ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2021
·Vol. 413
·期 15
·3945-3953
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IF 4.157
Yang Jin,Chen Weixing,Chen Xinyu,Zhang Xi,Zhou Hongwei,Du Haotian,Wang Mingcheng,Ma Yiting,Jin Xilang
Novel spherical polymer nanoparticles were synthesized by hyperbranched polyethylenimine (hPEI) and 6-hydroxy-2-naphthaldehyde (HNA) via Schiff base reaction (one-pot reaction), which had great advantages in water solubility and green synthesis. Meanwhile, probe PEI-HNA could quickly detect Cu 2+ in the range of 0–60 μM in 30 s with the detection limit of 243 nM. The fluorescence of PEI-HNA-Cu 2+ could be recovered by the addition of S 2− in 50 s with the detection limit of 227 nM. Based on the excellent optical properties, PEI-HNA has been used in the bioimaging of living cells with excellent cell penetrability and low toxicity. More importantly, PEI-HNA has been doped into filter paper, hydrogel, and nanofibrous film to prepare solid-phase sensors, displaying rapid response and excellent sensitivity. Moreover, the low-cost and simple preparation of these sensors offers great potential and possibilities for industrialization, which could help accelerate the development of sensors in environmental and biological fields.
研究领域:
分析化学
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生物医学工程
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材料科学
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DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 110
·90570-90577
·
IF 3.84
Limin Liu,Xianfeng Zhang,Li Ji,Hanwen Li,Huijuan Yu,Fangjie Xu,Jianhua Hu,Dong Yang,Angang Dong
In the surface treatment of colloidal nanocrystals (NCs), S2− ions have been widely employed as metal-free atomic ligands to efficiently replace the original long hydrocarbon ligands. Prior studies exclusively show that S2− ions considerably quench the photoluminescence (PL) of semiconductor NCs (e.g., CdSe and PbS) during ligand exchange. Here we report that the influence of S2− treatment on the luminescent properties of CdSe NCs is highly dependent on the NC size. We observe an unexpected PL brightening phenomenon when small CdSe NCs (<4 nm) are subject to S2− treatment followed by incubation in the presence of air and light irradiation, whereas PL enhancement is not observed in large CdSe NCs (>4 nm) treated under the same conditions. Systematic characterization establishes the evolution of CdSe/CdS core–shell structures in small CdSe NCs arising from anion exchange between Se2− and S2−, which in conjunction with the subsequent incubation process accounts for the PL enhancement. Notably, 2.1 nm CdSe NCs treated with (NH4)2S exhibit a PL quantum yield (QY) as high as ∼40% after 2 days of incubation, which is comparable to that of conventional hydrophobic CdSe/CdS core–shell NCs synthesized at high temperatures. Our studies demonstrate that S2− ions can substantially substitute Se2− in small CdSe NCs in addition to replacing the surface-coating ligands, enabling highly luminescent, hydrophilic CdSe/CdS core–shell NCs at room temperature.
研究领域:
材料科学
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纳米技术
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光学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Yue Zhao,Mingya Wang,Junli Shi,Mingfeng Han,Yuqi Wu,Shengling Li,Linxiu Zhao,Duanlin Cao
In this paper, a fluorescent probe methyl( E )-2-(3-(benzo[ d ]thiazol-2-yl)-2‑hydroxy -5-methylbenzylidene) hydrazine-1-carboxylate ( DYH ) based on benzothiazole was designed and synthesized. The characterization involved NMR, HRMS, and crystal structure analysis. In case of the existence of other competing cations, the probe DYH showed high-affinity for Cu 2+ , and the resultant DYH Cu 2+ showed exceptional capacity to recognize S 2− in CH 3 CN/HEPES (7/3, v/v, HEPES 0.1 M, pH = 7.3). The detection limits of DYH for Cu 2+ and DYH Cu 2+ for S 2− were 0.56 μM and 0.67 μM, respectively. It was determined that the binding stoichiometry between the DYH and Cu 2+ , as well as DYH Cu 2+ and S 2− , was 1:1 according to the job's curve. The pH of the probe and complex was stable between 4 and 10. Colorimetric experiments of the probe DYH were conducted using test paper as a carrier. Additionally, DYH was used for fluorescence imaging of Cu 2+ and S 2− in Hela cells with poor cellular toxicity and good cell permeability.
