NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 23
·19224-19231
·
IF 3.201
Wei Sun,Rong Chen,Xinjian Cheng,Luminita Marin
Detection of heavy metals with high sensitivity and selectivity is of vital importance. In this study, we report the synthesis of small molecular chemosensors and the fabrication of corresponding macromolecular fluorescent chemosensors. Boron dipyrrole methane (BODIPY)-derived chemosensors, BE and BB, were designed and synthesized first. Then, they were incorporated into polymeric derivatives to prepare macromolecular fluorescent chemosensors. The small molecular sensors were highly sensitive and selective to Hg2+. Other ions and albumin did not exhibit clear interference to the sensing of Hg2+ ions. Once the macromolecular chemosensors were formed, the recognition ability was preserved; moreover, the sensitivity was even enhanced by the “molecular wire” mechanism. The minimum detection limits of four macromolecular chemosensors, PBEP, PBEB, PBBP and PBBB, for Hg2+ reached 2.05 μM, 0.23 μM, 4.23 μM, and 0.15 μM, respectively. Under natural light, the addition of Hg2+ led to significant color changes; also, they can be used as Hg2+-sensitive “naked eye” indicators in the natural environment.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Man-Qing Yang,Cai-Ping Zhou,Yun Chen,Jian-Jiang Li,Cheng-Hui Zeng,Shengliang Zhong
A new dinuclear europium cluster (Eu-cluster) is synthesized and the exact structure is determined by single-crystal X-ray diffraction. The formula of the Eu-cluster is determined to be [Eu 2 (4-Msal) 6 (phen) 2 (H 2 O) 2 ] (4-Msal = 4-methylsalicylic acid, phen = phenanthroline), it crystallizes in the triclinic space group P -1, with a = 9.1193(8) Å, b = 13.0855(10) Å, c = 14.0981(9) Å, α = 103.159(6)°, β = 94.192(6)°, γ = 100.632(7)°, V = 1598.3(2) Å 3 and Z = 1. Further investigation reveals that the Eu-cluster is a highly sensitive and selective methylmercury (CH 3 Hg + ) sensor. To the best of our knowledge, this is the first CH 3 Hg + sensor based on lanthanide clusters/complexes. The responsive behavior shows the sensing has excellent linearity in 1.4–3.8 μg L −1 μM. The LOD for sensing CH 3 Hg + is 0.8 μg L −1 , which meets the standard of Chinese environmental quality standard for agricultural and industrial water. Interestingly, study also reveals the sensor is applicable in real water sensing.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
LUMINESCENCE
·
2017
·Vol. 32
·期 6
·1092-1099
·
IF 1.509
Tingting Luo,Shiting Zhang,Yujue Wang,Meina Wang,Mei Liao,Xingming Kou
In this paper, an innovative and facile one-pot method for synthesizing water-soluble and stable fluorescent Cu nanoclusters (CuNCs), in which glutathione (GSH) served as protecting ligand and ascorbic acid (AA) as reducing agent was reported. The resultant CuNCs emitted blue-green fluorescence at 440 nm, with a quantum yield (QD) of about 3.08%. In addition, the prepared CuNCs exhibited excellent properties such as good water solubility, photostability and high stability toward high ionic strength. On the basis of the selective quenching of Hg 2+ on CuNCs fluorescence, which may be the result of Hg 2+ ion-induced aggregation of the CuNCs, the CuNCs was used for the selective and sensitive determination of Hg 2+ in aqueous solution. The proposed analytical strategy permitted detection of Hg 2+ in a linear range of 4 × 10 −8 to 6 × 10 −5 M, with a detection limit of 2.2 × 10 −8 M. Eventually, the practicability of this sensing approach was confirmed by its successful application to assay Hg 2+ in tap water, Lotus lake water and river water samples with the quantitative spike recoveries ranging from 96.9% to 105.4%.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 48
·17800-17809
·
IF 4.052
Kan Li,Jing-jing Li,Ni Zhao,Ting-ting Xie,Bin Di,Li-li Xu
