Factors affecting the radical scavenging activity of polyaniline

被引：35

作者：

Nand, Ashveen V. ^{[1
]}

Ray, Sudip ^{[1
]}

Easteal, Allan J. ^{[1
]}

Waterhouse, Geoffrey I. N. ^{[1
]}

Gizdavic-Nikolaidis, Marija ^{[1
]}

Cooney, Ralph P. ^{[1
]}

Travas-Sejdic, Jadranka ^{[1
]}

Kilmartin, Paul A. ^{[1
]}

机构：

[1] Univ Auckland, Dept Chem, Auckland, New Zealand

来源：

SYNTHETIC METALS | 2011年 / 161卷 / 13-14期

关键词：

Polyaniline; Nanorods; DPPH; Surface area; Radical scavenging; RAY PHOTOELECTRON-SPECTROSCOPY; CONDUCTING POLYMERS; ANTIOXIDANT; NANOTUBES; SURFACE; AREA; XPS;

D O I：

10.1016/j.synthmet.2011.04.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polyaniline was chemically synthesized by oxidizing aniline with ammonium persulfate with and without hydrochloric acid (G-PANI and NR-PANI. respectively). NR-PANI and G-PANI were dedoped with ammonium hydroxide to yield NR-PANIdd and G-PANIdd. SEM images revealed a typical granular morphology for G-PANI and G-PANIdd, while NR-PANI, formed using a 'falling pH method', and NR-PANIdd, consisted of micro/nanorods and flakes. The samples were characterized using FTIR and the level of oxidation was determined by X-ray photoelectron spectroscopy (XPS). The surface area of the samples was measured by the BET method. The free radical scavenging activity, using the DPPH center dot assay, showed the following ranking: NR-PANI > G-PANI approximate to NR-PANIdd > G-PANIdd. The radical scavenging activity of the polyanilines did not correlate with conductivity or surface area measurements, but was critically dependent upon the level of oxidation, and higher activity was obtained with the more reduced polyaniline samples. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1232 / 1237

页数：6

共 37 条

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