“…Small angle X ray scattering (SAXS) and X ray diffraction (XRD) analysis of the neat liquid samples show that the average distance between the isolated π conjugated units is, for example, 2.1 nm for 21 (Figure 6e). 9 This is due to the bulky substituents which effectively disturb the anthracene core core (π π) interaction. Such molecular design brings a kind of bonus, photo stability; there is no dimerization and relatively slow photo oxidation, about 10 times slower than that of the bare anthracene unit (speci cally, diphenylanthracene), under 365 nm ltered Xe light irradiation.…”