Electrochemical Interrogation of G3-Poly(propylene thiophenoimine) Dendritic Star Polymer in Phenanthrene Sensing

Abstract

A novel dendritic star-copolymer, generation 3 poly(propylene thiophenoimine) (G3PPT)-co-poly(3-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.

Electro‐photovoltaics of Polymer‐stabilized Copper–Indium Selenide Quantum Dot

“…Finally, the presence of DCM in the residual oil was extracted by rotary evaporation to attain a yellow oil as a desirable product as illustrated in Scheme 1. [31,32].…”

Phase Selective Alternating Current Voltammetric Signalling Protocol: Application in Dendritic Co‐polymer Sensor for Anthracene

“…Generation 3 poly(propylenethiophenoimine)‐co‐polythiophene star‐copolymer on gold electrode (Au|G3PPT‐co‐P3HT) was prepared as previously reported . Firstly, G3PPT was synthesized by the condensation reaction of 0.51 mmol G3PPI and 8.02 mmol 2‐thiophenecarboxaldehyde (2TCA).…”

“…The determination of phenanthrane (PHE) with the Au|G3PPT‐co‐P3HT sensor has previously been reported . In this study the determination of AN and PHE was investigated due to the structural similarities of the two analytes .…”

“…Both analytes were detected at distinct potentials and they also exhibit differences in LOD and LR . As contained in Figure , AN gives two signals at 850 mV and 1150 mV, whereas PHE gives a main response at 1280 mV and a minor one at 950 mV at 10 mV/s and 5 Hz. However, a mixture of equal amounts of AN and PHE produces only one peak at 1200 mV indicating the sensor's suitability for possible determination of total polyaromatic hydrocarbons in a sample.…”

“…Generally, electroanalysis can be applied to any electroactive compound which is reproducibly adsorbed on electrode surface . In this work a novel dendritic poly(propylenethiophenoimine)‐co‐polythiophene‐on‐gold electrode (Au|G3PPT‐co‐P3HT) was used for the determination of anthracene.…”