Hg2+ is highly toxic and hazardous and widely found in polluted water. To remove mercury ions from wastewater, there is an urgent need to investigate and develop new adsorbents. Herein, we synthesized three novel thioether-based metal–organic frameworks (MOFs) through a facile diffusion method or a solvothermal strategy, i.e. [(ZnCl2)3(L1)2·χ(solvent)]n (1), [(Cu2I3O2)4(CH4N0.5)4(L1)4(DMA)4·3(H2O)·χ(solvent)]n (2) and [(CuBr2)2(L2)2 CH3CN·χ(solvent)]n (3), where L1 = 1,3,5-tris((pyridin-4-ylthio)methyl)benzene and L2 = 2,4,6-trimethoxy-1,3,5-tris((pyridin-4-ylthio)methyl)benzene. The obtained thioether-based MOFs were characterized by single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, elemental analysis and thermogravimetric analysis. Further studies revealed that they could remove Hg2+ from water. They have high adsorptivity (up to 362 mg g−1) and are highly efficient in removing Hg2+ (up to 95%). Besides, these MOFs can be recycled and can selectively remove Hg2+ from water in the presence of other metal ions. Consequently, these MOFs are highly promising candidates for the selective absorption and removal of mercury ions from water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Yunqi Hao,Liying Yu,Tingting Li,Lihua Chen,Xu Han,Fang Chai
In this work, the blue emission carbon dots (FA-CDs) are synthesized by one-pot solvothermal method by using folic acid as precursor. The FA-CDs emitted bright emission at 445 nm when excited at 360 nm with the QY of 31.2 %. The FA-CDs exhibit sensitive quenching response to Hg 2+ with variable concentrations systematically, which determined FA-CDs can be employed as fluorescent probe, with a reliable linear relationship between fluorescence intensity and Hg 2+ concentration, and a limit of detection (LOD) of 1.29 nM. Notably, the quenched FA-CDs can be recovered by using EDTA saturated solution with the emission comparable to initial in succession. The FA-CDs based paper sensor can be explored with similar detection performance, and it can also be restored by EDTA saturated solution. Both the restored CDs and paper sensor can be reused in the next turn for detecting Hg 2+ , which allowed the FA-CDs and their paper sensor can be serviced as sustainable probe for Hg 2+ detection. The visual LOD of paper sensor can be determined at 0.1 μM, notably, the paper sensor can be reused at least 3 times with good performance, which is beneficial to environmental protection and saving resources. Possess excellent water solubility and non-toxic properties, the cellular imaging of FA-CDs was evaluated with excellent quality fluorescent image results. The FA-CDs provide a promising convenient fluorescent probe for multi-application in detection and imaging.
研究领域:
分析化学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Qin Wang,Li-Bing Lü,Zhu Tao,Tao Sun,Qing Tang,Ying Huang
In the present work, we have investigated the effect of pH and mercury ions on the host–guest complex formed between cucurbit[7]uril (Q[7]) and Hoechst 33342 (H33342). 1 H NMR, UV–vis and fluorescence spectroscopy revealed that acid/base stimulation could change the binding stoichiometry between Q[7] and H33342. The results suggest that two complexation equilibria (1:1 and 2:1) may exist between H33342 and Q[7] at pH 2.0 and 4.5, respectively. However, a 1:1 host–guest complex was formed between H33342 and Q[7] at pH 7.0 and 10.0. Q[7] shows differential affinities for the protonated and neutral forms of H33342 dye. Moreover, the switching between H33342∙2H + @2Q[7](1:2) at pH 4.5 and H33342∙H + @Q[7](1:1) at pH 7.0 was reversible. Furthermore, as a metal stimulus, Hg 2+ ions could push (i) Q[7] from the piperazine ring to the benzimidazole position with a 1:1 guest–host ratio and (ii) a second Q[7] onto the ethyl position with a 1:2 guest–host stoichiometry. This stimulus response system will have potential applications in the field of molecular switch design.
