Parent aniline oligomers such as tetramer and “16-mer” have been synthesized by a general method. This method can be used to synthesize other oligomers by selecting appropriate ratios of reactants and appropriate oxidants. The oligomers were characterized by UV/Vis, IR, NMR, mass spectroscopy, GPC and elemental analysis. The conductivities of HCl doped oligomers were lower than that of polyaniline.
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Zhang et al. (1997) studied this question.