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Synthesis of symmetric and asymmetric carbazolyl monomers and their siloxane polymers. Effect of the 2,3,6,7,9‐substitution in the carbazole unit on its mesomorphic behaviour by Alicia Dobarro; Dolores Velasco; Volkmar v. Arnim; Heino Finkelmann is a Materials Science article available to read on EtoBox.

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## Abstract A general synthetic route toward symmetric and asymmetric side‐on and end‐on carbazolyl monomers has been developed. The effect of the nature of the core on the induction of liquid‐crystal phases in side‐on carbazolyl polysiloxanes has been studied. Chromophores have been introduced into the carbazole core to produce materials with improved second‐order non‐linear optical (NLO) properties. The mesomorphic behaviour of all the polymers has been investigated by optical microscopy, differential scanning calorimetry (DSC) and X‐ray diffraction. The side‐on polymers are isothropic or crystalline except one of them that presents a metastable nematic phase.

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Author

Alicia Dobarro; Dolores Velasco; Volkmar v. Arnim; Heino Finkelmann

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1022-1352)

Published

1997

Language

EN

Field

Materials Science (Physical Sciences)