研究领域:
超分子化学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Tan Qiren,Li Xiaoying,Wang Lumei,Zhao Jie,Yang Qinyan,Sun Peng,Deng Yun,Shen Guoqing
Cadmium (Cd2+) and mercury ions (Hg2+) are essential for the quality control of food samples because of their serious toxicity to human health, but the effective and simple strategy for their parallel detection remains challenging. In this paper, a rapid and simple parallel detection method for Cd2+ and Hg2+ was developed using carbon dots (CDs) as fluorescent sensors. A one-step hydrothermal method with a single precursor l-arginine as both the carbon and nitrogen sources was employed to prepare nitrogen-doped CDs (N-CDs). N-CDs exhibited a uniform particle size and excitation-independent fluorescence emission. The maximum emission wavelength of N-CDs was observed at 354 nm with the excitation wavelength at 295 nm. The quantum yield of N-CDs reached as high as 71.6% in water. By using sodium diphosphate and phytic acid as masking agents, the fluorescent sensor can be quenched by Cd2+ and Hg2+ in the linear range of 0–26.8 μM and 0–49.9 μM within 5 min. Other common ions in farm products showed no significant effect on the fluorescence intensity of the sensing system. The results demonstrated that the sensing system had good selectivity and sensitivity for Cd2+ and Hg2+. The detection limits for Cd2+ and Hg2+ were 0.20 and 0.188 μM, respectively. In addition, the fluorescent sensor had been successfully applied for the detection of Cd2+ and Hg2+ in fruits and vegetables, and the recoveries were 86.44–109.40% and 86.62–115.32%, respectively. The proposed fluorescent sensor provides a rapid, simple, and sensitive detection method for Cd2+ and Hg2+ in food samples and thus a novel quantitative detection method for heavy metal ions in foods.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
·
2023
·Vol. 23
·期 6
·3094
·
IF 3.9
Jinglong Han,Huajun Liu,Ji Qi,Jiawen Xiang,Longwen Fu,Xiyan Sun,Liyan Wang,Xiaoyan Wang,Bowei Li,Lingxin Chen
Traces of mercury ions in environmental water can harm humans and animals. Paper-based visual detection methods have been widely developed for the rapid detection of mercury ions; however, existing methods are not sensitive enough to be used in real environments. Here, we developed a novel, simple and effective visual fluorescent sensing paper-based chip for the ultrasensitive detection of mercury ions in environmental water. CdTe-quantum-dots-modified silica nanospheres were firmly absorbed by and anchored to the fiber interspaces on the paper’s surface to effectively avoid the unevenness caused by liquid evaporation. The fluorescence of quantum dots emitted at 525 nm can be selectively and efficiently quenched with mercury ions, and the ultrasensitive visual fluorescence sensing results attained using this principle can be captured using a smartphone camera. This method has a detection limit of 2.83 µg/L and a fast response time (90 s). We successfully achieved the trace spiking detection of seawater (from three regions), lake water, river water and tap water with recoveries in the range of 96.8–105.4% using this method. This method is effective, low-cost, user-friendly and has good prospects for commercial application. Additionally, the work is expected to be utilized in the automated big data collection of large numbers of environmental samples.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Wenge Yang,Shouhai Yang,Qirun Guo,Tuan Zhang,Keyi Wu,Yonghong Hu
A phenothiazine–aminothiourea-based open chemosensor ( P1 ) has been designed and synthesized, which exhibits high selectivity toward Hg 2+ by forming a 1:1 complex. In its Hg 2+ ensemble, it is reported as a highly sensitive and selective probe for the detection of iodide based on the displacement approach in aqueous solution. The addition of iodide to a solution of phenothiazine–aminothiourea–Hg 2+ ensemble resulted in a rapid and remarkable fluorescence off–on (emission at 565 nm). The practical use of an ‘ensemble’ was demonstrated by its application to the detection of iodide in the living cells.
