INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Liyan Wang,Cihan Lou,Ming Zhao,Bing Zhao,Huaping Zhao,Wenhui Ma,Aiqi Wang,Xu Wang,Ning Wang,Yifei Li
A small-molecule fluorescent probe ( BNBC ) based on naphthalene for cascade recognition of Hg 2+ and I – in 50% CH 3 CN/H 2 O solution. The sensitive and selective binding behaviors of BNBC were investigated by fluorescence spectroscopy. With the addition of metal ions , the fluorescent probe BNBC showed high sensitivity and selective ratiometric detection of Hg 2+ , which was attributed to the excimer-monomer emissions of naphthalene . Moreover, the BNBC -Hg 2+ complex showed a selective fluorescence “turn-off” for I – via the formation of three-component ensemble.
研究领域:
分析化学
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材料科学
·
光谱学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 11
·8729-8735
·
IF 3.289
Suyan Wang,Limin Wang,Hongfu Chen,Yulong Wang,Jia Cai,Mingming Yang,Fengquan Liu
Here, a specific anti-Hg2+ monoclonal antibody (mAb) was generated and an eco-friendly immunochromatographic test strip (EFITS) based on a mAb-nanogold probe for rapid and specific detection of Hg2+ in water was developed. In the method, the conjugation of Hg–MNA (6-mercaptonicotinic acid)–BSA (bovine serum albumin) was synthesized as an immunogen, the conjugation of MNA–OVA (ovalbumin) was synthesized and selected as a coating antigen. The specific anti-Hg2+ mAb from BALB/C female mice was screened based on a competitive immunoassay. The coating antigen and goat anti-mouse IgG antibody were coated on a nitrocellulose membrane (NC membrane) as a test line and a control line, respectively. The anti-Hg2+ mAb-nanogold probe was applied to the conjugate pad. Hg2+ competes with OVA–MNA for the mAb-nanogold probe causing a color change on the test line corresponding to the Hg2+ content. Thus, we can distinguish the subtle differences through a strip reader. The resulting EFITS is able to detect Hg2+ with LOD of 0.4 ng mL−1 at 9 min by quantitative analysis. EFITS demonstrated here is eco-friendly (without Hg2+ on the strip), capable of rapid detection, and does not require chelators.
研究领域:
环境科学
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分析化学
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生物技术
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Jingyu Pang,Ruyan Xie,Sophie Chua,Yu Zou,Mingyu Tang,Fang Zhang,Fang Chai
A dual-mode colorimetric and fluorimetric probe was successfully established based on silver/copper bimetallic nanoparticles (AgCu-BNPs). The AgCu-BNPs were confirmed as individually bimetallic nanoparticles with a mean size of 7.7 ± 0.2 nm, as characterized by high resolution transmission electron microscopy. Intriguingly, the AgCu-BNPs possess both surface plasmon resonances (SPR) and fluorescence emission. AgCu-BNPs emanate bright blue fluorescence with optical emission centered at 442 nm with high quantum yield of 30.3%, and AgCu-BNPs were attenuated or even quenched by Hg 2+ via both static and dynamic quenching, coincidently accompanied by a visible color change, which endow AgCu-BNPs a unique utility as dual-mode colorimetric and fluorimetric probes. The detection limits as low as 89 nM and 9 nM were determined by dual-mode of AgCu-BNPs, respectively. The recovery rates in real samples were found to be 97.3–118.8%, and 89.5–112.7% by colorimetric and fluorescent methods separately, demonstrates the good environmental tolerance of the dual-mode probe.
研究领域:
分析化学
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环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
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.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Tian Si-Yu,Ding Zhu,Yao Mu-Lan,Liu Si-Mian,Hou Xiang-Yang,Tang Long,Yue Er-Lin,Wang Xiao,Wang Ji-Jiang
A three-dimensional UiO-67-BDA with various pore structures and abundant active binding sites is constructed, and Fe@UiO-67-BDA composites with electrochemical sensing and recognition performance were further prepared by successfully loading Fe 3+ ions. The different modified electrodes (Fe@UiO-67-BDA/GCE, UiO-67-BDA/GCE, Fe/GCE) and the bare electrode (GCE) were also characterized in terms of basic structure and electrochemistry, and it was found that the basic structure and electrochemical performances of Fe@UiO-67-BDA/GCE were better than those of the remaining three electrodes, with good selectivity, reproducibility and stability. And the Fe@UiO-67-BDA/GCE sensor with good electrochemical performance was constructed under the optimal working potential (E pa = 0.59 V) and experimental conditions, which was utilized to rapidly and accurately detect heavy metal ions Hg 2+ by the DPV method, with a detection limit of up to 1.642 × 10 −9 M. In addition, the electrochemical behavior mechanism of the Fe@UiO-67- BDA/GCE sensor was investigated. Finally, the sensor was applied to detect cosmetic heavy metal ions, and the experimental results also showed high reliability and practicality. Therefore, MOFs composite material is applied to the field of electrochemistry, because of its simple operation technology, fast detection speed and high sensitivity, so that it has a greater application prospect.
