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Ten ferrocene containing liquid crystalline materials, p FcC 6H 4CO 2C 6H 4N=CHC 6H 4O 2CC 6H 3BrOC n H 2 n +1 (type I) and p FcC 6H 4N=CHC 6H 4O 2CC 6H 3BrOC n H 2 n +1 (type II), were synthesized by condensation reactions of two ferrocene substituted amines, p FcC 6H 4CO 2C 6H 4NH 2 (4) and p FcC 6H 4NH 2 (5) (Fc: ferrocenyl) with five bromo substituted benzaldehydes (3) (H 2 n +1 C n OC 6H 3BrCOOC 6H 4CHO, n =2, 4, 6, 8 and 10). Their mesogenic behaviors were studied by hot stage polarized optical microscopy and differential scanning calorimetry. The effects of structure (rigid core, terminal chain length) on the phase transition behaviors were discussed.
Ten ferrocene containing liquid crystalline materials, p FcC 6H 4CO 2C 6H 4N = CHC 6H 4O 2CC 6H 3BrOC n H 2 n +1 (type I) and p FcC 6H 4N = CHC 6H 4O 2CC 6H 3BrOC n H 2 n +1 ( type II), were synthesized by the condensation reaction of two ferrocene substituted amines, p FcC 6H 4CO 2C 6H 4NH 2 (4) and p FcC 6H 4NH 2 (5) (Fc: ferrocenyl) with five bromo substituted benzaldehydes 2 n +1 C n OC 6H 3BrCOOC 6H 4CHO, n = 2, 4, 6, 8 and 10). Their mesogenic behaviors were studied by hot stage polarized optical microscopy and differential scanning calorimetry. The effects of structure (rigid core, terminal chain length) on the phase transition behaviors were discussed.