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Synthesis and Characterization of Ferrocene‐Containing Liquid Crystalline Materials with a Bromo‐phenyl Moiety †
Author(s) -
Zhao KeQing,
Hu Ping,
Xu HongBo,
Zhang LiangFu
Publication year - 2002
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20020200513
Subject(s) - chemistry , ferrocene , differential scanning calorimetry , mesogen , moiety , crystallography , condensation reaction , stereochemistry , phase (matter) , polymer chemistry , medicinal chemistry , liquid crystalline , organic chemistry , catalysis , electrochemistry , physics , electrode , thermodynamics
Ten ferrocene‐containing liquid crystalline materials, p ‐FcC 6 H 4 CO 2 C 6 H 4 N=CHC 6 H4O 2 CC 6 H 3 BrOC n H 2 n +1 (type I) and p ‐FcC 6 H 4 N=CHC 6 H4O 2 CC 6 H 3 BrOC n H 2 n +1 (type II), were synthesized by condensation reactions of two ferrocene‐substituted amines, p ‐FcC 6 H 4 CO 2 C 6 H 4 NH 2 (4) and p ‐FcC 6 H 4 NH 2 (5) (Fc: ferrocenyl) with five bromo‐substituted benzaldehydes (3) (H 2 n +1 C n OC 6 H 3 BrCOOC 6 H 4 CHO, 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.