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. Author manuscript; available in PMC: 2020 Oct 15.
Published in final edited form as: Cryst Growth Des. 2019;19(9):https://doi.org/10.1021/acs.cgd.9b00182.

Figure 3.

Figure 3.

Overlay of the FT-IR absorption spectra of TTF-CAH2 at 300 K (dark red), 250 K (light red), 200 K (orange), 150 K (brown), 100 K (green), 50 K (light blue), and 10 K (dark blue), for (a) TTF-CAH2 form I, and (b) TTF-CAH2 form II. The band gaps shown in the figure correspond to the absorption edges, estimated as the extrapolation of the dashed lines on the frequency axes at 1175 cm−1 for form I and 925 cm−1 for form II, respectively.