Liquid crystalline behavior of tetraaryl derivatives of benzo [c] cinnoline, tetraazapyrene, phenanthrene, and pyrene: the effect of heteroatom and substitution pattern …

…, JM Farrar, F Zhang, S Kusuma, PA Heiney…

Index: Sienkowska, Monika J.; Farrar, John M.; Zhang, Fan; Kusuma, Sharat; Heiney, Paul A.; Kaszynski, Piotr Journal of Materials Chemistry, 2007 , vol. 17, # 14 p. 1399 - 1411

Full Text: HTML

Citation Number: 35

Abstract

A series of closely related tetrasubstituted derivatives of benzo [c] cinnoline (1), tetraazapyrene (2), phenanthrene (3), and pyrene (4) were investigated for their mesogenic properties using thermal, optical, spectroscopic, and powder XRD analyses. Only three 3, 4- dioctyloxyphenyl derivatives exhibited mesogenic properties. Substitution of N for CH (3→ 1 and 4→ 2 pairs) and also increase of the core element size (1→ 2 and 3→ 4 pairs) ...