SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Jianping Guan,Qin Tu,Long Chen,Mao-Sen Yuan,Jinyi Wang
Herein, we designed and synthesized a luminophor, Rh-F , which is an intergrant of rhodol and 2-hydroxy benzothiazole by introducing a benzothiazole unit onto the ortho-position of the phenolic hydroxy of rhodol. Rh-F exhibited excellent fluorescence properties such as a large Stokes shift (>180 nm) and the synergistic effect of aggregation-induced emission (AIE) and an excited state intramolecular proton transfer (ESIPT) feature. The AIE/ESIPT mechanism was thoroughly explored using X-ray single-crystal structures and photophysical determinations. Furthermore, Rh-F showed a sensitive fluorescence response to Fe 2+ with low detection limits of 115.2 nM and high selectivity. Studies of its sensing mechanism indicated that the Fe 2+ -induced blue-green fluorescence-quenched at 525 nm originates from an irreversible Fe 2 + chelate with the oxygen atom of the hydroxyl group and the N atom of the benzothiazole moiety. This blocked the ESIPT process of Rh-F which resulted in the quenching of the fluorescence sensor for Rh-F .
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 23
·22998-23008
·
IF 2.8
Zhao Junfeng,Wang Qun,Fu Yongsheng,Peng Bo,Zhou Gaofeng
In this study, the effect of Fe 3+ , Fe 2+ , and Mn 2+ dose, solution pH, reaction temperature, background water matrix (i.e., inorganic anions, cations, and natural organic matters (NOM)), and the kinetics and mechanism for the reaction system of Fe(VI)/Fe 3+ , Fe(VI)/Fe 2+ , and Fe(VI)/Mn 2+ were investigated systematically. Traces of Fe 3+ , Fe 2+ , and Mn 2+ promoted the DCF removal by Fe(VI) significantly. The pseudo-first-order rate constant ( k obs ) of DCF increased with decreasing pH (9–6) and increasing temperature (10–30 °C) due to the gradually reduced stability and enhanced reactivity of Fe(VI). Cu 2+ and Zn 2+ ions evidently improved the DCF removal, while CO 3 2− restrained it. Besides, SO 4 2− , Cl − , NO 3 − , Mg 2+ , and Ca 2+ almost had no influence on the degradation of DCF by Fe(VI)/Fe 3+ , Fe(VI)/Fe 2+ , and Fe(VI)/Mn 2+ within the tested concentration. The addition of 5 or 20 mg L −1 NOM decreased the removal efficiency of DCF. Moreover, Fe 2 O 3 and Fe(OH) 3 , the by-products of Fe(VI), slightly inhibited the DCF removal, while α-FeOOH, another by-product of Fe(VI), showed no influence at pH 7. In addition, MnO 2 and MnO 4 − , the by-products of Mn 2+ , enhanced the DCF degradation due to catalysis and superposition of oxidation capacity, respectively. This study indicates that Fe 3+ and Fe 2+ promoted the DCF removal mainly via the self-catalysis for Fe(VI), and meanwhile, the catalysis of Mn 2+ and the effect of its by-products (i.e., MnO 2 and MnO 4 − ) contributed synchronously for DCF degradation.
