| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 175407 | Dyes and Pigments | 2016 | 8 Pages |
•Novel perylene liquid crystals with different bay-substituents were prepared.•They have good Colh mesophase and fluorescence properties.•They possess wide scopes of mesophase transfer temperatures.•The suitable bay-substituents were favorable for mesophase and fluorescence.
A series of perylene liquid crystals with H, Br, phenyl and tert-butylphenyl on bay-positions were synthesized in yields of 50–70%. Their mesomorphic properties and photophysical properties were investigated. The perylene derivatives 6, 7 and 8 with Br, phenyl and tert-butylphenyl at bay-positions have the hexagonal columnar liquid crystalline phase and wider scopes of phase transfer temperatures in comparison with similar perylene liquid crystal 5 with no substituent on bay-position. Compounds 6, 7 and 8 showed stronger fluorescence intensities, larger Stokes shifts and higher quantum yields than that of compound 5. These results indicated that the suitable substituents on bay-positions of perylene liquid crystals were favorable for producing excellent mesomorphic properties and good fluorescence properties.
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