研究领域:
分析化学
·
生物医学
·
材料科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2014
·
IF 2.129
Shangwen Chen,Pipi Wang,Chunmei Jia,Qiang Lin,Wenbing Yuan
A fluorescent Hg 2+ -selective chemosensor, 2,5-dimethoxybenzaldehyde thiosemicarbazone ( 1 ), was quantitatively prepared by grinding 2,5-dimethoxybenzaldehyde and thiosemicarbazide together in a ball mill for 15 min. The excitation and emission maxima of compound 1 are 347 and 450 nm, respectively. The reaction of this ligand with Hg 2+ was investigated by FT-IR, 1 H NMR, and fluorescence titration. Results show that the composition of the resulting Hg complex 1 -Hg is 2:1 1 :Hg, and that the S and imino N atoms serve as the binding sites of the ligand to the Hg 2+ ions. Coordination-assisted fluorescence quenching results show that compound 1 exhibits a highly selective fluorescence response to trace amounts of Hg 2+ in water. More importantly, the resulting complex 1 -Hg can be used as a turn-on fluorescence probe for I − at a detection limit of 8.4 × 10 −8 M. Thus, compound 1 is a relatively stable, sequential, cyclic fluorescent probe for Hg 2+ and I − .
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Analysis and Testing
·
2017
·Vol. 2
·期 1
·90-97
·
IF 0
Wang Zhong-Xia,Li Qi-Le,Kong Fen-Ying,Wang Wei,Ding Shou-Nian
In this paper, dual-stabilizer-capped CdTe quantum dots were used as modulated photoluminescence (PL) sensors for the subpicomolar level detection of copper(II) (Cu 2+ ) and mercury(II) (Hg 2+ ) ions in aqueous solution for the first time. The dual-stabilizer-capped CdTe quantum dots were synthesized using mercaptopropionic acid (MPA) and sodium hexametaphosphate (SHMP) as surface-modified ligands via a convenient hydrothermal process. The researches showed a low interference response of the MPA-SHMP-capped CdTe quantum dots towards other metal ions. The highly efficient PL quenching ability in the presence of Hg 2+ or Cu 2+ ions due to the formed nonfluorescent metal complexes via robust Hg 2+ –O interaction with the carboxy oxygen elements of surface ligands of MPA, and on the basis of the competitive binding of the mercapto groups of the MPA between the CdTe quantum dots and the Cu 2+ ions, respectively, which allowed the analysis of Hg 2+ or Cu 2+ ions down to the picomolar levels. Under optimal conditions, the response of the MPA-SHMP-capped CdTe quantum dot PL intensity is linearly proportional to the Cu 2+ and Hg 2+ ion concentration ranging from 0.1 to 1000 and 0.3 to 1000 nM with a detection limit of 41.6 and 97.0 pM, respectively. The diagnostic capability and potential in practical applications of this method have been demonstrated by detecting Cu 2+ and Hg 2+ ions in environmental water samples.
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 已验证
DOI
RSC Advances
·
2013
·Vol. 3
·期 46
·24618-24624
·
IF 2.562
Dongyue Su,Xin Yang,Qingdong Xia,Fang Chai,Chungang Wang,Fengyu Qu
This paper describes the sensing application of water-dispersible thioctic acid functionalized gold nanoparticles (TA-GNPs) as sensors for the colorimetric detection of Hg2+ ion in water samples. The state and stability of thioctic acid decorated gold nanoparticles in pH range (pH = 4–11) were evaluated by UV/vis spectra. The thioctic acid modified GNPs could be induced to aggregate quickly in the presence of Hg2+, especially after adding a solution of 0.05 M NaCl. The detection of Hg2+ by TA-GNPs at different pH values (pH = 5, 7, 9, 11) was also investigated to optimize the experimental conditions in detail. The result indicated that the TA-GNPs at pH 5 were the most optimal choice for detecting Hg2+. The detection results of Hg2+ could be determined by the naked eye or a UV-vis spectrophotometer. The detection of Hg2+ could be realized with a detection limit of 10 nM over a long range (10 nM to 20 μM). Additionally, the selectivity of this method has been investigated using other metal ions. The TA-GNPs can selectively bind Hg2+ over other metal ions (Pb2+, Mg2+, Zn2+, Ni2+, Cu2+, Co2+, Ca2+, Mn2+, Fe2+, Cd2+, Ba2+, Ag+ and Cr3+), leading to prominent color change. This will provide a simple and effective colorimetric sensor (no DNA) for on-site and real-time Hg2+ ion detection. More importantly, this probe was also applied to determine the Hg2+ in lake samples, and the results demonstrate low interference and high sensitivity.
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）