研究领域:
分析化学
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2013
·Vol. 15
·期 6
·1-9
·
IF 2.175
Xu Yaohui,Zhou Yang,Ma Wenhui,Wang Shixing,Li Shaoyuan
Abstract The Fe 3 O 4 nanoparticles [NPs] coated with silica nanoparticles were designed and prepared, the obtained Fe 3 O 4 @SiO 2 NPs have uniform spherical morphology with a mean diameter of about 22 nm. The inert silica coating on the surface of Fe 3 O 4 NPs not only significantly prevented their aggregation in solution but also improved their chemical stability and provided wider sites for surface modification with organic chemosensors. Subsequently an attempt had been made that the as-synthesized Fe 3 O 4 @SiO 2 NPs were modified by N -(rhodamine-6G) lactam–ethylenediamine, the functionalized magnetic Fe 3 O 4 @SiO 2 NPs (Fe 3 O 4 @SiO 2 -Rho) served as a “naked eye” fluorescent sensor to detect Hg 2+ . The Fe 3 O 4 @SiO 2 -Rho NPs exhibited selective “turn-on” type fluorescent change from colorless to orange when adding to Hg 2+ . In addition, the adsorption experiments revealed that the Fe 3 O 4 @SiO 2 -Rho NPs had effective removal toward Hg 2+ . Moreover, the functionalized Fe 3 O 4 @SiO 2 microspheres displayed superparamagnetic properties, which made it easier to separate the nanocomposites from the liquid phase by adding an external magnetic field. Our efforts provided a potential magnetic nanomaterial for sensitive detection and removal toward Hg 2+ simultaneously. Graphical Abstract A rhodamine 6G derivative functionalized Fe 3 O 4 @SiO 2 nanoparticles were designed and synthesized (as Fe 3 O 4 @SiO 2 -Rho). The Fe 3 O 4 @SiO 2 -Rho exhibited selective “turn-on” type fluorescent change from colorless to orange with Hg 2+ , which constituted an Hg 2+ -selective fluorescent colorimetric nanosensor.
研究领域:
材料科学
·
环境化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Tingting Li,Yuzhuo Tuo,Yunqi Hao,Jingyu Pang,Miaomiao Tian,Samuel Lalthazuala Rokhum,Fang Zhang,Fang Chai
Determination of Hg2+ is crucial as its high toxicity poses a potential serious threat to food and the environment. Therefore, it is urgent to explore a portable, cost-effective, and visual approach to monitor Hg2+. Herein, ratiometric-constructed dual-emissive carbon dots (P-R-CDs) with dual emissions at 440 and 575 nm were fabricated by blue CDs and orange CDs for visual quantitative detection of Hg2+. The vivid colorimetric sensing can be achieved by quantitative quenching blue emission with Hg2+ and relative stable orange emission. Consecutive fluorescent color transformation with elimination of blue emission by Hg2+ embodied visible distinguishable determination of Hg2+, with a detection limit of 2.9 nM. Furthermore, a smartphone-supported visual sensing platform was established for the determination of Hg2+ by capturing and identifying the RGB value of the variation precisely. The smartphone assistant detection greatly promoted the effectiveness of detection and provided promising on-site application in real samples. The recoveries in real water and food samples revealed the excellent environmental tolerance of P-R-CDs, which represented a prospective application utility for quantitative monitoring of Hg2+ in food and the environment.
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Mengfan Duan,Zhuo Wang,Weiping Zhu,Yufang Xu,Xuhong Qian
The recent discovery of heavy metal pollution in Chinese herbs has raised serious concerns for both human health and the environment. Researchers’ attention has been drawn to the toxicity and bioaccumulation of heavy metal ions. In this paper, a new technical method for preparing ethylene glycol-bis (β-aminoethyl ether)-N,N,N′,N′-tetra acetic acid (EGTA)-functionalized cotton fiber was innovatively proposed, and on this basis, heavy metal ions were successfully removed. First, the surface of cotton fiber (FC) was modified with amino group by reactive dye dyeing method to obtain FN (amino-modified cotton fiber). Subsequently, EGTA anhydride was grafted onto FN to obtain FNE (EGTA-modified cotton fiber). The interaction between materials and metal ions was systematically studied by isothermal titration calorimetry and other methods. The results showed that the adsorption capacity of FNE for Cd2+, Pb2+, and Hg2+ could reach 18.87, 25.84, and 6.69 mg/g, respectively. More importantly, FNE can be reused at least five times in an acidic environment. Furthermore, it is possible to efficiently eliminate heavy metal ions from Chinese herb extracts without compromising the active ingredients. This research provides a brand-new idea and method for solving the problem of removing heavy metal ions from Chinese herb extracts.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2020
·Vol. 36
·期 3
·698-704
·
IF 1.855
Pengfei Fan,Shunzhen He,Jianlin Cheng,Congcong Hu,Can Liu,Shengyuan Yang,Jinquan Liu
