si,Genmei Yang,Lixia Yang,Hua Wang
A target-responsive ratiometric fluorimetric sensing strategy for Hg2+ has been rationally designed. The sensing probe was established based on a functionalized metal–organic framework, which was prepared with 3,5-dicarboxyphenylboronic acid (DCPB) as the functional ligand and Eu3+ as the metal junction. The porous nano-spheres of Eu-MOF with an arylboronic acid as the functional recognition group for Hg2+ exhibited tunable optical properties with dual emission fluorescence signals at 338 nm and 615 nm. In the presence of Hg2+, arylmercury was formed by a specific transmetalation reaction between Hg2+ and arylboronic acid groups, which blocks the energy transfer between the ligand and Eu3+. Thereby, the fluorescence signal of Eu-MOF/BA at 615 nm decreased, while the fluorescence signal at 338 nm remained almost constant. The ratiometric fluorimetric sensing for Hg2+ was achieved by calculating the peak intensity ratio of F615/F338 based on the reference signal at 338 nm and the response signal at 615 nm. The detection limit of Hg2+ was as low as 0.0890 nM, and the recovery rate of the actual environmental water sample ranged from 90.92% to 118.50%. Therefore, the excellent performance of the ratiometric fluorimetric sensing method for Hg2+ makes it attractive for the detection of heavy metal ions in environmental monitoring.
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PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Jiao He,Congwei Li,Xinjian Cheng
Three chitosan-BODIPY probes were prepared in this work. The water solubility of original chitosan has been improved. Water soluble fluorescent probes were obtained. They also exhibited good sensing ability to Hg 2+ /Hg + ions. Firstly, through the amidation reaction, arginine, cysteine, and tryptophan were grafted respectively onto chitosan chains. And then chitosan-BODIPY probes were produced by means of Schiff base formation reaction. By this way, the high structural regularity of chitosan polymer chains was changed with introducing amino acids and fluorescent groups. It also endowed fluorescence sensing ability. They could recognize Hg 2+ /Hg + ions with the interaction of C N groups. It could selectively recognize Hg 2+ /Hg + in aqueous solution, the detection limits reached 0.747μM/0.783 μM. Moreover, by the introduction of hydrophilic groups, the contact angle of modified chitosan film was improved as well. It realized performance transformation from the hydrophobic to hydrophilic. The viscoelasticity , thermal, rheological properties and fluorescence properties of the hydrogels were investigated. C N groups not only acted as a binding site to coordinate with heavy metals, but also could enhance the water solubility of the fluorescent chitosan.
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高影响因子
POLYMER BULLETIN
·
2023
·
IF 3.2
Huang Jiali,Dong Ruirui,Habibul Marhaba,Zhang Yanhui,Guan Ming,Li Guixin
It is of great significance for human health and environmental monitoring to establish an ultrasensitive assay method for Hg 2+ . In this work, a label-free and highly sensitive electrochemiluminescence (ECL) aptasensor was developed for the sensitive and selective detection of Hg 2+ without additional coreactants. Poly (aniline-luminol)/graphene oxide (P(ANi-Lu)/GO) nanocomposites were prepared, and chitosan (CS) was used to modify the surface of the material positively charged. The prepared P(ANi-Lu)/GO/CS was characterized by scanning electron microscopy (TEM), UV–Vis absorption spectra, fluorescence spectra and electrochemical impedance spectroscopy. The P(ANi-Lu)/GO/CS exhibited a stable and excellent electrochemiluminescence (ECL) property. Aptamer was adsorbed on P(ANi-Lu)/GO/CS sensing interface through electrostatic interaction, and Hg 2+ was detected using T-Hg 2+ -T configuration as ECL intensity controller. The results showed that Hg 2+ can be quantitatively determined in the range of 1.0 × 10 −15 ~1.0 × 10 −7 M with a detection limit of 4.8 × 10 −16 M. Graphical abstract
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