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. 2014 Aug 21;12(8):4635–4658. doi: 10.3390/md12084635

Figure 2.

Figure 2

FT-IR spectra overlay of the main compounds and final C-2 spacer quaternary derivatives of the representative chitosan material (CS-i, 7%_DA): (A) Mes-CS, 2i; (B) diTBDMS-CS, 3i; (C) BrA-diTBDMS-CS, 4i; (D) TMA-CS, 6i; (E) PyA-CS, 8i.