Fig. 2. (a) Assigned structures and respective end-groups. (b) Assigned matrix-assisted laser desorption ionization (MALDI) mass spectrometry of P3OT–PFB (top) and P3OT–PFB–SC₁₂H₂₅ (bottom). (c) Selected aromatic and methylene regions of ¹H NMR spectra of P3OT–PFB (top) and P3OT–PFB–SC₁₂H₂₅ (bottom) showing the new triplet at 3.00 ppm assigned to the PFB–S–CH₂– group. (d) ¹⁹F NMR spectra of P3OT–PFB (top) and P3OT–PFB–SC₁₂H₂₅ (bottom), with ortho (o), meta (m), and para (p) positions assigned.