Perylene particle size

As an example, the crystal growth of P.R.179 can be drastically inhibited (Figure 8-15) by the addition of a few percent of perylene dicarboxylic acid imide (PDCI) . The changes in particle size are accompanied by significant modifica-... 

Since perylene pigments are only sparingly soluble in common solvents, the solvent conditioning of crudes is commonly done under harsh conditions. For example, a common method to adjust the particle size and morphology of a perylene... 

The ground state absorption spectrum of the Qg fine particles is quite broad compared to the isolated Qg in toluene. The spectral features of the Qg fine particles are similar to those of the Qg bulk crystals. These findings indicate that substantial interactions are present between the 60 molecules in the fine particles. It is interesting to note that the absorption peak of the 60 fine particles shifts to the shorter wavelength side compared to that of the Qg bulk crystal. The shift of the absorption peak will indicate the size effect of the fine particles as observed with the fine crystals of perylene [91]. 

---