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Three novel perylene Schiff-base derivatives 5a-5c were synthesized and characterized in yields of 80–85%. They exhibited reversible trans/cis isomerization after UV-light irradiation and heating. The fluorescence-enhancing effects were firstly observed for perylene trans-to-cis isomerization. The increasing steric hindrance based on the restricted intramolecular rotation of trans-to-cis isomerization...
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...
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