Modification of electrodes with nanostructured functionalized thiadiazole polymer film and its application to the determination of ascorbic acid

Palraj, Kalimuthu and John, S. Abraham (2009) Modification of electrodes with nanostructured functionalized thiadiazole polymer film and its application to the determination of ascorbic acid. Electrochimica Acta, 55 1: 183-189. doi:10.1016/j.electacta.2009.08.034


Author Palraj, Kalimuthu
John, S. Abraham
Title Modification of electrodes with nanostructured functionalized thiadiazole polymer film and its application to the determination of ascorbic acid
Journal name Electrochimica Acta   Check publisher's open access policy
ISSN 0013-4686
1873-3859
Publication date 2009-12-01
Sub-type Article (original research)
DOI 10.1016/j.electacta.2009.08.034
Volume 55
Issue 1
Start page 183
End page 189
Total pages 7
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Formatted abstract
We report the electropolymerization of 2-amino-1,3,4-thiadiazole (ATD) on glassy carbon (GC) and indium tin oxide (ITO) electrodes in 0.10 M H2SO4. The electropolymerized ATD (p-ATD) film was characterized by cyclic voltammetry, attenuated total reflectance (ATR)-FT-IR spectroscopy, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The AFM image showed that the p-ATD formed a spherical-like structure with a thickness of 25 nm. XPS of the p-ATD film showed binding energies at 398.7, 400.3 and 401.3 eV in the N 1s region corresponding to -N{double bond, long}, -NH- and -N+H-, respectively, and at 285.5 and 287.0 eV in the C 1s region corresponding to C-N and C{double bond, long}N, respectively. The appearance of binding energies at 285.5 and 287.0 eV confirmed that the p-ATD film proceeded via C-N and C{double bond, long}N linkages and not via C-C or C{double bond, long}C linkages. The p-ATD film deposited on the GC electrode was successfully used for the determination of ascorbic acid (AA) at physiological pH. The amperometric current was increased linearly from 7.5 × 10-8 to 2.0 × 10-5, and the detection limit was found to be 0.28 nM (S/N = 3).
Keyword Electropolymerization
2-Amino-1,3,4-thiadiazole
Nanostructured film
Afm
Ascorbic acid
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: ERA 2012 Admin Only
School of Chemistry and Molecular Biosciences
 
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