D-A-D-structured conducting polymer-modified electrodes for detection of lead(II) ions in water

Kumar, Prajwal and Saravanan, S and Ranjith, K and Ramamurthy, Praveen C (2014) D-A-D-structured conducting polymer-modified electrodes for detection of lead(II) ions in water. In: JOURNAL OF APPLIED ELECTROCHEMISTRY, 44 (1). pp. 133-139.

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Abstract

Donor-acceptor-donor-structured thiophene derivative-based conducting polymer poly(7,9-dithiophene-2yl-8H-cyclopentaa]acenaphthalene-8-one) was chemically synthesized. This polymer was used to modify both glassy-carbon and carbon-paste electrode, which was used to detect lead(II) ions present in water in the range of 1 mM to 0.1 mu M. Cyclic voltammetry confirms the formation of the co-ordination complex between the soft segment of polymer and the dissolved lead ion. Anodic stripping voltammetry was carried out by the modified electrode to determine the lower limit of detection of dissolved lead(II) species in the solution. Differential adsorptive stripping and impedance measurements were also conducted to find the lowest possible response of the as-synthesized polymer to lead(II) ion in water. The electrochemical performance of the modified electrodes at different pH (4, 7 and 9) environments was carried out by stripping voltammetry, to get optimum sensitivity and stability under these conditions. Finally, interference analysis was carried out to detect the modified electrode's sensitivity towards lead ion affinity in water.

Item Type:	Journal Article
Publication:	JOURNAL OF APPLIED ELECTROCHEMISTRY
Publisher:	SPRINGER
Additional Information:	Copyright for this article belongs to the SPRINGER, NETHERLANDS
Keywords:	Donor-acceptor-donor (DAD); Differential pulse adsorptive stripping voltammetry; Electrochemical impedance; Square-wave voltammetry; Lower limit of detection (LLOD)
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	13 Feb 2014 09:53
Last Modified:	13 Feb 2014 09:53
URI:	http://eprints.iisc.ac.in/id/eprint/48369

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