Voltammetric studies of the electrochemical behaviour of salicylidene-2-aminopyridine at a hanging-mercury-drop-electrode

1986 ◽  
Vol 64 (4) ◽  
pp. 702-705 ◽  
Author(s):  
Refat Abdel-Hamid
Keyword(s):  
Chemical Reaction ◽  
Electrochemical Behaviour ◽  
Order Rate Constant ◽  
Potential Sweep ◽  
Cyclic Voltammetric ◽  
Diffusion Controlled ◽  
Voltammetric Characteristics ◽  
Irreversible Chemical Reaction ◽  
Voltammetric Studies ◽  
Tetraethylammonium Perchlorate

Electrochemical behaviour of salicylidene-2-aminopyridine has been investigated in 0.1 M tetraethylammonium perchlorate–dimethylformamide solutions by cyclic voltammetric and convolution potential sweep voltammetric methods. It was found that the depolarizer exhibits two well-defined diffusion-controlled irreversible one-electron waves. The cyclic voltammetric characteristics and the convolution, deconvolution, and logarithmic convolution analyses reveal that salicylidene-2-aminopyridine in such conditions follows a set of two one-electron transfer reactions each followed by an irreversible chemical reaction. The values of the first-order rate constant of the irreversible chemical reaction and E1/2 were computed.

Cyclic voltammetric studies. II. Substituted anilines in acetonitrile

1974 ◽  
Vol 27 (11) ◽  
pp. 2495 ◽  
Author(s):  
M Mohammad ◽  
AY Khan ◽  
M Afzal ◽  
A Nisa ◽  
R Ahmed
Keyword(s):  
Charge Transfer ◽  
Chemical Reaction ◽  
Substituted Anilines ◽  
Cyclic Voltammetric ◽  
Triangular Wave ◽  
Irreversible Chemical Reaction ◽  
Multistep Process ◽  
Voltammetric Studies ◽  
Cyclic Voltammetric Studies

Results of single sweep triangular wave cyclic voltammetric studies on some substituted anilines in acetonitrile are reported. It has been found that, while the first reduction steps of nitroanilines are reversible that of chloroaniline is irreversible. The second reduction steps were found to be irreversible and the overall picture emerged of a multistep process involving reversible charge-transfer steps followed by an irreversible chemical reaction.

A Novel Non-Metal Oxygen Reduction Electrocatalyst Based on Platelet Carbon Nanofiber

2010 ◽  
Vol 132 ◽  
pp. 264-270
Author(s):  
Jun Sheng Zheng ◽  
Xin Sheng Zhang ◽  
Sun Wen ◽  
Ping Li ◽  
Chun An Ma ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Carbon Nanofiber ◽  
Reduction Reaction ◽  
Cyclic Voltammetric ◽  
Spectra Analysis ◽  
Transmission Electron ◽  
Diffusion Controlled ◽  
Reduction Current ◽  
Voltammetric Studies ◽  
Cyclic Voltammetric Studies

A novel non-metal electrocatalyst based on platelet carbon nanofiber (p-CNF) is prepared, and a palladium electrocatalyst supported on activated carbon (AC) is also synthesized. The physico-chemistry properties of the p-CNF and palladium catalyst on AC (Pd/AC) are investigated by high resolution transmission electron microscopy, N2 physisorption and Raman spectra analysis. From cyclic voltammetric studies, it is found that p-CNF is more active than Pd/AC in acidic media. The p-CNF shows a more positive oxygen reduction reaction (ORR) onset reduction potential and a higher oxygen reduction current density than Pd/AC. Moreover, the ORR is controlled by a surface reaction process when Pd/AC is used, while it becomes diffusion controlled when p-CNF is used.

Electrochemical studies of amine salts of monothiocarbamates

1982 ◽  
Vol 35 (12) ◽  
pp. 2465
Author(s):  
RJ Magee ◽  
B Annuar
Keyword(s):  
Electrochemical Behaviour ◽  
Mercury Electrode ◽  
Compact Layer ◽  
Cyclic Voltammetric ◽  
Reactive Material ◽  
Anodic Wave ◽  
Diffusion Controlled ◽  
Controlled Potential ◽  
Controlled Potential Coulometry ◽  
Amine Salts

