Figure 3: UV-Vis spectra of selected heteroacenes. | Nature Communications

Figure 3: UV-Vis spectra of selected heteroacenes.

From: Effects of electronegative substitution on the optical and electronic properties of acenes and diazaacenes

Figure 3

(a) Long-wavelength normalized UV-Vis spectra in hexane; R=TIPS in all cases. (b) Photograph of solutions of heteroacenes in hexane. The combined effects of annulation and halogenation lead to a shift of absorption from 571 to 758 nm. The spectrum of 15b is almost superimposable onto that of 15c. The halo-substitution in both tetracenes and in pentacenes leads to significant redshifts in absorption. Chlorine and bromine substituents are equally effective. The UV-Vis spectrum of 7 was taken from Miao et al.13

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