Direct electrocatalytic oxidation of adenine and guanine on carbon ionic liquid electrode and the simultaneous determination

Sun, Wei; Li, Yinzhuo; Duan, Yan; Jiao, Kui

doi:10.1016/j.bios.2008.07.068

Cited by 126 publications

(40 citation statements)

References 31 publications

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“…As shown in ) + (1 −˛) log˛− log(RT/nFv) − ␣(1 − ␣) − log (nF E p /2.3RT), the k s is calculated to be 2.51 and 2.13 s −1 for G and A, respectively. This k s is comparable with that on Mo(VI) complex-TiO 2 nanoparticle modified carbon paste electrode (3.83 s −1 ) [33], and it is much higher than that previously reported on carbon ionic liquid electrode (7.42 × 10 −4 s −1 for A and 2.39 × 10 −3 s −1 for G) [36]. These results demonstrate that the TiO 2 -graphene nanocomposite significantly facilitates the electron transfer kinetics and promotes the electrochemical oxidation of these small biomolecules.…”

Section: Preparation and Characterization Of Tio 2 -Graphene Nanocompsupporting

confidence: 83%

“…Therefore, the guanine and adenine could be determined simultaneously from a mixture in large concentration domains by the proposed method. The linear detection range for both A and G is 0.5-200 M, which is much wider than the previously reported electrochemical sensors [34][35][36][37][38][39]. The detection limit (S/N = 3) for A and G was calculated to be 0.10 M and 0.15 M, respectively.…”

Section: Determination Of Adenine and Guaninementioning

confidence: 66%

“…Thermally denatured dsDNA was prepared according to the literature method [36]. Briefly, the native herring sperm dsDNA solution was heated in a boiling water bath at 100 • C for about 10 min, and then it was rapidly cooled in an ice bath.…”

Section: Preparation Of Dna Samplesmentioning

confidence: 99%

“…However, adenine and guanine exhibit slow direct electron transfer and irreversible absorption on the electrode surface, which lead to low sensitivity for DNA detection. Over the past years, considerable efforts have been paid on the development of chemical modified electrodes to improve the electrochemical sensing performance for guanine and adenine [31][32][33][34][35][36][37][38][39]. Most recently, Dong and coworkers revealed that the free base of DNA have enhanced electrochemical reactivity at the graphene modified glassy carbon electrode [10].…”

Section: Introductionmentioning

confidence: 99%

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TiO2-graphene nanocomposite for electrochemical sensing of adenine and guanine

Fan

Huang

Niu

et al. 2011

Electrochimica Acta

188

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a b s t r a c tTiO 2 -graphene nanocomposite was prepared by hydrolysis of titanium isopropoxide in colloidal suspension of graphene oxide and in situ hydrothermal treatment. It provides an efficient and facile approach to yield nanocomposite with TiO 2 nanoparticles uniformly embedded on graphene substrate. The electrochemical behavior of adenine and guanine at the TiO 2 -graphene nanocomposite modified glassy carbon electrode was investigated. The results show that the incorporation of TiO 2 nanoparticles with graphene significantly improved the electrocatalytic activity and voltammetric response towards these species comparing with that at the graphene film. The TiO 2 -graphene based electrochemical sensor exhibits wide linear range of 0.5-200 M with detection limit of 0.10 and 0.15 M for adenine and guanine detection, respectively. The excellent performance of this electrochemical sensor can be attributed to the high adsorptivity and conductivity of TiO 2 -graphene nanocomposite, which provides an efficient microenvironment for electrochemical reaction of these purine bases.

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Section: Preparation and Characterization Of Tio 2 -Graphene Nanocompsupporting

confidence: 83%

Section: Determination Of Adenine and Guaninementioning

confidence: 66%

Section: Preparation Of Dna Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

TiO2-graphene nanocomposite for electrochemical sensing of adenine and guanine

Fan

Huang

Niu

et al. 2011

Electrochimica Acta

188

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show abstract

“…By far, many examples have been reported. Carbon ionic liquid electrode was prepared, offering a strategy for the simultaneous determination of guanine and adenine [12]. Liu's group used the polythionine/NPAu/MWNT modified electrode to determinate the guanine and adenine in DNA [13].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous determination of guanine and adenine on CuO shuttle-like nanocrystals/poly(neutral red) film on glassy carbon electrode

Liang

Zhang

Wang

et al. 2014

J Solid State Electrochem

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CuO shuttle-like nanocrystals on a poly(neutral red) glassy carbon electrode (nano-CuO/PNR/GCE) has been fabricated and used to simultaneously detect guanine and adenine. The sample is characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). It has been shown that the oxidation peak current of guanine and adenine could be greatly enhanced with the nano-CuO/PNR/GCE. Under optimal conditions, the anodic peak current of differential pulse voltammetry is proportional to the concentration of the guanine and adenine in the range of 0.05 to 3.0 μM. The corresponding detection limits are 1.6×10 −2 μM for guanine and 2.3×10 −2 μM for adenine (S/N=3). The nano-CuO/PNR/ GCE exhibits good storage stability and reproducibility for practical application. It could be applied to simultaneously determination of guanine and adenine for the samples with good anti-interference ability.

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Analytical Applications of Ionic Liquids

Acree

Grubbs

2012

Encyclopedia of Analytical Chemistry

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Analytical methods involving ionic liquids (ILs) have significantly increased in recent years, in part because of the unique solubilization and physical properties on this class of organic compounds. This article provides an overview of the different applications of ionic liquids in analytical chemistry. The presentation is divided into a section describing the properties of liquids that are of interest to analytical chemists, followed by nine sections pertaining to simple biphasic liquid‐liquid extractions, liquid‐phase microextraction methods, ionic liquid‐based solid‐phase microextractions (SPME), thin layer chromatographic (TLC) and high‐performance liquid chromatographic (HPLC) methods, electromigration methods, gas‐liquid chromatographic (GLC) methods, supported ionic liquid membrane separations, mass spectrometric methods, electrochemical methods, and spectroscopic methods. Representative samples of each application are given, along with specific references to the ionic liquid used and type of sample analyzed.

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Direct electrocatalytic oxidation of adenine and guanine on carbon ionic liquid electrode and the simultaneous determination

Cited by 126 publications

References 31 publications

TiO2-graphene nanocomposite for electrochemical sensing of adenine and guanine

TiO2-graphene nanocomposite for electrochemical sensing of adenine and guanine

Simultaneous determination of guanine and adenine on CuO shuttle-like nanocrystals/poly(neutral red) film on glassy carbon electrode

Analytical Applications of Ionic Liquids

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