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Journals / Turkish Journal of Chemistry / 2013 / Cilt: 37 - Sayı: 3

Electrochemistry of 2,6-diaminopurine on multiwall carbon nanotube modified glassy carbon electrode

Ebru MAVİOĞLU AYAN
Şükriye ULUBAY KARABİBEROĞLU
Zekerya DURSUN
Pages
325–334
Publication Date
2013-03-01
DOI
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The electrocatalytic oxidation of 2,6-DAP on MWCNT/GCE showed that acid pretreated multiwall carbon nanotube can be used in new applications in electrochemical determinations of biologically important compounds.

📌 3 Key Takeaways

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Objective & Hypothesis:The electrochemical oxidation of 2,6-diaminopurine (2,6-DAP) was studied in pH 7.4 phosphate buffer solution on multiwall carbon nanotube modified glassy carbon electrode (MWCNT/GCE) over a temperature range of 20 to 50 °C using cyclic voltammetry. 2,6-DAP oxidation on MWCNT/GCE showed a well-defined and irreversible oxidation peak at about 0.72 V vs.
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Key Findings & Data:The oxidation potential of 2,6-DAP linearly varied with pH over the range of 3.0 to 10.0 with a slope of --0.0547 V/pH, implying that 2 protons were accompanied by 2 electrons transferred in the electrochemical reaction.
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Conclusion & Impact:The electrocatalytic oxidation of 2,6-DAP on MWCNT/GCE showed that acid pretreated multiwall carbon nanotube can be used in new applications in electrochemical determinations of biologically important compounds.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Carbon nanotubes · 6-diaminopurine · activation energy

Abstract

The electrochemical oxidation of 2,6-diaminopurine (2,6-DAP) was studied in pH 7.4 phosphate buffer solution on multiwall carbon nanotube modified glassy carbon electrode (MWCNT/GCE) over a temperature range of 20 to 50 °C using cyclic voltammetry. 2,6-DAP oxidation on MWCNT/GCE showed a well-defined and irreversible oxidation peak at about 0.72 V vs. Ag/AgCl at pH 7.4. The oxidation potential of 2,6-DAP linearly varied with pH over the range of 3.0 to 10.0 with a slope of --0.0547 V/pH, implying that 2 protons were accompanied by 2 electrons transferred in the electrochemical reaction. The activation energy, Ea, of oxidation reaction was found to be 33.10 \pm 1.88 kJ/mol. The differential pulse voltammetric determination of 2,6-DAP was also studied. The peak currents increased linearly with increasing of the 2,6-DAP concentration range from 0.4 m mol/L to 80 m mol/L. The linear regression equation appeared as Ip/mA = --(1.66 \pm 0.42) + (4.21 \pm 0.11) [2,6-DAP]/m mol/L, R2 = 0.9982, and the detection limit (S/N = 3) was 3 \times 10-7 \pm 0.015 mol/L (n =3). The electrocatalytic oxidation of 2,6-DAP on MWCNT/GCE showed that acid pretreated multiwall carbon nanotube can be used in new applications in electrochemical determinations of biologically important compounds.

Özet

The electrochemical oxidation of 2,6-diaminopurine (2,6-DAP) was studied in pH 7.4 phosphate buffer solution on multiwall carbon nanotube modified glassy carbon electrode (MWCNT/GCE) over a temperature range of 20 to 50 °C using cyclic voltammetry. 2,6-DAP oxidation on MWCNT/GCE showed a well-defined and irreversible oxidation peak at about 0.72 V vs. Ag/AgCl at pH 7.4. The oxidation potential of 2,6-DAP linearly varied with pH over the range of 3.0 to 10.0 with a slope of --0.0547 V/pH, implying that 2 protons were accompanied by 2 electrons transferred in the electrochemical reaction. The activation energy, Ea, of oxidation reaction was found to be 33.10 \pm 1.88 kJ/mol. The differential pulse voltammetric determination of 2,6-DAP was also studied. The peak currents increased linearly with increasing of the 2,6-DAP concentration range from 0.4 m mol/L to 80 m mol/L. The linear regression equation appeared as Ip/mA = --(1.66 \pm 0.42) + (4.21 \pm 0.11) [2,6-DAP]/m mol/L, R2 = 0.9982, and the detection limit (S/N = 3) was 3 \times 10-7 \pm 0.015 mol/L (n =3). The electrocatalytic oxidation of 2,6-DAP on MWCNT/GCE showed that acid pretreated multiwall carbon nanotube can be used in new applications in electrochemical determinations of biologically important compounds.

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Cite This Article

AYAN, E. M., KARABİBEROĞLU, Ş. U., DURSUN, Z. (2013). Electrochemistry of 2,6-diaminopurine on multiwall carbon nanotube modified glassy carbon electrode. Turkish Journal of Chemistry, Cilt: 37 - Sayı: 3, 325–334. https://ajindex.com/articles/184851

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