scholarly journals Electrochemical Studies of Betti Base and Its Copper(II) Complex by Cyclic and Elimination Voltammetry

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Shardul Bhatt ◽  
Bhavna Trivedi
Keyword(s):  
Electron Transfer ◽  
Surface Reaction ◽  
Reference Electrode ◽  
Chemical Oxidation ◽  
Electrochemical Studies ◽  
Cyclic Voltammetric ◽  
Betti Base ◽  
Iminium Ion ◽  
Voltammetric Studies ◽  
Cyclic Voltammetric Studies

The electrochemical behavior of Betti base 1-(α-amino benzyl)-2-naphthol (BB) and its copper(II) complex by cyclic and elimination voltammetry (EVLS) is reported in the present study. The cyclic voltammetric studies carried out at a glassy carbon working electrode, Ag/Ag+reference electrode (0.01 M AgNO3in acetonitrile) in DCM at 100 mV/sec, 200 mV/sec, and 400 mV/sec scan rates indicated a preceding chemical oxidation of the adsorbed BB species to form an iminium ion followed by formation of a carbanion via two-step quasireversible reduction. The suggested reaction mechanism has been supported by the elimination voltammetry. The CV and EVLS studies revealed Cu(II)BB complex to undergo a chemical or a surface reaction before electron transfer from the electrode at −0.49 V to form Cu(I)BB species. The oxidation of Cu(I)BB species has been observed to be CV silent.

Electron transfer reactions. Reaction of nitrones with potassium

1987 ◽  
Vol 65 (9) ◽  
pp. 2039-2049 ◽  
Author(s):  
Konda Ashok ◽  
Pallikkaparambil M. Scaria ◽  
Prashant V. Kamat ◽  
Manapurathu V. George
Keyword(s):  
Electron Transfer ◽  
Transfer Reactions ◽  
Radical Anions ◽  
Cyclic Voltammetric ◽  
Electron Transfer Reactions ◽  
Reduction Potentials ◽  
Dimeric Product ◽  
Voltammetric Studies ◽  
Electron Transfer Processes ◽  
Cyclic Voltammetric Studies

Treatment of nitrones (1a–d, 26a,b, 34, 49) with potassium in tetrahydrofuran (THF) gives rise to radical anion (2a–d, 27a,b, 35, 50) and dianion intermediates (3a–d, 28a,b, 36) through electron transfer reactions. These intermediates undergo further transformations to give a variety of products. Thus, the aldehydonitrones (1a–d) give the corresponding aldehydes (10a–c), carboxylic acids (25a–c), and azobenzenes (19a,d), whereas the ketonitrones (26a,b) give deoxygenation products (31a,b). The nitrone 34 gave a mixture of products consisting of benzoic acid (25a), dibenzyl (48), the dimeric product 38, and tetraphenylpyrazine (46), whereas 49 did not give any isolable product. Cyclic voltammetric studies have been employed to measure the reduction potentials for both one-electron and two-electron transfer processes, leading to the radical anions and dianions respectively. These intermediates have been characterized through their electronic spectra and they were quenched by oxygen. Pulse radiolysis of the nitrones 1a–d, 26a,b, 34, and 49 also gave the corresponding radical anions 2a–d, 27a,b, 35, and 50, characterized by their spectra.

Synthesis and Electrochemical Studies of TiO2 – Pani Nanocomposite

2013 ◽  
Vol 678 ◽  
pp. 263-267 ◽  
Author(s):  
Paramasivam Rajakani ◽  
Chinnapiyan Vedhi
Keyword(s):  
Crystalline Polymer ◽  
Chemical Oxidation ◽  
Sem Analysis ◽  
Spectral Studies ◽  
X Ray Diffraction ◽  
Cyclic Voltammetric ◽  
Voltammetric Studies ◽  
C And N ◽  
Cyclic Voltammetric Studies ◽  
Ceramic Nanocomposite

Aniline was polymerized with TiO2 by chemical oxidation method using Potassium perdisulphate. The solubility of the chemically prepared polymer–ceramic nanocomposite was ascertained and it showed good solubility in DMSO and DMF. The Pani–TiO2 nanocomposite was characterized by UV–Vis, FTIR spectral studies. Amine vibration observed at 1593 cm-1 was shifted to lower wave numbers when the polymer–ceramic nanocomposites were formed. The X-ray diffraction studies revealed the formation of nano sized (26 nm) crystalline polymer. SEM analysis showed mixed granular nature of the polymer–ceramic nanocomposite. EDAX analysis shows the presence of Ti, C and N. Cyclic Voltammetric studies exhibit good adherent behaviour on electrode surface at pH 1.0. It showed the presence of oxidation peaks at 0.271V and 0.623V and reduction peaks at 0.832 and 0.493V. CV, Chronoamperometric and chronocoulometric studies were also carried out at inert as well as oxidation atmosphere.

Synthesis, Characterisation and Voltammetric Behaviour of Pani-Clay (MMT) Nanocomposite

2013 ◽  
Vol 678 ◽  
pp. 258-262 ◽  
Author(s):  
Ragupathy Baby Suneetha ◽  
Chinnapiyan Vedhi
Keyword(s):  
Chemical Oxidation ◽  
Sem Analysis ◽  
Spectral Studies ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Cyclic Voltammetric ◽  
Polymer Clay Nanocomposite ◽  
Voltammetric Studies ◽  
C And N ◽  
Cyclic Voltammetric Studies

Aniline was polymerized with mmt (Montmorrillonite) by chemical oxidation method using potassium perdisulphate. The solubility of the chemically prepared polymer–clay nanocomposite was ascertained and it showed good solubility in DMSO and DMF. The Pani–mmt nanocomposites were characterized by UV–Vis, FTIR spectral studies. Amine vibration peak observed at 1593 cm-1 was shifted to lower wave numbers when the polymer–clay nanocomposites were formed. The X-ray diffraction studies revealed the formation of nano sized (26 nm) crystalline nanocomposite. SEM analysis showed mixed granular nature of the polymer–clay nanocomposite in which polymer was intercalated with the clay. EDAX analysis shows the presence of Na, Mg Al, Si, C and N. Cyclic Voltammetric studies exhibit good adherent behaviour on electrode surface at pH 1.0. It exhibited two oxidation peaks at 0.360V and 0.638V and two reduction peaks at 0.431V & 0.103V. Chronoamperometric and chronocoulometric studies were also carried out at inert as well as oxidation atmosphere.

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