In this mini review, we strive to highlight the opportunities that exist for the use of aniline oligomeric species in functional materials by reviewing the current state-of-the-art of the various synthetic strategies, as well as the growing number of publications where more complex block-like architectures have been shown. Areas for further investigation and possible future development are highlighted as well.

Aniline Oligomers – Architecture, Function and New Opportunities for Nanostructured Materials

Raman and infrared reflection spectra in the backbone deformations and lattice modes range (10−1000 cm-1) of EB/ES-I and EB/ES-II polyanilines are discussed and compared with those of an oligomer (...

Vibrational study of short-range order and structure of polyaniline bases and salts

Effects from various initial molar ratios of aniline (AN), ammonium peroxydisulfate (APS) and HCl ([AN]:[APS]:[HCl]) on the polymerization of AN were investigated. First, a scheme derived from a molecular point of view was proposed to distinguish formation mechanisms based on their initial conditions. Thereafter, by choosing a relatively low ratio of [APS]/[AN]=0.23 at [AN]=0.27 M, three cases can be categorized according to this scheme: (A) [AN]≫[HCl], (B) [AN] slightly larger than [HCl] and (C) [AN]<[HCl]. For case (A), the initial solution has a richness of neutral ANs. Both the doped and the dedoped samples are confirmed to have features of phenazine-like oligomers. For case (C), neutral ANs are almost protonated to become anilinium cations. The final products possess features of polyaniline. For case (B), the samples possess both features from cases (A) and (C). Finally, the formation mechanisms for polymerization of AN were discussed. A schematic diagram to reveal the effects from various initial molar ratios of [AN]:[APS]:[HCl] on the polymerization of aniline (AN) is proposed with [APS]/[AN]=0.23 at [AN]=0.27 M. For [AN]=[HCl], the initial solution has a richness of neutral ANs. The as-obtained samples have features of phenazine-like oligomers. For [AN]<[HCl], neutral ANs are almost protonated to become anilinium cations. The as-obtained samples possess features of polyaniline. Finally, the formation mechanisms for polymerization of AN into various forms of nanostructures were discussed.

/pdf/polymerization-of-aniline-under-various-concentrations-of-2fjor87spo.pdf

Polymerization of aniline under various concentrations of APS and HCl

Corrosion inhibition by aniline oligomers through charge transfer: a DFT approach

Electron localization studies of alkoxy polyanilines

Aggregation and interchain “self” doping in emeraldine base

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Aggregation and interchain “self” doping in emeraldine base