scholarly journals Interaction of Cu(II) with Cytosine in Britton-Robinson Buffer Solution - A Cyclic Voltammetric Study

2015 ◽  
Vol 63 (1) ◽  
pp. 31-36
Author(s):  
AA Shaikh ◽  
Jannatul Firdaws ◽  
S Islam ◽  
PK Bakshi
Keyword(s):  
Cyclic Voltammetry ◽  
Suitable Condition ◽  
Anodic Peak ◽  
Molar Ratio ◽  
Cathodic Peak ◽  
Buffer Solution ◽  
Cyclic Voltammetric ◽  
Cyclic Voltammetric Study ◽  
Voltammetric Study ◽  
Electrochemical Redox

Electrochemical redox behavior of Cu(II) at different pH in Britton-Robinson (BR) buffer solution has been investigated using cyclic voltammetry at glassy carbon electrode (GCE). Cu(II) shows a cathodic peak and a hump-like peak, and an intense anodic peak at pH, 0.59, 1.59, 3.01 and 4.08. Although at lower pH (0.59 and 1.59) a cathodic peak, a hump and an anodic peak are observed, at higher pH (3.01 and 4.08) the hump-like cathodic peak disappeared. Cyclic voltammetry has also been used to observe the interaction of Cu(II) with cytosine in BR buffer solution at various pH. A reasonably strong interaction between Cu(II) and cytosine at different Cu(II)/cytosine molar ratio is observed at all the studied pH. However, maximum interaction occurs at 1:4 molar ratio at pH 4.08, this is perhaps the most suitable condition for Cu(II)-cytosine interaction. DOI: http://dx.doi.org/10.3329/dujs.v63i1.21765 Dhaka Univ. J. Sci. 63(1): 31-36, 2015 (January)

scholarly journals Cyclic Voltammetric Study of the Interaction of Biologically Important Metal Ion with Proton Pump Inhibitors

2016 ◽  
Vol 64 (1) ◽  
pp. 25-30
Author(s):  
Milton C Das ◽  
Rajib Biswas ◽  
Humaiara Akter ◽  
MA Haque ◽  
PK Bakshi ◽  
...  
Keyword(s):  
Proton Pump Inhibitors ◽  
Proton Pump ◽  
Metal Ion ◽  
Acetate Buffer Solution ◽  
Molar Ratio ◽  
Cathodic Peak ◽  
Buffer Solution ◽  
Cyclic Voltammetric ◽  
Cyclic Voltammetric Study ◽  
Voltammetric Study

Electrochemical studies on the interaction of Fe(III) with proton pump inhibitors (PPIs) (omeprazole, pantoprazole, esomeprazole and rabeprazole) in acetate buffer solution were carried out at gassy carbon electrode (GCE) at various pH (3.5, 4.0 and 4.5). In presence of omeprazole (Ome), the anodic and cathodic peak current for Fe(III) decreased in comparison to solely Fe(III). However, in some cases both the peaks were almost disappeared. Moreover, anodic and cathodic peaks shifted significantly towards negative potential. This is an indication that a strong interaction occurred between Fe(III) and Ome. The maximum interaction is found at 1:2 molar ratio of Fe(III) and Ome at above mentioned pH. The electrochemical interaction of Fe(III) and other PPIs was found as identical with the behavior of Ome. The electrochemical study of the interactions between metal ions and PPIs would provide important information for the technological application of PPIs in human body.Dhaka Univ. J. Sci. 64(1): 25-30, 2016 (January)

scholarly journals Interaction of Manganese(II) with Proton Pump Inhibitor at Different pH: A Cyclic Voltammetric Study

2016 ◽  
Vol 64 (2) ◽  
pp. 115-120
Author(s):  
R Biswas ◽  
S Islam ◽  
MS Rahman ◽  
MA Haque ◽  
M Abu Hasan ◽  
...  
Keyword(s):  
Proton Pump ◽  
Suitable Condition ◽  
Acetate Buffer ◽  
Acetate Buffer Solution ◽  
Molar Ratio ◽  
Cyclic Voltammograms ◽  
Buffer Solution ◽  
Cyclic Voltammetric ◽  
Cyclic Voltammetric Study ◽  
Insight Into