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研究领域:
环境科学
·
化学动力学
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产品关联
DOI
PubMed
高影响因子
ECS Electrochemistry Letters
·
2015
·Vol. 4
·期 3
·A29
·
IF 1.789
VanTu Nguyen,YueLi Liu,Xue Yang,Wen Chen
The precursor of Fe2(MoO4)3 has been synthesized by precipitation method, which is used to prepare high-capacity cathode material Fe2(MoO4)3/nanosilver composite for sodium-ion batteries. The silver modifying does not affect the monoclinic structure of Fe2(MoO4)3 but improves its kinetics in terms of discharge capacity and rate capability. AC impedance measurements show that the Ag modification decreases the charge transfer resistance of Fe2(MoO4)3/nanosilver composite cathodes. Electrochemical studies confirm that the Fe2(MoO4)3/nanosilver composite exhibits capacity of 90 mAhg−1, and retains 84.5 % of capacity even after 50 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Chaochao Jiang,Caihong Qin,Mengke Guo,Jiayu Huang,Dongjie Yan,Xiaoqing Dang
A non-thermal plasma with a wet scrubber (NTP + WS) was used to degrade gaseous toluene. Compared with the NTP + WS/H 2 O system, the toluene and by-product ozone removal efficiencies were increased by 10% and 85% in the NTP + WS/Fe 2+ system, respectively. For 60 ppm toluene degradation, the maximum mineralization rate (MR) of toluene (61%) was obtained, at the optimum Fe 2+ concentration of 50 mg/L. During catalytic oxidation, the removal efficiency of toluene was limited by its solubility in WS systems. In addition, decreased Fe 2+ concentration and accumulation of organics led to the system deactivation. The EPR and quenching experiments verified the presence and contribution of hydroxyl radicals (4.6%) and superoxide radicals (3.8%) to the removal efficiency of toluene. Based on the radicals and intermediates detected in the gas and liquid phases, a degradation mechanism for toluene in the NTP + WS/Fe 2+ system was proposed.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FERROELECTRICS
·
2022
·
IF 0.695
Qiang Shen,Songyuan Mao,Yubin Zhou,Yuheng Xie,Peisong Tang
Fe3+ modified bentonite was firstly prepared by ion change method and Fe2+ modified bentonite was then synthesized by reduction of Fe3+-bentonite. The modified bentonites were characterized with XRD and SEM. The adsorption ability of Tetracycline (TC) of Fe3+-bentonite and Fe2+-bentonite was compared with raw bentonite. The catalytic activity of two Fe-bentonites used as heterogeneous Fenton catalyst are also examined. The resulted shows that both of Fe3+-bentonite and Fe2+-bentonite exhibited superior removal performance of TC. The removal capacities of Fe3+-bentonite and Fe2+-bentonite in the 400 mg/L TC solution reached 98.15% and 96.55%, respectively. The Fe3+-bentonite and Fe2+-bentonite remains 75% removal abilities after 3 rounds under Fenton condition. The mechanisms of adsorption and Fenton degradation of Fe modified bentonite were also discussed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Jia Wang,Deyue Yan,Wei Huang
A fluorescence metal-organic framework [Zn 3 (APT) 4 ]·2H 2 O (Zn-APT) was synthesized from Zn(NO 3 ) 2 ·6H 2 O and 2-amino-6-purinethiol (ATP) by the solvothermal reaction. Zn-APT has a novel compact structure with a nbo topology type. The analyses of single-crystal diffraction reveal that Zn-APT crystallizes in a cubic crystal system and F d 3 ¯ c space group. Based on a large amount of π-conjugated organic ligands of ATP and d 10 metal center of Zn 2+ , Zn-APT can emit strong luminescence. It can be used as a fluorescent probe to detect Fe 3+ ion effectively. The detection limit is 0.28 μM and K sv (quenching efficiency) is 2.1 × 10 4 M −1 . In addition, Zn-APT can adsorb hemoporphyrin dihydrochloride to produce a red-brown crystal Zn-APT-PH. Interestingly, it can also be used to detect Fe 2+ ion efficiently with the detection limit of 0.12 μM and K sv of 1.9 × 10 4 M −1 .
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2019
·
IF 1.267
Kai Sun,Shun-Yao Li,Hui-Ling Chen,Qing-Guo Huang,Youbin Si
In this study, we used a simple and rapid colourimetric reaction for visual sensing of Fe2+ and Pb2+ ions in water by employing nano-MnO2 as a natural oxidase mimic to respectively catalyse ABTS and TMB in citrate-phosphate buffer solution (C-PBS) at 25°C and pH 3.8. It was found that nano-MnO2 possessed highly oxidase-mimicking activity with the Km values of 0.030 and 0.027 toward ABTS and TMB, respectively, indicating TMB had a stronger affinity on nano-MnO2 than ABTS. Interestingly, the presence of 0.01 mmol·L−1 Fe2+/Pb2+ ion was able to significantly down-regulate the activity of MnO2 nanozyme in nano-MnO2-mediated ABTS reaction processes (P < 0.01), which mainly due to the strong adsorption of metal ion toward nano-MnO2 surface via the electrostatic attractions, thus leading to the passivation and inactivation of MnO2 nanozyme catalytic activity. Thereinto, Fe2+ reacted with multivalent manganese by oxidation-reduction, while Pb2+ was specifically adsorbed onto the surface of MnO2 nanozyme and formed complexes. Notably, only Fe2+ ion inhibited the activity of MnO2 nanozyme-TMB with a detection limit as low as 1.0 μmol·L−1. In MnO2 nanozyme-ABTS sensing systems, Fe2+ and Pb2+ ions detection limit of 0.5 and 2.0 μmol·L−1 were, respectively, achieved with a linear response range of 0–0.02 and 0–0.8 mmol·L−1, implying the developed MnO2 nanozyme-ABTS sensor was potentially applicable for the visual determination of Fe2+ and Pb2+ ions in water. In the real water samples, MnO2 nanozyme-ABTS achieved high accuracy (relative errors: 3.4‒10.5%) and recovery (96‒110%) for respective detection of Fe2+ and Pb2+ ions. The simple and rapid MnO2 nanozyme-ABTS sensing systems might provide a practical assay for visual detection of Fe2+ and Pb2+ ions in the environmental water samples.
