Ge. Hoyle et al., SOLVENT EFFECT ON THE PHOTOPHYSICS OF BISPHENOL-A-BASED POLYCARBONATEAND DIPHENYLCARBONATE, Canadian journal of chemistry, 73(11), 1995, pp. 2062-2068
Polycarbonate and diphenylcarbonate exhibit an anomalous fluorescence
emission with peak maximum around 350 nm in polar solvents that may be
attributed to the association of diarylcarbonate moieties in a polar
solvent cage. The red-shifted emission is attributed to intermolecular
interactions in polar solvents and intramolecular interactions in pol
ycarbonate. The photophysical behavior of polycarbonate and diphenylca
rbonate is different from that of 1,3-diphenylpropane where a red-shif
ted emission is due to excimers formed by phenyl groups separated by t
hree carbon atoms and is independent of the polarity of the solvent.