研究领域:
分析化学
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生物医学
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DOI
高影响因子
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
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2022
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IF 5.168
Chunyuan Wu,Haikuan Dong,Gaoshen Su,Huan Yang,Xiaorong Yu
Free radical solution polymerization method was used to preparing copolymers (FAPAM, IAPAM, and MAPAM) by copolymerizing acrylamide (AM) with functional monomers fumaric acid (FA), itaconic acid (IA) and maleic anhydride (MAH) respectively. The basic parameters of the polymer were characterized by fourier transform infrared spectrometer (FTIR), proton nuclear magnetic resonance spectroscopy ( 1 HNMR), elemental analyzer and ubbelohde viscometer . In polymer flooding , the viscosity reduction effect of Fe 2+ and S 2− in formation water is more serious than that of inert cations, and they have greater impact on oil recovery. Therefore, this paper studied the influence of functional monomers on the structure of polymers and the influence on the resistance to Fe 2+ and S 2− properties of polymers through rheometer , gel permeation chromatography (GPC) and scanning electron microscope (SEM). The results revealed that the intra-chain or interchain forces can be increased to varying degrees by introducing different functional groups into the polymer molecular chains , as a result, the copolymer had different resistance to Fe 2+ and S 2− . In addition, the carboxyl groups on MAPAM chain were the most evenly distributed, its configuration was the most regular, and its resistance to Fe 2+ was the strongest. Relatively, the carboxyl groups on IAPAM macromolecular chain were evenly distributed on both sides of the main chain, and it had the strongest ability to resist S 2− . The results of GPC and SEM further proved that the copolymers had the ability to resist Fe 2+ and S 2− .
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2021
·Vol. 413
·期 30
·7473-7483
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IF 4.157
Zhao Huaqi,Jin Xilang,Zhou Hongwei,Yang Zheng,Bai Haiyan,Yang Jin,Li Yulong,Ma Yiting,She Mengyao
Glutathione and 2-aminopyridine are used as carbon sources to prepare carbon dots (CDs) by a one-step hydrothermal reaction. The results show that the average particle diameter of CDs is 8.64 nm with uniform size distribution and the fluorescence quantum yield is 13.62%. We further demonstrate that novel CDs possess highly selective sensing of Fe 3+ from 0.2 to 200 μM with a low detection limit (0.194 μM). Meanwhile, the fluorescence of CDs can be repeated many times by the addition of S 2− . Moreover, the CDs are used for biological imaging of living cells with well cell penetrability and low toxicity. Furthermore, it is successfully applied for anti-counterfeiting and information encryption. More interestingly, it can be doped with hydrogel and filter paper to prepare solid-phase sensors exhibiting high sensitivity and fast response, demonstrating their tremendous potential for the simple, rapid, and low-cost monitoring of Fe 3+ and S 2− . Graphical abstract
研究领域:
材料科学
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生物医学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
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IF 5.7
Linxiu Zhao,Junli Shi,Yongzheng Liu,Mingfeng Han,Shengling Li,Duanlin Cao
Background In recent years, environmental pollution has been increasing due to the excessive emission of toxic ions, which has caused serious harm to human health and ecological environment. There are various methods for detecting Cu 2+ , S 2− and Zn 2+ , but the traditional ion detection methods have obvious disadvantages, such as poor selectivity and long detection time. Therefore, it is still crucial to develop simple, efficient and rapid detection methods. Results A fluorescent probe based on benzothiazole, ( E )- N '-(3-(benzo[ d ]thiazol-2-yl)-2-hydroxy-5-methylbenzylidene)-3,4,5-tris(benzyloxy)benzohydrazide ( BT ), was designed and synthesized. It was characterized using ESI-MS, 1 H NMR, and 13 C NMR. BT can be used as a chemosensor to detect Cu 2+ , S 2− and Zn 2+ in CH 3 CN/H 2 O (7:3, v/v, pH = 7.4, HEPES buffer: 0.1 M), with detection limits of 0.301 μM, 0.017 μM, and 0.535 μM, respectively. At an excitation wavelength of 320 nm, BT exhibits an “on-off-on” response to Cu 2+ /S 2− and enhanced fluorescence response to Zn 2+ , with a change in fluorescence color from orange to green. The coordination ratio of ions to the probe was determined to be 1:1 through Job's plot and hydrogen spectral titration. The recognition mechanism was discussed in conjunction with theoretical calculations. Furthermore, the probe has been successfully used in test strips and medical swabs colorimetry, as well as live cell imaging. Significance The probe BT lays the foundation for the design and synthesis of multifunctional fluorescent probes. As a portable detection method, probe BT was used to detect Cu 2+ , S 2− and Zn 2+ on strips. Furthermore, the probe was applied to biological cells to detect target ions with low cytotoxicity and excellent cell permeability. This indicating that it can be used as a potential candidate for tracking Cu 2+ and S 2− in clinical diagnostics and biological systems.
