JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Yongdi Liang,Xiaofeng Wang,Meixi Chen,Attiq Ur Rehman,Xiuli Wang,Zhaoli Xue,Long Zhao
A Schiff base fluorescent chemosensor based on rhodamine and benzothiophene (denominated as RhoBenz ) was designed and synthesized for the detection of Hg 2+ ions. Comprehensive analysis of the sensor's performance was conducted including UV-vis and fluorescence titration, mass spectrometry (MS), and other quantitative evaluations such as linearity plots and Job's plot analysis. The sensor was demonstrated with excellent selectivity for Hg 2+ over other metal ions with minimal interference, high sensitivity, and a low limit of detection (0.045 μM). It is noteworthy that RhoBenz has a relatively high quantum yield (0.43). The pH response of the sensor was promising, and comparative analysis with existing probes highlighted its superior performance. In addition, RhoBenz exhibited extremely low cytotoxicity and excellent penetration, which demonstrated its promising utility in live cells and zebrafish.
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DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Jin Wang,Xinyu Lu,Huafeng Wang,Yuan Zhong,Zhihui Dai,Tianxiang Wei
In this work, Ru(bpy) 3 2+ -loaded gold nanocage (AuNCs) (Ru–AuNCs) was prepared and found to display a distinct property of electrochemiluminescence (ECL) enhancement under mercury ions (Hg 2+ ) interaction. Based on this, we designed a screen-printed bipolar electrode-ECL (SPBPE-ECL) sensing platform by coupling with the thymine-Hg 2+ -thymine (T-Hg 2+ -T) binding pattern for one-step highly sensitive detection of Hg 2+ . This ECL sensor showed a wide linear detection range (0.75 – 850 μg L −1 ) and low detection limit (0.1290 μg L −1 ) toward Hg 2+ , with a one-step detection procedure and disposable feature, displaying potential applicability in the point-of-care-testing (POCT) of Hg 2+ in the environment. In addition, the Hg 2+ -mediated ECL signal enhancement mechanism of Ru–AuNCs was also investigated. It was confirmed that Hg 2+ interaction etched the cage structure of Ru–AuNCs, which sped up the release of more Ru(bpy) 3 2+ around the sensing electrode. Furthermore, Au–Hg alloy structure was formed on the surface of Ru–AuNCs, which also improved the ECL signal. This target-induced in-situ sensing material surface reconstruction strategy would provide a better design concept for the construction of ECL POCT sensor.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Jieyuan Zhang,Ting Wang,Yuxuan Du,Yue Wu,Xinhui Jiang,Hecun Zou,Zhengwei Zhang
Mercury metal can be absorbed into human body through the food chain, and cause considerable harm to human health. Herein, a novel smartphone-enabled ratiometric fluorescence sensing system, which was made up of nitrogen-sulfur co-doped carbon dots (NSCDs) and Au nanoclusters (AuNCs), had developed for rapid detection of mercury ion (Hg 2+ ). The NSCDs/AuNCs displayed dual-emission fluorescence at 406/690 nm. After introducing Hg 2+ , the fluorescence at 690 nm was obviously quenched, while the signal around 406 nm was slightly attenuated, causing a color change from pink-purple to blue. Under the most suitable conditions, the ratiometric fluorescence probe had two linear ranges of 0.05–3.0 and 3.0–7.0 μM with a low limit of detection (LOD) of 18 nM. The approach was utilized to detect Hg 2+ in real water samples. Furthermore, a portable smartphone-assisted sensing platform based on NSCDs/AuNCs provides a simple, affordable, and efficient method for monitoring Hg 2+ in the environments and other fields.
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Yiming Tang,Huicong Zhang,Fashe Li,Hua Wang
In this study, a high-efficiency seaweed-based porous biochar was synthesized via a combined pre-impregnation and template method for effective removal of Hg 2+ from aqueous solutions. The biochar was fabricated by pyrolyzing hydrochloric acid-impregnated seaweed biomass with ZnCl 2 as a template under nitrogen atmosphere. Key preparation parameters, including pyrolysis temperature (500–800 °C), heating rate (5–20 °C·min –1 ), holding time (60–210 min), and biomass–template mass ratio (0.5:1–5:1), were systematically optimized to enhance adsorption performance of biochar. Under optimal conditions (pyrolysis temperature: 600 °C, heating rate: 10 °C·min –1 , holding time: 150 min, biomass–template mass ratio: 3:1), the prepared biochar exhibited a remarkable adsorption efficiency of 87.12% for 200 mg·L –1 Hg 2+ aqueous solution, with an adsorption capacity of 87.12 mg·g –1 . Cl introduced via pre-impregnation and template method facilitated the formation of stable chloromercury complexes ( e.g ., HgCl 2 ). Oxygen-containing functional groups ( e.g ., –COOH) on the biochar surface promoted Hg 2+ adsorption through coordination bonding and electrostatic interactions. Notably, the ZnCl 2 templating method significantly enhanced the biochar’s specific surface area, creating abundant pore structure for Hg 2+ adsorption. The collaborative pre-impregnation and template strategy significantly simplifies the preparation and modification process of biochar. In addition, it provides a new method for chlorine enrichment and pore structure optimization of biochar, thus achieving breakthroughs in adsorption efficiency, capacity, and process simplification of Hg 2+ removal.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yiqing Lv,Xiaohan Li,Yan Du,Jinting Zou,Jinyan Yu,Ji Yang,Limei Cao
As a highly toxic heavy metal, mercury is bioaccumulative and persistent, causing environment pollution and posing potential risks to human health. This study focuses on Hg 2+ in aquatic environments and proposes an electrochemical method to reduce and recycle of Hg 2+ , aiming to mitigate mercury pollution and prevent ecological risks associated with mercury methylation. A graphite felt(GF) composite electrode incorporating Co-doped molybdenum disulfide(Co/MoS 2 @GF) was developed for efficient Hg 2+ removal from wastewater, which was synthesized by a one-step solvothermal method. The Co/MoS 2 @GF(n(Mo):n(Co) = 12:1) electrode achieved 95.0 % Hg 2+ removal efficiency in its initial use, and maintained a consistent Hg 2+ removal efficiency over 87.0 % after five reuse cycles, demonstrating high mercury removal capability and remarkable stability. The Co doping optimized the material’s surface morphology and electronic structure. This modification increased the number of active sites that can generate a large amount of active hydrogen(H*), significantly enhancing mercury reduction efficiency. We determined the optimal reaction conditions for the electrode through influencing factors analysis. The design electrochemical reduction system combines facile synthesis with environmental compatibility, providing a technologically relevant strategy for mercury-contaminated wastewater remediation and concurrent mercury resource recovery, demonstrating significant application potential.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2014
·
IF 4.517
Yanlin Lv,Lili Zhu,Heng Liu,Yishi Wu,Zili Chen,Hongbing Fu,Zhiyuan Tian
A new type of fluorescent probe capable of detecting Ag + and Hg 2+ in two independent channels was developed in the present work. Specifically, in CH 3 CN–MOPS mixed solvents with CH 3 CN/MOPS ratio (v/v) of 15/85, this type of probe fluoresced weakly, and the addition of Ag + remarkably induced fluorescence enhancement of the probe. In CH 3 CN–MOPS mixed solvents with the percentage of CH 3 CN increased up to 65%, the probe was highly fluorescent and addition of Hg 2+ dramatically induced the fluorescence quenching. Thus, using such single-fluorophore-based probe and tuning the polarity of the mixed solvent, Ag + , and Hg 2+ can be detected in independent channels with high selectivity and sensitivity. As a result, the mutual interference usually encountered in most cases of Ag + and Hg 2+ sensing owing to the similar fluorescence response that these two ions induced, can be effectively circumvented by using the probes developed herein.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zijing Wang,Junlong Li,Tianyu Duan,Chenyu Fu,Chunxing Wu,Yidian Wang,Chunfang Li,Peizhi Guo,Tianrong Zhan,Dongxiang Li
