Electrochemical Interrogation of G3-Polypropylene thiophenoimine Dendritic Star Polymer in Phenanthrene SensingReport as inadecuate




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Sensor Lab, Department of Chemistry, University of the Western Cape, Bellville 7535, South Africa





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Academic Editor: W. Rudolf Seitz

Abstract A novel dendritic star-copolymer, generation 3 polypropylene thiophenoimine G3PPT-co-poly3-hexylthiophene P3HT star co-polymer on gold electrode i.e., Au|G3PPT-co-P3HT was used as a sensor system for the determination of phenanthrene PHE. The G3PPT-co-P3HT star co-polymer was synthesized via in situ electrochemical co-polymerization of generation 3 poly propylene thiophenoimine and poly 3-hexylthiophene on gold electrode. 1HNMR spectroscopy was used to determine the regioregularity of the polymer composites, whereas Fourier transform infrared spectroscopy and scanning electron microscopy were used to study their structural and morphological properties. Au|G3PPT-co-P3HT in the absence of PHE, exhibited reversible electrochemistry attributable to the oligo thiophene ‘pendants’ of the dendrimer. PHE produced an increase in the voltammetric signals anodic currents due to its oxidation on the dendritic material to produce catalytic current, thereby suggesting the suitability of the Au|G3PPT-co-P3HT electrode as a PHE sensor. The electrocatalysis of PHE was made possible by the rigid and planar oligo-P3HT species formed upon the oxidation of the oligo thiophene pendants of the star-copolymer, which allowed the efficient capture binding and detection electrocatalytic oxidation of PHE molecules. View Full-Text

Keywords: alternating current voltammetry; cyclic voltammetry; square wave voltammetry; phenanthrene; star-copolymer sensor alternating current voltammetry; cyclic voltammetry; square wave voltammetry; phenanthrene; star-copolymer sensor





Author: Hlamulo R. Makelane, Oluwakemi Tovide, Christopher E. Sunday, Tesfaye Waryo and Emmanuel I. Iwuoha *

Source: http://mdpi.com/



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