The electrochemical behaviour of the amine salts of morpholyl-, pyrrolidyl-�and piperidyl-mono- thiocarbamates (morpholinium morpholine-4-carbothioate, piperidinium piperidine-1-carbothioate and pyrrolidinium pyrrolidine-1-carbothioate) at the mercury electrode has been studied by means of d.c. polarography and cyclic voltammetry. All three exhibited a well defined anodic wave, but the pyrrolidyl derivative (pymtc) gave an additional wave. The main wave in each case was found to be diffusion-controlled. Temperature coefficients showed erratic behaviour at higher temperatures which was thought to be due to decreasing availability of reactive material because of decomposition. Controlled potential coulometry gave n = 1 per mole for the main wave of each compound. The behaviour was similar to that of the dithiocarbamate ligands under the same conditions and the small pre-wave in the polarograms of pymtc is attributed to the formation of a mercuric pyrrolidyl monothiocarbamate, which, unlike the mercuric complex of the other two ligands is structurally ordered and able to form a compact layer with the electrode. Cyclic voltammetric results supported the findings of polarography and confirmed the following mechanism: mtc- + Hg → Hg(mtc) + e' (1) 2Hg(mtc) → Hg(mtc)2 + Hg (2)

Synthesis, crystal structure and electrochemical behaviour of water soluble Schiff bases

2005 ◽  
Vol 220 (7) ◽  
Author(s):  
Leyla Tatar ◽  
Hasan Nazır ◽  
Mine Gümüşer ◽  
Cansen Kale ◽  
Orhan Atakol
Keyword(s):  
Crystal Structure ◽  
Ir Spectroscopy ◽  
Schiff Bases ◽  
Electrochemical Behaviour ◽  
Water Soluble ◽  
X Ray Diffraction ◽  
Cyclic Voltammetric ◽  
X Ray ◽  
Voltammetric Studies ◽  
Cyclic Voltammetric Studies

AbstractFour water soluble Schiff bases were prepared from the reaction of salicylaldehyde and 2-hydroxy-1-naphtaldehyde with 2-amino-2-methyl-1,3-dihydroxy propane and 2-amino-2-methoxy-1,3-dihydroxy propane. Two of the Schiff bases were characterized using elemental analysis, IR spectroscopy and single crystal X-ray diffraction. In addition cyclic voltammetric studies were performed. The Schiff bases C

scholarly journals Cyclic Voltammetric Studies of Biologically Active Azomethine 2’-Hydroxyacetophenone Sulfamethoxazole

2019 ◽  
Vol 35 (3) ◽  
pp. 1117-1124
Author(s):  
Gopal Lal Kumawat ◽  
Preeti Choudhary ◽  
Anil Kumar Varshney ◽  
Sarita Varshney
Keyword(s):  
Biologically Active ◽  
Cyclic Voltammograms ◽  
Cyclic Voltammetric ◽  
Azomethine Group ◽  
Diffusion Controlled ◽  
Voltammetric Behavior ◽  
Voltammetric Studies ◽  
Bacteria And Fungi ◽  
Ph Range ◽  
Cyclic Voltammetric Studies

The cyclic voltammetric behavior of newly synthesized biologically active azomethine 2’-hydroxyacetophenone sulfamethoxazole (2’-HyAcPhSM) was examined at glassy carbon electrode in acetonitrile, acetone, methanol and DMF solvents using phosphate buffer and Britton-Robinson (BR) buffer. The effect of solvents, buffers, sweep rates and pH were calculated on peak potential and peak current. The cyclic voltammograms of 2’-HyAcPhSM exhibited two electronic, irreversible and diffusion-controlled single cathodic peak within the entire pH range which is attributed to the reduction of the azomethine group (‒CH=N‒) to amine group (‒CH2‒NH‒). The biological activity of synthesized 2’-HyAcPhSM compound were carried out against various bacteria and fungi.

scholarly journals Electrochemical Behaviour of N′-(p-toluenesulphonyl)-3-methyl-4-(4′-substituted arylhydrazono) pyrazolin-5-ones

2012 ◽  
Vol 9 (4) ◽  
pp. 1864-1874
Author(s):  
V. Nagaraju ◽  
R. Sreenivasulu ◽  
P. Venkata Ramana
Keyword(s):  
Electrochemical Behaviour ◽  
Reduction Process ◽  
Effect Of Solvent ◽  
Buffer Solutions ◽  
Diffusion Controlled ◽  
Controlled Potential Electrolysis ◽  
Dc Polarography ◽  
Controlled Potential ◽  
Ph Range ◽  
And Diffusion

The electrochemical behaviour of N′-(p-toluenesulphonyl)-3-methyl-4-(4′-substituted arylhydrazono) pyrazolin-5-ones has been investigated at dme and gc electrodes in buffer solutions of pH 2.0, 4.0, 6.0, 8.0 and 10.0 using dc polarography and cyclic voltammetry and coulometry. The compounds exhibit one well defined wave in the entire pH range of study. The process is irreversible and diffusion controlled. Controlled potential electrolysis indicates the involvement of four electrons in the reduction process. The effect of solvent, cations and anions, temperature and substitutents on the mechanism of reduction has been studied. Based on the results obtained the mechanism of reduction has been suggested.

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