The electrochemistry of Mn2+ at different pH (3.5-4.5) in acetate buffer solution has been investigated, using cyclic voltammetric method at glassy carbon electrode (GCE). Cyclic voltammograms (CVs) of Mn2+ show two cathodic and an anodic peaks over the entire investigated pH. The CVs of Mn2+ has also been performed in presence of proton pump inhibitors (PPIs) such as omeprazole, pantoprazole, esomeprazole and rabeprazole to elucidate the interaction of Mn2+ with the PPIs in acetate buffer solution. At the studied pH, a reasonably strong interaction was observed between Mn2+ and PPIs at different molar ratio of Mn2+ ion and PPIs. However, maximum interaction has been found at 1:2 molar ratio of Mn2+ and PPIs. This indicates the most suitable condition for the interaction between Mn2+ and PPIs. These results could allow insight into the interactions of metal ions with the PPIs. Dhaka Univ. J. Sci. 64(2): 115-120, 2016 (July)

scholarly journals Voltammetric study of the interaction of Cu(II) with proton pump inhibitor at different pH

2015 ◽  
Vol 50 (3) ◽  
pp. 219-226
Author(s):  
R Biswas ◽  
MC Das ◽  
S Islam ◽  
MA Haque ◽  
AA Shaikh
Keyword(s):  
Proton Pump ◽  
Metal Ion ◽  
Acetate Buffer Solution ◽  
Molar Ratio ◽  
Cyclic Voltammograms ◽  
Buffer Solution ◽  
Cyclic Voltammetric ◽  
Voltammetric Study ◽  
Electrochemical Redox ◽  
Insight Into

The electrochemical redox behavior of transition metal ion, Cu(II) at different pH in acetate buffer solution has been investigated using cyclic voltammetric method at glassy carbon electrode (GCE). Cyclic voltammograms of Cu(II) show two cathodic and an anodic peaks those remain identical at various pH. The cyclic voltammetric response of the metal ion has been observed in presence of proton pump inhibitors (PPIs) such as omeprazole, pantoprazole, esomeprazole and rabeprazole at various proportions of metal ion and PPIs. The nature of cyclic voltammograms of Cu(II) has been changed dramatically in presence of the PPIs due to the strong interaction between metal ion and PPIs. Almost similar interaction was noticed for all the PPIs. However, the maximum interaction was found at 1:2 molar ratio of Cu(II) and PPIs. The result could provide deep insight into the interaction between various metal ions and the PPIs that have been taken quite regularly in human bodyBangladesh J. Sci. Ind. Res. 50(3), 219-226, 2015

A cyclic voltammetric study of some 4-substituted Benzene-1,2-diols

1983 ◽  
Vol 36 (5) ◽  
pp. 885 ◽  
Author(s):  
GM Proudfoot ◽  
IM Ritchie
Keyword(s):  
Cyclic Voltammetry ◽  
Linear Sweep Voltammetry ◽  
Molecular Size ◽  
Disc Electrode ◽  
Rotating Disc ◽  
Cyclic Voltammetric ◽  
Cyclic Voltammetric Study ◽  
Voltammetric Study ◽  
Stationary Electrode ◽  
Voltammetric Measurements

A voltammetric study of several 4-substituted benzene-1,2-diols in aqueous solutions as a function of pH has been carried out. From slow linear sweep voltammetry at a rotating disc electrode, diffusion coefficients were obtained which could be correlated, in the main, with molecular size. From cyclic voltammetry at a stationary electrode, it was established that the rate of the redox reaction decreases with increasing pH. The cyclic voltammetric measurements were also used to estimate E1/2 as a function of pH. All systems studied showed regions in which plots of E1/2 against pH were linear with a slope of close to -59 mV per pH unit. Such plots were used to estimate values of E1/2 at pH 0, which were then correlated with the Hammett function. The cyclic voltammetry also showed that the reactivity of the quinone formed by oxidation of the benzene-1,2 diols increased with pH. With the most reactive quinones (e.g. that formed from 3,4-dihydroxyacetophenone), a second pair of cyclic voltammetric peaks could be observed, which were ascribed to the oxidation and reduction of a dimer formed by quinone coupling.

Cyclic Voltammetric Study of 3,5-Diaryl-1-phenyl-2-pyrazolines

2019 ◽  
Vol 123 (13) ◽  
pp. 2820-2830 ◽  
Author(s):  
Marzieh Soltani ◽  
Reza Minakar ◽  
Hamid R. Memarian ◽  
Hassan Sabzyan
Keyword(s):  
Cyclic Voltammetric ◽  
Cyclic Voltammetric Study ◽  
Voltammetric Study
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