Direct electrochemistry of single-stranded DNA on an ionic liquid modified carbon paste electrode

Sun, Wei; Li, Yinzhuo; Yang, Maoxia; Liu, Shufeng; Jiao, Kui

doi:10.1016/j.elecom.2007.12.012

Cited by 73 publications

(26 citation statements)

References 28 publications

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“…RTILs have received great attention for their specific characteristics, such as good chemical and thermal stability, high ionic conductivity, negligible vapor pressure, wide potential windows, and they could provide a remarkable increase in the electron transfer rate of different organic and/or inorganic electroactive compounds, offer a marked decrease in the overpotential for biomolecules and enhance the electrochemical signal. 16 RTILs have been used as modifier to be a new kind of media on the surface of the electrode in the field of electrochemistry. 17 Recently, layered double hydroxides (LDHs) have attracted great attention for their potential application in a wide range of area.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysis Oxidation of GMP Based on Layered Double Hydroxide Functionalized with Anionic Surfactant and Room Temperature Ionic Liquid Modified Glassy Carbon Electrode

Cui

Yin

et al. 2011

Chin. J. Chem.

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The electrocatalysis oxidation of guanosine-5'-monophosphate (GMP) was investigated on Mg-Al layered double hydroxide (LDH) functionalized with sodium dodecyl sulfate (SDS) and room temperature ionic liquid (RTIL) modified glass carbon electrode (GCE). The cyclic voltammogram of GMP on the modified electrode (RTIL/ LDH-SDS/GCE) exhibited a well defined anodic peak at 1.091 V in 0.2 mol•L -1 pH 4.4 acetate buffer solution. The GMP oxidation was enhanced in the presence of anionic surfactant in the films. The results suggest that the surfactant molecules intercalate the LDH layers to preconcentrate GMP molecules and the RTIL showed good ionic conductivity. The experimental parameters were optimized, the kinetic parameters were investigated and the probable oxidation mechanism was proposed. Under the optimized conditions, the oxidation peak current was proportional to GMP concentration in the range from 5.0×10 -7 to 1.0×10 -4 mol•L -1 with the correlation coefficient of 0.9987 and the detection limit was 1.0×10 -7 mol•L -1 . The RTIL/LDH-SDS/GCE showed a good electrochemical response to the oxidation of GMP and would be developed into a new biosensor.

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Section: Introductionmentioning

confidence: 99%

Electrocatalysis Oxidation of GMP Based on Layered Double Hydroxide Functionalized with Anionic Surfactant and Room Temperature Ionic Liquid Modified Glassy Carbon Electrode

Cui

Yin

et al. 2011

Chin. J. Chem.

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“…The peak potential differences caused by C methylation were measured to achieve the direct electrochemical determination of 5-mC and C bases. Carbon-based electrodes such as glassy carbon [16,17], carbon paste [18,19], pyrolytic graphite [20,21], have been widely used for the direct oxidation DNA measurements. Nevertheless, because of the relative narrow potential window, high background current or slow electron transfer for most electrode materials [14,22,23], up to now, only electron cyclotron resonance nanocarbon film electrode [14] and choline monolayer supported multiwalled carbon nanotubes film electrode [24] may realize the simultaneous detection of 5-mC and C by the direct electrocatalytic oxidation.…”

Section: Introductionmentioning

confidence: 99%

Direct Electrocatalytic Oxidation and Simultaneous Determination of 5‐Methylcytosine and Cytosine at Electrochemically Reduced Graphene Modified Glassy Carbon Electrode

Zheng

Wang

2013

Electroanalysis

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Direct electrocatalytic oxidation and simultaneous determination of 5-methylcytosine (5-mC) and cytosine(C) were realized in alkaline solutions by differential pulse voltammetry (DPV) based on an electrochemically reduced graphene oxide (er-GO) modified glassy carbon electrode (er-GO/GCE). The as-prepared er-GO/GCE exhibited good electrocatalytic activity towards the oxidation of 5-mC and C. Under optimum conditions, the er-GO/GCE was applied to the simultaneous determination of 5-mC and C with a significantly improved peak potential resolution (about 150 mV), and a linear relationship can be obtained in the range of 6-200.0 mmol/L and 8-250.0 mmol/L, respectively. In addition, the proposed method was further successfully applied to the analysis of methylation status in short CpG oligonucleotides with satisfactory results.

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“…[115,117,119,126,127]), via studies on the specific ion / charge transfer in ILs [115][116][117]120] and their electrocatalytic effect [121,128,137], up to first analytical applications to the determination of various organic and biologically active compounds. Namely, of interest were the following substances: ClO 4 − and PF 6 − anions [116]; nitrite, NO 2 − [115,126,128]; hydrogen peroxide (in environmental samples [125]); hydrazine [133]; n-alkyl-amines [124]; phenol, amino-phenols, and catechol [123,130], nitro-phenols (p-nitrophenol and Methylparathion in waste-water [137]); hydroquinone (in cosmetic cream and waste-water [127,139]); glucose [138], calcium dobesilate (in capsule and urine [122]); Paracetamol (in pharmaceuticals and urine [136]); Acetaminophen [133]; ascorbic acid (AA, in model samples [117,133] or tablets of Vitamin-C [120]); dopamine (DO, in injection samples [117,129]), including simultaneous determination of AA, uric acid (UA), and DO in human blood and urine [118]; NAD(H) [117], and DNA [132,135]. In another analogy with CNTs, also (RT)ILs can be used as (i) mixtures with graphite, where the ionic liquid replaces ordinary binders (e.g.…”

Section: Carbon Ionic-liquid Electrodes (Ciles)mentioning

confidence: 99%

Carbon paste electrodes in the new millennium

et al. 2009

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Abstract:In this review (with 500 refs), both electrochemistry and electroanalysis with carbon paste-based electrodes, sensors, and detectors are of interest, when attention is focused on the research activities in the years of new millennium. Concerned are all important aspects of the field, from fundamental investigations with carbon paste as the electrode material, via laboratory examination of the first electrode prototypes, basic and advanced studies of various electrode processes and other phenomena, up to practical applications to the determination of inorganic ions, complexes, and molecules. The latter is presented in a series of extensive tables, offering a nearly complete survey of methods published within the period of [2001][2002][2003][2004][2005][2006][2007][2008]. Finally, the latest trends and outstanding achievements are also outlined and future prospects given.© Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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Direct electrochemistry of single-stranded DNA on an ionic liquid modified carbon paste electrode

Cited by 73 publications

References 28 publications

Electrocatalysis Oxidation of GMP Based on Layered Double Hydroxide Functionalized with Anionic Surfactant and Room Temperature Ionic Liquid Modified Glassy Carbon Electrode

Electrocatalysis Oxidation of GMP Based on Layered Double Hydroxide Functionalized with Anionic Surfactant and Room Temperature Ionic Liquid Modified Glassy Carbon Electrode

Direct Electrocatalytic Oxidation and Simultaneous Determination of 5‐Methylcytosine and Cytosine at Electrochemically Reduced Graphene Modified Glassy Carbon Electrode

Carbon paste electrodes in the new millennium

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