Synthesis and Photophysical Properties of Dimethoxybis(3,3,3-trifluoropropen-1-yl)benzenes: Compact Chromophores Exhibiting Violet Fluorescence in the Solid State
4‐(MeO)2‐2,5‐[(E)‐CF3CH=CH]2 benzene ((E)‐3) ended at 406 nm. These findings indicate that the effective conjugation length of (E)‐3 was significantly larger than those of 1 and 2. Consistently, 1 and 2 in cyclohexane exhibitedfluorescence with emission maxima in the UV region, whereas (E)‐3 in cyclohexane emitted violet light with an emission maximum at 407 nm. All the fluorescence spectra of 1–3 in various