研究领域:
分析化学
·
环境科学
·
生物催化
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Xiaoyu Zhang,Qinqin Ma,Xinfang Liu,Huawei Niu,Lei Luo,Rongfang Li,Xun Feng
A new europium metal–organic framework ( Eu-MOF ) was prepared by simple hydrothermal method . The product exhibited intense red fluorescence, long fluorescence lifetime (0.454 ms) and excellent fluorescence stability. The fluorescence titration result showed that Fe 3+ could completely quench the fluorescence of Eu-MOF , while the fluorescence quenching effect of Fe 2+ or bromate was negligible. Considering the strong oxidizing property of bromate, a “turn off” Eu-MOF@Fe 2+ sensor toward bromate was designed by generating Fe 3+ due to the redox reaction . The results showed that the sensor displayed a wide linear range (0–0.2 mM), high sensitivity (LOD = 3.7 × 10 −6 mol/L), good selectivity and resistant to possible interferences in real four sample. Furthermore, the detection mechanism was investigated by PXRD, XPS and UV–Vis methods. More importantly, the Eu-MOF@Fe 2+ sensor was further applied to detect bromate in wheat flour with satisfactory recovery (95.30%−104.38%) and accuracy (RSD < 2.85%). These results suggest that Eu-MOF@Fe 2+ can be used as a potential sensor to detect bromate in food industry.
研究领域:
分析化学
·
食品安全
✓ 已验证
DOI
高影响因子
Microsystems & Nanoengineering
·
2025
·Vol. 11
·期 1
·1-10
·
IF 9.9
Ma Yanmei,Li Xinhao,Hu Weikang,Ruan Muyang,Yang Ming,Chang Lingqian,Gu Hongri,Hu Chengzhi
Ferroptosis is an iron-dependent form of regulated cell death driven by phospholipid peroxidation and the accumulation of reactive oxygen species (ROS), holding significant importance for therapeutic applications via its induction or inhibition. Accurate detection of intracellular Fe 2+ and ROS is essential, as these molecules play essential roles in initiating and propagating ferroptosis. In this study, we present a novel electrochemical nanoprobe for real-time, highly selective detection of intracellular Fe 2+ . The nanoprobes are prepared by coating gold nanoparticles (AuNPs) and poly(3,4-ethylenedioxythiophene) (PEDOT) onto silicon carbide nanowires (SiC NWs), which are subsequently functionalized with ferrocenyl endoperoxide carboxylic acid (FDCA) and integrated with a liquid metal-filled glass nanopipette. FDCA is specifically synthesized to enable precise electrochemical detection of Fe 2+ with high selectivity (0.1 nM to 1 µM) and exceptional specificity. PEDOT and AuNPs can improve electrical conductivity and provide a versatile interface for further FDCA decoration. We use the nanoprobes to evaluate the intracellular change of Fe 2+ in MCF-7 breast cancer cells during erastin-induced ferroptosis. We observe a significant increase in intracellular Fe 2+ levels in MCF-7 cells undergoing ferroptosis, accompanied by a notable rise in ROS levels. These findings underscore the potential of this nanoprobe to enhance our understanding of the mechanism of ferroptosis in tumor development and as a potential treatment target.
