Benzenehexacarboxylates with bulky alcohol moieties showed bulkiness-dependent dual fluorescence peaks with both small and substantial Stokes shifts, which are attributed to the decelerated conformational relaxation in the excited state due to steric hindrance between the adjacent bulky alcohol moieties.
Y. Inoue, N. Yamasaki, T. Yokoyama, A. Tai, A. Ishida and S. Takamuku, J. Chem. Soc., Chem. Commun., 1989, 1270 DOI: 10.1039/C39890001270
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