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. 2022 Mar 30;14(4):744. doi: 10.3390/pharmaceutics14040744

Figure 7.

Figure 7

Peak fitting of FTIR spectra in the range of the out-of-plane deformation region resulted in a sigmoid type of curves with the grinding time, which confirmed the expected autocatalytic phase transformation type of kinetics of the product formation. (A)—fitted curves after 30 min grinding with residues of the starting materials in the TER-DIMEB mixture, (B)—fitted curves after 105 min grinding without residues of the starting materials in the TER-DIMEB mixture. Kinetic curves for the starting materials and the products constructed from the areas of the fitted peaks (C)—in the case of TER-DIMEB, and (D)—in the case of TER-HPBCD mixture. The kinetic curves were calculated from the contribution of the areas of the peaks of increasing and those of decreasing intensities to the sum of the peak areas.