Figure 3
13C {1H} CP/MAS NMR spectra of compound 1 at 30 °C (a,b), 60 °C (c,d) and 150 °C (e,f) observed during the first (water-crystallized, WC) and second (melt-crystallized, MC) heating runs. The numbers at each peak positions correspond to the carbons labeled for the model compound shown on top of the figure. Dotted lines are added to visualize the changes in the 13C chemical shift for the samples crystallized from water or melt at 30 °C and 150 °C. The changes in 13C chemical shift of compound 1 are summarized in Table S2 of the Supplementary Section.