研究领域:
生物化学
·
细胞生物学
·
肿瘤学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2020
·Vol. 37
·期 4
·597-603
·
IF 2.69
Chen Shuai,Zhou Wei,Liu Mingjun,Zhao Guangbo,Cao Qingxi,Zhao Bojun,Kou Kaikai,Gao Jihui
Oxidation of coal under mild conditions is effective not only to understand the macromolecular network structure of coal but also to produce useful chemicals, allowing more efficient application of coal resources. In this work, the mild oxidation of Zhundong subbituminous coal (ZS) by Fe 2+ /H 2 O 2 system was carried out under various conditions, including [Fe 2+ ]/[H 2 O 2 ] molar ratio, temperature, H 2 O 2 concentration and oxidation time. The liquid oxidation products were analyzed using gas chromatography/mass spectrometry (GC/MS), and the chemical structure changes were studied using Fourier transform infrared spectroscopy (FTIR). The results suggest that the oxidation efficiency of ZS with H 2 O 2 is enhanced with the aid of Fe 2+ . The optimum conditions were determined to be [Fe 2+ ]/[H 2 O 2 ] molar ratio of 0.00453, H 2 O 2 concentration of 3mol/L, 60 oC and 4 h according to the oxidation conversion rate. In total, 25 compounds were identified, which could be categorized as six group components. Most of them are valuedadded chemicals, and the content of benzene carboxylic acids is the highest among them, making up 29.99% of all group components in total relative content (TRC). -CH 2 - should be primary bridge connecting the aromatic rings, and alkylene chains linking three aromatic rings are abundant in ZS.
研究领域:
煤炭化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2020
·Vol. 145
·期 6
·2357-2366
·
IF 3.978
Shanshan Wei,Lihong Tan,Xiangyu Yin,Ruoming Wang,Xueru Shan,Qian Chen,Tinghua Li,Xinyu Zhang,Chunzhu Jiang,Guoying Sun
Fe2+ is a trace metal ion required by the human body, and its abnormal metabolism can cause serious diseases. Herein, we report the development of a highly efficient “ON–OFF” fluorescent probe based on carbon dots (CDs), prepared by a simple one-step hydrothermal method. The CDs exhibited exceptional water dispersibility and stability, superior luminescence performance and low cytotoxicity. The fluorescence could be efficiently quenched by Fe2+ through an electronic transfer process. And under the optimized experimental conditions, this probe shows excellent selectivity and high sensitivity towards Fe2+ with a detection limit of 51 nmol. More interestingly, this probe could realize the visual detection of Fe2+ when Fe3+ and Cu2+ ions were efficiently shielded by tartaric acid in the presence of ascorbic acid. Furthermore, the developed fluorescent probe has been successfully applied for the detection of Fe2+ in tap water and BSA solution as well as for the biosensing of Fe2+ in living cells.
研究领域:
生物化学
·
分析化学
·
医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Arabian Journal of Chemistry
·
2024
·
IF 5.3
Xiaohui Sun,Wei Li,Zijun Dong,Yunhe Hou,Yuyang Ning,Chenyu Wang,Guo Lv
During the COVID-19 pandemic, the extensive use of ribavirin (RBV) raised concerns about its environmental residues and associated risks, necessitating remedial actions. This study investigates the degradation efficiency, mechanism, and biotoxicity of RBV using ferrous (Fe 2+ ) activated persulfate (PS) advanced oxidation technology (Fe 2+ /PS oxidation). Experiments conducted under various conditions revealed that at pH = 3, PS concentration of 4 mM, PS/Fe 2+ molar ratio of 2:1, and citric acid of 0.5 mM with Fe 2+ added twice, the degradation rate of RBV reached 98.70 %. The degradation process of RBV by Fe 2+ /PS from 0 to 5 mins followed a first-order reaction kinetics model. The presence of halide ions (Cl - , Br - , I - ) was found to inhibit the degradation efficiency. The active species involved were identified as SO 4 - ·, ·OH, 1 O 2 , and FeO 2+ , with SO 4 - · and ·OH being the most significant. Moreover, the products of ribavirin were determined and their degradation pathways were proposed. Dehydration, deamidation, C-N bond breaking and hydroxylation were the major pathways. Additionally, toxicity assessment showed that Fe 2+ /PS oxidation reduced the inhibition rate of bioluminescence in Vibrio fischeri from 31.58 % to 3.88 %, effectively controlling RBV toxicity during the reaction. This study provides insights into managing water environmental risks associated with pharmaceutical residues in the post-pandemic era.
研究领域:
环境科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）