研究领域:
分析化学
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生物医学
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环境科学
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产品关联
DOI
PubMed
高影响因子
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
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2020
·
IF 2.03
Lian Wang,Song Zhang,Ye Wang,Bing Zhang
Dibenzofuran (DBF) has attracted much attention from scientists recently since it is applied as a photoluminescence material and pharmaceutically active compound. Since the polychlorinated derivatives are highly toxic and manifest photostability in the environment. Femtosecond transient absorption spectroscopy associated with quantum chemical calculations are employed to investigate the ultrafast excited state dynamics of dibenzofuran from the S 2 state in 1,4-dioxane and ethanol, respectively. Following excitation at a wavelength of 266 nm, the S 2 state is firstly populated in the Franck–Condon region and preserves the planar molecular structure of the ground state. The observed increase of the transient absorption spectra of the excited state within the first several picoseconds indicates a geometry relaxation occurring on the S 2 potential energy surface. The subsequent kinetic traces of excited state absorption show that the S 2 state in the adiabatic region decays to the S 1 state through a fast internal conversion, followed by intersystem crossing to the T 1 state with a decay time of tens and hundreds of picoseconds in ethanol and 1,4-dioxane, respectively. Finally, the deactivation processes from the S 1 or T state are slow and take place on a time scale of about 20 ns.
研究领域:
化学
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光物理学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Haifeng Ru,Yanji Bao,Yifeng Wang,Xiaohong Wang,Jinchun Tu,Qiang Wu,Yi Li,Lei Ding
Direct seawater electrolysis offers a viable solution to the excessive consumption of fresh water resources in existing industrial electrolytic water processes. However, electrolysis efficiency and material stability are affected by electrode material corrosion caused by chlorine evolution reactions (CER) at the anode positions. In this study, the prepared S-Ni-MOF/Fe-MOF material exhibits an exceptional performance in the oxygen evolution reaction (OER) both in alkaline solution and seawater. Specifically, the material achieves low overpotentials of 281 and 279 mV in 1.0 M KOH and alkaline seawater at 100 mA cm −2 current density, and maintains stability for at least 100 h in both electrolyte solutions. The electronic structure of MOF-on-MOF was modulated through the introduction of S 2− , which induced a large number of vacancies. Furthermore, the reconstruction process on the material surface was accelerated by the formation of NiOOH and FeOOH, that served as protective layers and prevented the corrosion of the electrode material by Cl − , thereby enhancing its stability in seawater. Furthermore, computational studies have indicated that the Fe-Ni active sites at the heterointerface exhibit a synergistic effect, which has been confirmed by density functional theory (DFT) calculations. These results prove that this combination significantly reduces the energy barrier associated with the OER. Consequently, the reaction process is accelerated.
研究领域:
材料科学
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电化学
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计算化学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 8
·1-11
·
IF 5.7
Liao Linhong,Lin Xiao,Wang Kai,Hu Zhiyuan,Wu Fengshou
The preparation of nitrogen and sulfur co-doped carbon dots (N, S-CDs) with highly bright orange-red fluorescence is reported through a facile solvothermal approach with naphthalenetetracarboxylic dianhydride as starting material. The N, S-CDs exhibited superior properties, including intense long-wavelength emission with a narrow full width at half maxima (FWHM) of 33 nm, high fluorescence quantum yield (QY) of 60.5% in aqueous solution, excitation-independent emission behavior, and excellent water dispersibility. In addition, sulfide ions (S 2− ) could selectively recover the fluorescence of N, S-CDs quenched by Sn 2+ . The selective experiment suggested that the N, S-CDs/Sn 2+ complex could be used as a fluorescence-enhancement sensor for sulfide ions (S 2− ), with the linear range of 5–50 μM and the LOD of 0.35 μM. The practicality and feasibility of this sensor for the determination of sulfide ions in tap and lake water were verified with good recoveries. Furthermore, because of their highly bright fluorescence and strong water solubility, the N, S-CDs could be easily fabricated into fluorescent ink and transparent films, demonstrating the promising application in anti-counterfeiting. Therefore, the designed N, S-CDs exhibited the advantages of facile preparation, intense fluorescence, high stability, easy processing, and selective fluorescence change for specific analytes, which showed high potential in fluorescence detection and anti-counterfeiting. Graphical abstract
研究领域:
材料科学
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分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jing Feng,Sheng Yao,Xiaohan Mei,Jiacheng Xie,Xujie Wang,Huitian Zhi,Ruhui Shang,Yingchao Yang,Lei Hu,Zhengquan Yan
To conveniently monitor and remove toxic Hg 2+ and S 2− in food samples, Au Ag quantum-dot nanozyme (Au-Ag@FA QDs) was identified. The strong synergistic effect among folic acid (FA), Ag and Au endowed Au-Ag@FA QDs with superior peroxidase-mimic activity to accelerate 3,3′,5,5′-tetramethylbenzidine (TMB) redox with K m / V max of 0.28 mmol·L −1 /6.40 × 10 −8 mol·L −1 ·s −1 . Trace Hg 2+ or S 2− could selectively alter its peroxidase-like activity and inherent fluorescence performance, with obvious hyperchromic/“turn-on” fluorescent effect for Hg 2+ or hypochromic/“turn-off” one for S 2− . And red-green-blue (RGB) values analyzed from smartphones changed regularly with c Hg 2+ or c S 2− . Under the optimized conditions, Au-Ag@FA QDs were successfully applied for multi-mode UV–vis, fluorescent, and RGB monitoring of Hg 2+ or S 2− in food samples. The detection limits were 7.38 × 10 −7 /5.74 × 10 −8 /4.93 × 10 −6 g·L −1 and 1.99 × 10 −6 /4.48 × 10 −8 /5.79 × 10 −6 g·L −1 respectively. Importantly, over 93.8 % Hg 2+ or 90.5 % S 2− could be removed by simple centrifugal-separation after detection. The selective recognition mechanisms to Hg 2+ and S 2− were also proposed.
研究领域:
生物化学
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食品安全
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纳米技术
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 13
·10744
·
IF 5.6
Mingyue Hao,Minghui Wang,Danyu Zhao,Yong Shi,Ye Yuan,Junmei Li,Yunyi Zhai,Xiaofang Liu,Dong Zhou,Huatao Chen,Pengfei Lin,Keqiong Tang,Wei Liu,Yaping Jin,Aihua Wang
Brucella suis, the causative agent of brucellosis, poses a significant public health and animal husbandry threat. However, the role of the alanine racemase (alr) gene, which encodes alanine racemase inBrucella, remains unclear. Here, we analyzed analrdeletion mutant and a complemented strain ofBrucella suisS2. The knockout strain displayed an unaltered, smooth phenotype in acriflavine agglutination tests but lacked the core polysaccharide portion of lipopolysaccharide (LPS). Genes involved in the LPS synthesis were significantly upregulated in the deletion mutant. Thealrdeletion strain exhibited reduced intracellular viability in the macrophages, increased macrophage-mediated killing, and upregulation of the apoptosis markers. Bcl2, an anti-apoptotic protein, was downregulated, while the pro-apoptotic proteins, Bax, Caspase-9, and Caspase-3, were upregulated in the macrophages infected with the deletion strain. The infected macrophages showed increased mitochondrial membrane permeability, Cytochrome C release, and reactive oxygen species, activating the mitochondrial apoptosis pathway. These findings revealed that alanine racemase was dispensable inB. suisS2 but influenced the strain’s rough features and triggered the mitochondrial apoptosis pathway during macrophage invasion. The deletion of thealrgene reduced the intracellular survival and virulence. This study enhances our understanding of the molecular mechanism underlyingBrucella’s survival and virulence and, specifically, howalrgene affects host immune evasion by regulating bacterial LPS biosynthesis.Keywords:Brucella suisS2;alanine racemase;alr;lipopolysaccharide;apoptosis;mitochondrial membrane potential;intracellular survival
研究领域:
微生物学
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分子生物学
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传染病学
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免疫学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Li-Jun He,Zheng-Hui Qiu,Shuo-Qi Li,Hong Yan,Cun-Guo Lin,Rong-Chang Zeng
To mitigate the microbiologically influenced corrosion (MIC) of 70Cu-30Ni alloy induced by sulfate-reducing bacteria (SRB), a novel and intelligent antibacterial coating with controlled release properties was developed. The coating was constructed by incorporating S 2- -responsive nanocontainers into the epoxy coating. The nanocontainers were prepared by filling the hollow mesoporous silica nanoparticles (HMSNs) with triclosan (TCS), which served as an antibacterial agent, and the subsequent deposition of ZIF-7, acting as the S 2- -responsive gatekeeper. The synthesized nanocontainers were characterized using various techniques, including SEM, TEM, FT-IR, XRD, and XPS. Antibacterial tests against SRB were conducted to assess the antibacterial effect of nanocontainers. UV–vis experiments demonstrated that TCS could be triggered to release from the HMSNs-TCS@ZIF-7 nanocontainers in response to the attack of S 2- . The sustained release of TCS effectively inhibited the SRB adhesion and the released benzimidazole by the decomposition of ZIF-7 acted as corrosion inhibitors, thereby preventing SRB-induced MIC. This study would contribute to the development and design of intelligent responsive coatings with long-term MIC inhibition capabilities.
研究领域:
材料科学
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微生物学
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腐蚀与防护
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）