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Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and digital simulation techniques were used to investigate quantitatively the mechanism of electron transfer (ET) through densely packed and well-ordered self-assembled monolayers (SAMs) of 11-mercaptoundecanoic acid on gold, either pristine or modified by physically adsorbed glucose oxidase (GOx). In the presence of ferrocenylmethanol (FcMeOH) as a redox mediator, ET kinetics involving either solution-phase hydrophilic redox probes such as [Fe(CN) 6]3-/4- or surface-immobilized GOx is greatly accelerated: [Fe(CN)6]3-/4- undergoes diffusion-controlled ET, while the enzymatic electrochemical conversion of glucose to gluconolactone is efficiently sustained by FcMeOH. Analysis of the results, also including the digital simulation of CV and EIS data, showed the prevalence of an ET mechanism according to the so-called membrane model that comprises the permeation of the redox mediator within the SAM and the intermolecular ET to the redox probe located outside the monolayer. The analysis of the catalytic current generated at the GOx/SAM electrode in the presence of glucose and FcMeOH allowed the high surface protein coverage suggested by X-ray photoelectron spectroscopy (XPS) measurements to be confirmed.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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The invention discloses a method for synthesizing alpha – cyclic amine method, which comprises the following steps: in the reaction container, joins the alkone, the compound is mellow, iridium complex catalyst, tertiary amyl alcohol base and a solvent, the reaction mixture in the air reflux reaction, after the reaction to cool to room temperature, the solvent is removed by rotary evaporation, then through the column separation, to obtain the target compound. The invention uses an N? C? N ligand complex three tooth iridium, reaction only need to add 0.2 equivalent of carbonate, in the air, reaction only needs 10 – 12 hours, demonstrating the obvious advantages; therefore, the reaction in accordance with the requirement of green chemistry, has broad prospects of development. (by machine translation)

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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The electrochemical characteristics of bare and surface-modified screen-printed carbon electrodes (SPCEs) were compared using voltammetric responses of common redox probes to determine the potential role of nanomaterials in previously documented signal enhancement. SPCEs modified with gold nanoparticles (AuNPs) by layer-by-layer (LbL) electrostatic adsorption were previously reported to exhibit an increase in voltammetric signal for Fe(CN)6 3?/4? that corresponds to an improvement of 102% in electroactive surface area over bare SPCEs. AuNP-modified SPCEs prepared by the same LbL strategy using the polycation poly(diallyldimethylammonium chloride) (PDDA) here were found to provide no beneficial increase in electroactive surface area over bare SPCEs. Though similar improvement in voltammetric signal of Fe(CN)6 3?/4? was found for AuNP/PDDA-modified compared to bare SPCEs in these studies, results with other redox couples ferrocene methanol (FcMeOH/FcMeOH+) and Ru(NH3)6 3+/2+ indicated no difference between the electroactive surface areas of modified and bare SPCEs. Furthermore, gold present on AuNP/PDDA-modified SPCEs accounted for only 62 (±12)% of the electroactive surface area. The previously reported improvement in electroactive surface area that was attributed to the inclusion of AuNPs on the SPCE surface appears to have resulted from a misinterpretation of the non-ideal behavior of Fe(CN)63? as a redox probe for bare SPCEs.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. Electric Literature of 1273-86-5. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. Introducing a new discovery about 1273-86-5, Name is Ferrocenemethanol

Levels of reactive oxygen species (ROS) and reactive nitrogen species (RNS) in cells and cell redox balance are of great interest in live cells as they are correlated to several pathological and physiological conditions of living cells. ROS and RNS detection is limited due to their spatially restricted abundance: they are usually located in sub-cellular areas (e.g., in specific organelles) at low concentration. In this work, we will review and highlight the electrochemical approach to this bio-analytical issue. Combining electrochemical methods and miniaturization strategies, specific, highly sensitive, time, and spatially resolved measurements of cellular oxidative stress and redox balance analysis are possible. [Figure not available: see fulltext.].

