Synthesis and characterization of nano−zinc wire using a self designed unit galvanic cell in aqueous medium and its reactivity in propargylation of aldehydes

Mondal, Bittagopal; Mandal, S. P.; Kundu, Mousumi; Adhikari, Utpal; Roy, Uttam Kumar

doi:10.1016/j.tet.2019.07.012

Cited by 7 publications

(2 citation statements)

References 56 publications

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“…No other peaks associated with impurities were observed, indicating that high-purity ZnO nanoparticles were obtained. However, the diffraction peaks corresponding to (101) and (102) planes, which match with that of pure metallic Zn [ 30 ], were observed after increasing the zinc source temperature from 420 to 470 °C ( Figure 5 c). This means that there was an excess of Zn in this sample.…”

Section: Resultsmentioning

confidence: 87%

Influence of Temperature Parameters on Morphological Characteristics of Plasma Deposited Zinc Oxide Nanoparticles

et al. 2022

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Zinc oxide nanoparticles were obtained by plasma-enhanced chemical vapor deposition (PECVD) under optical emission spectrometry control from elemental high-purity zinc in a zinc–oxygen–hydrogen plasma-forming gas mixture with varying deposition parameters: a zinc source temperature, and a reactor temperature in a deposition zone. The size and morphological parameters of the zinc oxide nanopowders, structural properties, and homogeneity were studied. The study was carried out with use of methods such as scanning electron microscopy, X-ray structural analysis, and Raman spectroscopy, as well as statistical methods for processing and analyzing experimental data. It was established that to obtain zinc oxide nanoparticles with a given size and morphological characteristics using PECVD, it is necessary (1) to increase the zinc source temperature to synthesize more elongated structures in one direction (and vice versa), and (2) to decrease the reactor temperature in the deposition zone to reduce the transverse size of the deposited structures (and vice versa), taking into account that at relatively low temperatures instead of powder structures, films can form.

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Section: Resultsmentioning

confidence: 87%

Influence of Temperature Parameters on Morphological Characteristics of Plasma Deposited Zinc Oxide Nanoparticles

et al. 2022

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“…The reduction reaction occurs in copper which has a higher potential while the oxidation reaction occurs in zinc which has a lower potential. Copper has a cell potential of E 0 cell = 0.34 volts and zinc has a cell potential of E 0 cell = -0.76 volts (Lacina et al, 2019;Mondal et al, 2019). As a result, the potential difference in the galvanic cell generated by the zinc and copper electrodes theoretically is 1.10 volt (Cek, 2018;Gunawan et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

Characteristic of Ceremai Fruit Electrical Properties as Electrolyte Solution in Galvanic Cells

Meiliyadi¹,

Damayanti²,

Syuzita³

2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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It has been conducted a research to analyze ceremai fruit (Phyllanthus acidus) as an electrolyte solution for galvanic cells. The materials used consisted of copper (Cu), zinc (Zn) electrodes and an electrolyte solution from ceremai fruit. Electrolyte solution with a concentration variation of 60 to 100% was obtained from pure ceremai fruit electrolyte solution mixed with aquades. In addition, the electrolyte solution is fermented in a period of 1 to 5 days. The variables measured were pH, voltage, electric current and electric power. Based on the data analysis, it was found that the value of the acidity level was proportional to the concentration where at 100% solution concentration the pH value was 4.8 and at 60% the pH value was 5.4. The greatest voltage is 1 volt that obtained when the solution is in the most acidic state or highest concentration. It is found that the greater the concentration of the solution, the smaller the pH value (the acidity level increases) the value of the voltage, current and power will increase. However, when the electrolyte solution is fermented, it appears that the pH value is inversely proportional to the voltage generated. The longer of fermentation time, the pH value will increase but the voltage value will decrease. When the electrolyte solution is fresh, the pH value is 4.8 with a voltage of 1 volt, but on the 5th day of fermentation the acidity level increases with pH value of 2.15 but the voltage decreases to 0.65 volts. This is caused by oxygen exposure at the time of measurement so that the oxygen in the solution will increase. An increase of oxygen will reduce the density of electrically charged ions so that the current will decreases and the voltage will also decrease.

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Electroreductive Cross‐Electrophile Coupling of Aromatic Carbonyl Compounds and Alkyl Bromides

Li,

Wang,

Chen

et al. 2024

Adv Synth Catal

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Classical methods for the synthesis of tertiary alcohols mainly rely on the nucleophilic addition of organometallic reagents to carbonyl compounds. Here, we disclose a strategy for synthesizing tertiary alcohols via electroreductive cross‐electrophile coupling of aromatic carbonyl compounds and alkyl bromides (allyl, propargyl, benzyl and cyclohexyl bromides). This procedure features good substrate tolerance and friendly conditions (undivided cell, cheap and reusable carbon electrodes, reaction in open air, room temperature, without any external transition metal/activating reagent). Using this method, 32 desired products can be obtained with moderate to good yields, and gram‐scale synthesis is feasible, demonstrating the practicality of this approach.

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Synthesis and characterization of nano−zinc wire using a self designed unit galvanic cell in aqueous medium and its reactivity in propargylation of aldehydes

Cited by 7 publications

References 56 publications

Influence of Temperature Parameters on Morphological Characteristics of Plasma Deposited Zinc Oxide Nanoparticles

Influence of Temperature Parameters on Morphological Characteristics of Plasma Deposited Zinc Oxide Nanoparticles

Characteristic of Ceremai Fruit Electrical Properties as Electrolyte Solution in Galvanic Cells

Electroreductive Cross‐Electrophile Coupling of Aromatic Carbonyl Compounds and Alkyl Bromides

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