Metal nanoclusters have attracted considerable interest due to their unique fluorescence properties in the fields of environmental monitoring, chemical detection and biosensing. In this study, we developed a rapid synthesis method for highly red-emitting gold nanoclusters (AuNCs) via direct reduction of precursor HAuCl 4 by sodium borohydride in presence of glutathione (GSH) at 0 °C. Our results demonstrated that the precursor quality had an important effect on the luminescence properties of the AuNCs, only the samples derived from high-purity precursors (99.9 % and 99.99 %) emitted strong red fluorescence. The obtained AuNCs can be excited in a broad range of 250–600 nm and can emit fluorescence of 560–730 nm. The maximum fluorescence quantum yield of the AuNCs derived from 99.99 % precursor achieved a high value of 9.98 %. Additionally, these fluorescent nanoclusters exhibited high selectivity toward Hg 2+ by quenching. A linear calibration range of 10–100 μM Hg 2+ was demonstrated with a limit of detection (LOD) of 1.45 μM using the as-obtained AuNCs as fluorescence probes, and in a narrowed range of 1–25 μM Hg 2+ , a LOD of 0.13 μM was determined using the diluted nanoclusters as probes. These results offer a significant reference for the synthesis and application of the AuNCs as fluorescence nanoprobes.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Yuan Zhou,Zhanfang Ma
Gold nanoclusters (AuNCs), due to their enzyme-like activity, can catalyze the decomposition of hydrogen peroxide (H 2 O 2 ), which can be used to reduce HAuCl 4 into gold nanoparticles (AuNPs). Hg 2+ effectively decreases the catalytic ability of AuNCs to decompose H 2 O 2 by the interactions between Au + on surface of AuNCs and Hg 2+ . In a system containing AuNCs, H 2 O 2 , and HAuCl 4 , increasing the Hg 2+ concentration prompts a color change from purple to red of the solution of as-synthesized AuNPs, which results from the increase in residual H 2 O 2 after decomposition by AuNCs. Based on this principle, a novel colorimetric method for ultrasensitive detection of mercury ions was developed in this work. AuNPs synthesized by a one-step method without modification were used to directly detect mercury ions in lake and river water samples. The detection limit of the present method was determined to be 8:9 pM with a linear response range of 0.1 nM–10 μM, which is much lower than the standard value defined by the Environmental Protection Agency (EPA). The method not only possesses advantages of convenience and simplicity, but also is promising for application in real samples.
研究领域:
分析化学
·
环境科学
·
纳米技术
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Han Wu,Yu Wang,Duan Jiang,Xiaomin Chen,Jingping Tan,Zhenlin Xu,Hongtao Lei,Xiangmei Li
Background Mercury is one of the most toxic heavy metal contaminants that can be harmful to human health through the food chain. Recently, the colorimetric detection of heavy metals based on nanozyme catalytic activity has received extensive interest due to the simplicity, signal visibility and suitability for in situ detection. However, the majority of these nanozymes that can be utilized for detecting mercury with high synthesis temperature and complicated synthesis methods, which limited their practical application. Results In this work, flower-like ZnO@Pt composites were simply synthesized at room temperature , the flower-like structure and the high electron mobility of ZnO endow ZnO@Pt with stronger peroxidase-like activity. Consequently, dual-mode (UV–vis and smartphone) colorimetric sensors were designed to detect Hg 2+ . In UV–vis mode, the Hg 2+ concentration linear range was 10–400 nM, and the limit of detection (LOD) was 0.54 nM. In smartphone mode, the Hg 2+ concentration linear range was 50–1250 nM, and the LOD was 29.8 nM. A parallel analysis in 3 real water samples was confirmed by ICP-MS, the results showed good correlations (R 2 > 0.98), indicating the practical reliability of these sensors. Significance The novel flower-like ZnO@Pt composites with high stability, catalytic activity and Hg 2+ response were simply synthesized at room temperature, simplifying the synthesis steps and reducing costs. The sensitivity of the developed colorimetric sensor in UV–vis mode was 3–145 times higher than that of the similar methods. The colorimetric sensor in smartphone mode broadened the detection range and improved the portability of Hg 2+ detection. Thus, the dual-mode (UV–vis and smartphone) colorimetric sensors providing new detection modes for rapid monitoring of Hg 2+ in environmental water.