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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The invention discloses a method for synthesis of alpha-alkyl ketone. In the reaction container, joins the alkone, the compound is mellow, iridium catalyst, tertiary amyl alcohol of alkali and solvent, the reaction mixture is reflux reaction in the air after a few hours, cooling to room temperature, rotary evaporation to remove the solvent, then through the column separation, to obtain a target compound. This invention uses a kind of metal-organic dual-function application, reaction only need to add 0.1 equivalent of a carbonate, is carried out in the air, reaction only needs 6 hours, demonstrating the obvious advantages; therefore, the reaction in accordance with the requirement of green chemistry, has broad prospects of development. (by machine translation)

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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Aims: H2O2 is produced by all eukaryotic cells under physiological and pathological conditions. Due to its enormous relevance for cell signaling at low concentrations and antipathogenic function at high concentrations, precise quantification of extracellular local hydrogen peroxide concentrations ([H2O2]) originating from single cells is required. Results: Using a scanning electrochemical microscope and bare platinum disk ultramicroelectrodes, we established sensitive long-term measurements of extracellular [H2O2] kinetics originating from single primary human monocytes (MCs) ex vivo. For the electrochemical techniques square wave voltammetry, cyclic and linear scan voltammetry, and chronoamperometry, detection limits for [H2O2] were determined to be 5, 50, and 500 nM, respectively. Following phorbol ester stimulation, local [H2O2] 5-8 mum above a single MC increased by 3.4 nM/s within the first 10 min before reaching a plateau. After extracellular addition of H2O2 to an unstimulated MC, the local [H2O2] decreased on average by 4.2 nM/s due to degradation processes of the cell. Using the scanning mode of the setup, we found that H2O2 is evenly distributed around the producing cell and can still be detected up to 30 mum away from the cell. The electrochemical single-cell measurements were validated in MC populations using electron spin resonance spectroscopy and the Amplex UltraRed assay. Innovation and Conclusion: We demonstrate a highly sensitive, spatially, and temporally resolved electrochemical approach to monitor dynamics of production and degradation processes for H2O2 separately. Local extracellular [H2O2] kinetics originating from single cells is quantified in real time.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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Low-cost disposable immunosensors were produced by covalent binding of Protein A or G on graphite-polystyrene screen-printed electrodes, and they were used in a fully automated flow-injection analysis (FIA) system, allowing the kinetics of IgG binding to Protein A or G to be improved by forced convection. The displacement of rabbit IgG bound to Protein A or G by mouse IgG isotypes (IgG1 or IgG(2a)) was studied. A FIA immunoassay of mouse IgG(2a) was performed at a Protein A-based immunosensor with a good sensibility (down to 0.02mugml-1) and a total assay time of 19min. It was shown that the immunosensor combines the advantages of being reusable for more than 30 assay cycles in flow-injection analysis, and disposable when necessary. Copyright (C) 2000 Elsevier Science B.V.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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CycloN2P2-Phos! The use of the multidentate phosphine, CycloN2P2-Phos (see graphic), which contains four heteroatoms (two nitrogen and two phosphorus atoms), in the palladium-catalyzed asymmetric allylic etherification (AAE) of alcohols and silanols leads to excellent levels of enantioselectivity (up to 99 %ee). Copyright

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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A series of ferrocene-based methylimidazolium receptors were prepared and their electrochemical properties of sensing the various anions, the dependence of alkyl chain length, were investigated by voltammetry technologies. All of these ferrocenylimidazolium compounds were fully characterized by elemental analysis, NMR and mass spectrometry. Moreover, the structures of ferrocene-based methylimidazolium receptors 1a, 1b, 2b, and 3b were confirmed by X-ray crystallography. The ferrocenylimidazolium 1a and 2a receptors in which the ferrocene center and methylimidazolium fragments are directly linked showed redox waves for both the ferrocenyl moiety and the methylimidazolium moiety and exhibited rather strong electrochemical sensing properties for F- anion.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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A native oxide film on the biphasic alloy Ti6Al4V was studied with scanning electrochemical microscopy (SECM). This alloy is commonly used for biomedical applications due to its biocompatibility and mechanical properties. The heterogeneously composed, n-semiconducting oxide film is of particular interest as biological systems are in contact only with these oxides and immunological rejection mechanisms may be connected to their electrochemical properties. Auger electron spectroscopy showed that the elemental composition of the oxide films on the alpha and Beta phase differ from each other. Approach curves were recorded above individual grains of the alpha phase in the feedback mode with several redox mediators. They were selected to cover a wide range of redox potentials for a better understanding of the surface kinetics of the oxide layer. The electron-transfer kinetics changed strongly depending on the redox potential of the mediator with respect to the energetic position of the bandgap of the oxide film. Predictions about the value of the flatband potential on an individual phase were derived from these experiments. Furthermore, SECM images were recorded to laterally resolve different electrochemical properties of the oxide film originating from the heterogeneous composition of the oxide on both phases.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion