fig2

Figure 2. (A-C) (Left) Photographs of the polymerization mixture at the polymerization times of: (A) 1 min; (B) 4 min; and (C) 9 min. (Right) TEM images of β-CD mediated nanostructures assembled from oligoaniline for 12 h with the addition of β-CD at different polymerization times: (A) 1 min; (B) 4 min; and (C) 9 min. (A and B) (Inset) Magnified TEM images. (D-F) High-resolution mass spectra (HRMS with ESI mode) of the polymerization mixture at the polymerization times of: (D) 1 min; (E) 4 min; and (F) 9 min. Note that the aniline monomer and its oligomers (oligoaniline derivatives), such as dimer, trimer, tetramer, pentamer, hexamer, heptamer, and octamer, are carefully labeled in (D-F). TEM: Transmission electron microscope; β-CD: β-cyclodextrin; HRMS: high-resolution mass spectrometry.