研究领域:
环境科学
·
分析化学
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 17
·8899-8904
·
IF 3.269
Lei Long,Xu Tan,Shenglin Luo,Chunmeng Shi
Mitochondria are one of the major targets for localization of mercury ions, where serious mercury-induced toxicity has been well documented. Here, we design two heptamethine cyanine dyes coupled with thymines on the N-alkyl chains, which can specifically chelate with Hg2+ by forming a T–Hg–T complex to sensitively detect Hg2+ in both aqueous solution and the mitochondria of living cells. Further studies revealed that the introduction of fluorine atoms on thymines would significantly enhance the binding ability of T–Hg–T, providing clues to develop more specific and sensitive Hg2+ sensors.
研究领域:
生物化学
·
分析化学
·
细胞生物学
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DOI
高影响因子
TALANTA
·
2011
·Vol. 85
·期 4
·1738-1743
·
IF 3.722
Junling Duan,Xiaochen Jiang,Shouqing Ni,Min Yang,Jinhua Zhan
This paper described an investigation of a novel eco-friendly fluorescence sensor for Hg 2+ ions based on N-acetyl- l -cysteine (NAC)-capped ZnS quantum dots (QDs) in aqueous solution. By using safe and low-cost materials, ZnS QDs modified by NAC were easily synthesized in aqueous medium via a one-step method. The quantitative detection of Hg 2+ ions was developed based on fluorescence quenching of ZnS QDs with high sensitivity and selectivity . Under optimal conditions, its response was linearly proportional to the concentration of Hg 2+ ions in a range from 0 to 2.4 × 10 −6 mol L −1 with a detection limit of 5.0 × 10 −9 mol L −1 . Most of common physiologically relevant cations and anions did not interfere with the detection of Hg 2+ . The proposed method was applied to the trace determination of Hg 2+ ions in water samples. The possible quenching mechanism was also examined by fluorescence and UV–vis absorption spectra .
研究领域:
环境化学
·
分析化学
·
纳米材料
·
荧光传感
·
重金属检测
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
·
IF 3.07
Jie Zhao,Baocun Zhu,Haiqin Yu,Liangguo Yan,Qin Wei,Bin Du
On the basis of high selective and sensitive interaction of 1,8-naphthalimide with Hg 2+ and the formation of stable neutral imide-Hg-imide complexes, we designed and synthesized a novel magnetic fluorescent sensor ( S1 ) employed Fe 3 O 4 magnetic nanoparticles and 1,8-naphthalimide fluorescent sensor. Under optimum conditions, S1 exhibits the high selectivity toward Hg 2+ over other metal ions, with the detection limit of 1.03 × 10 −8 M. We demonstrated that a reliable fluorescence response of S1 toward Hg 2+ over a broad pH range (pH = 5.0–9.0) could be reused at least four cycles. The maximum sorption capacity of S1 was about 5.6 mg g −1 . In addition, the removal of Hg 2+ in water was achieved by the aggregation-induced sedimentation (AIS) strategy. Moreover, the suspended magnetic nanoparticles could be removed by external magnetic field , and the secondary pollution was avoided. The above-mentioned results indicate that this approach may serve as a foundation of the preparation of the multifunctional magnetic fluorescent sensor for simple, rapid, and simultaneous determination and removal of trace Hg 2+ and other pollutants in environmental samples.
研究领域:
分析化学
·
环境科学
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高影响因子
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