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Liquid crystalline main‐chain polymers containing the ferrocene unit as a side group
Author(s) -
Wilbert Götz,
Zentel Rudolf
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021971016
Subject(s) - ferrocene , polymer chemistry , side chain , polymer , chain (unit) , chemistry , group (periodic table) , unit (ring theory) , pendant group , end group , polymer science , materials science , organic chemistry , polymerization , electrochemistry , physics , electrode , mathematics education , mathematics , astronomy
We have incorporated three new diethyl ω‐ferrocenylalkylmalonates into a smectic liquid crystalline main‐chain polymer in contents of about 10 mol‐%. As mesogenic unit 4,4′‐bis(6‐hydroxyhexyloxy)azoxybenzene was used as diol component and diethyl phenylmalonate as diacid component. Three ferrocene‐containing polymers were investigated in the oxidized and non‐oxidized state of the ferrocene unit varying the counterion. DSC data show a shift toward higher phase transition temperatures after oxidation, which increases with the length of the alkyl spacer between main chain and ferrocene unit. X‐ray measurements of the non‐oxidized species show an unusual increase of the smectic layer thickness with increasing length of the alkyl spacer.