Novel perylene liquid crystals: Investigation of the influence of bay-substituents on mesomorphism and photophysical property. (October 2016)

• Record Type: Journal Article
• Authors: Zhu, Mingguang; Guo, Hongyu; Yang, Fafu; Wang, Zusheng
• Is Part Of: Dyes and pigments. Volume 133(2016)
• Page Start: 387
• Page End: 394
• Publication Date: 2016-10
• Subjects: Perylene -- Synthesis -- Bay-substituent -- Mesophase -- Fluorescence; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2016.06.021
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: 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. Graphical abstract: Highlights: 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.