Simultaneous oxidation of aniline and tannic acid with peroxydisulfate: Self-assembly of oxidation products from nanorods to microspheres

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• 作者：Aleksandra Jano&scaron ; evi膰^a ; Gordana 膯iri膰-Marjanovi膰^b ; ^{gordana@ffh.bg.ac.rs} ; Biljana &Scaron ; ljuki膰 Paunkovi膰^b ; Igor Pa&scaron ; ti^b ; Sne啪ana Trifunovi膰^c ; Budimir Marjanovi膰^d ; Jaroslav Stejskal^e
• 关键词：Copolymerization ; Aniline ; Tannic acid ; Polyaniline ; Nanorods ; Microspheres
• 刊名：Synthetic Metals
• 出版年：2012
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：June, 2012
• 卷：162
• 期：9-10
• 页码：843-856
• 文件大小：2621 K

摘要

The oxidation of aniline with ammonium peroxydisulfate (APS) in aqueous solution of the plant-derived polyphenol, tannic acid, is reported. The effect of initial mole ratios [tannic acid]/[aniline] and [APS]/[aniline] on molecular structure, morphology, conductivity, and electroactivity of synthesized materials (PANI-TA) was investigated by UV-Vis, FTIR, Raman and EPR spectroscopies, scanning and transmission electron microscopies (SEM and TEM), conductivity measurements, and cyclic voltammetry, respectively. PANI-TA nanorods with the average diameter of 70-100 nm and conductivity of 1 脳 10^鈭? S cm^鈭? were synthesized at [tannic acid]/[aniline] = 0.01 and [APS]/[aniline] = 1, while nonconductive, solid microspheres were obtained at [tannic acid]/[aniline] = 0.1 and [APS]/[aniline] = 2. The mechanism of the early stages of simultaneous oxidation of aniline and tannic acid has been computationally studied by the RM1/COSMO method.