A simple and sensitive colorimetric sensing method was constructed for detection of Hg 2+ in aqueous solutions and based on silver nanoparticles functionalized with l -cysteine ( l -Cys–Ag NPs). In this method, adenosine triphosphate (ATP) induced aggregation of l -Cys–Ag NPs. Simultaneously, the solution colour changed from bright yellow to brown. In the presence of Hg 2+ , Hg 2+ chelated ATP to form a complex and reduce the degree of aggregation of l -Cys–Ag NPs and was accompanied by a colour change from brown to bright yellow. The changing values of absorbance at 390 nm were linearly correlated with concentration of Hg 2+ over the 4.00 × 10 −8 to 1.04 × 10 −6 mol·L −1 range, with a detection limit of 8 nM. This method was used successfully for detection of Hg 2+ in real water samples and performed good selectivity and sensitivity. The recovery range was 91.5–109.1%, indicating that the method has vast application potential for determination of Hg 2+ in the environment.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Lingling Li,Gehui Wu,Tao Hong,Zhouyang Yin,Dong Sun,E. S. Abdel-Halim,Jun-Jie Zhu
A rapid and sensitive fluorescence sensing system for melamine based on charge transfer quenching of the fluorescence of graphene quantum dots (GQDs) in the presence of Hg2+ is proposed. The synthesized GQDs were strongly luminescent with predominantly aromatic sp2 domains. Melamine could coordinate with mercury through nitrogen atoms in both its amine and triazine groups and bring more Hg2+ to the surface of GQDs through π–π stacking, thus leading to quenching of the GQDs’ fluorescence. The quenching mechanism was investigated in detail and ascribed to charge transfer from the GQDs to Hg2+ with melamine acting as the linkage agent. The melamine demonstrated a linear range 0.15–20 μM and a detection limit of 0.12 μM, which was far below the regulatory level, suggesting the promising practical usage of this sensing system. This sensing system also possessed high selectivity for melamine in the presence of possible interferences. Finally, this novel sensor was successfully applied for melamine detection in raw milk and satisfactory recovery was achieved.
研究领域:
分析化学
·
食品安全检测
·
纳米材料科学
✓ 已验证
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 21
·17478-17485
·
IF 3.201
Liying Yu,Yaoyao Qu,Fang Chai,Lihua Chen
The highly luminescent blue fluorescent carbon quantum dots (CQDs) were prepared via the one-step hydrothermal method using L-ascorbic acid (LAA) as a carbon source. The obtained carbon quantum dots (LAA-CQDs) demonstrated high sensitivity and selectivity for detecting Cu2+ and Hg2+ based on the efficient fluorescence quenching effect, with the lowest limits of 7.59 nM and 2.29 nM, respectively. Moreover, LAA-CQDs based paper sensors were fabricated, which showed a clear fluorescence response after being exposed to Cu2+ and Hg2+, with visual detection limits of 5 μM and 3 μM, respectively. The cyclic utilization of the paper sensors was realized by restoring their fluorescence after soaking them in saturated ethylene diamine tetraacetic acid solution. The sensors can be recycled to detect Cu2+ and Hg2+ ions for at least four turns, which was conducive to environmental protection and saving resources. The LAA-CQDs with good environmental applicability have been successfully applied for the detection of Cu2+ and Hg2+ ions in real environmental water samples. In addition, we verified the low toxicity and good biocompatibility of LAA-CQDs via cytotoxicity experiments and cell imaging.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2016
·Vol. 26
·期 3
·977-985
·
IF 1.601
Geng Tong-Mou,Wang Xie,Jiang Hui,Song Wan,Ni Ruo-Fan,Chen Jian,Wang Yu
An acrylic monomer bearing xanthene group, N-oxethyl acrylate-N′-rhodamine B hydrazide (ARBHE) was synthesized from N-hydroxyl ethyl-N′-rhodamine hydrazide (RBHE) and acryloyl chloride (Ac) in the presence of triethylamine in dry dichloromethane (CH 2 Cl 2 ) at room temperature. The synthesized ARBHE was identified by FTIR, 1 H NMR spectra and elementary analysis. Copolymer poly(AM-ARBHE) of ARBHE and AM was synthesized with thermal initiator by free radical precipitation polymerization and it was characterized by the method of FTIR and 1 H NMR. Its molecular weights (M η ) was 7.03 × 10 3 g mol −1 and the content of rhodamine units in the polymer chains was 1.44 % in mole fraction. The ability of the poly(AM-ARBHE) to detect different metal cations (Ag + , Ba 2+ , Cd 2+ Co 2+ , Cr 3+ , Cu 2+ , Co 2+ K + , La 3+ , Mg 2+ , Na + , Ni 2+ , Pb 2+ , Fe 2+ , Fe 3+ , Hg 2+ and Zn 2+ ) in water was investigated. Upon addition of Cr 3+ , Fe 3+ or Hg 2+ ions to the aqueous solution, visual color change and fluorescence enhancement were observed. Moreover, other metal ions did not induce obvious changes to the fluorescence spectra except to Fe 2+ . The detection limit of poly(AM-ARBHE) was less than 1 × 10 −11 M. The results suggest that this copolymer may offer potential as a polymeric sensor for Cr 3+ , Fe 3+ and Hg 2+ ions in water.
研究领域:
化学传感器
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）