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Electrochemistry of...
Electrochemistry of guanine and 8-oxoguanine at gold electrodes
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- Ferapontova, Elena (författare)
- Lund University,Lunds universitet,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- Elsevier BV, 2004
- 2004
- Engelska.
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Ingår i: Electrochimica Acta. - : Elsevier BV. - 0013-4686. ; 49:11, s. 1751-1759
- Relaterad länk:
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http://dx.doi.org/10...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Guanine was electrochemically oxidised at polycrystalline gold electrodes. The potential for guanine oxidation at pH 7.4 was +690 mV versus AgAgCl when extrapolated to a scan rate of 3 mV s(-1). Kinetic analysis revealed the initial irreversible 2e(-) oxidation of guanine, achieved with fast scan cyclic voltammetry. At scan rates lower than 5 V s(-1), the 2e(-) oxidation changed to the extensive 4e(-) one. The initial 2e- oxidation of guanine, observed in the first scan, resulted in a quasi-reversible 1e(-) redox process of the oxidation product in the following scans, with a formal potential (E-o/) of +263 mV. This correlated well with the redox transformations of 8-oxo-7,8-dihydroguanine (8-oxoguanine, 8-oxoG). The kinetics of guanine oxidation on gold is discussed in detail within Laviron's approach and compared with that of 8-oxoG. (C) 2003 Elsevier Ltd. All rights reserved.
Ämnesord
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
Nyckelord
- polycrystalline gold
- electrochemical oxidation
- guanine
- 8-oxoguanine
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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