Synthesis and Property of Dendrimers Having Peripherally Mesogenic Units

Poly(propyleneimine)-based liquid crystalline dendrimers (DCDs) with a relatively flexible dendritic scaffold were successfully prepared by Michael addition reaction of polypropylene-imine)s to 6-(2,3-dicyano-4-butoxyphenyloxy) hexyl acrylate(4). The structure of DCDs were characterized by IR, NMR a...

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Bibliographic Details
Published inMolecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals Vol. 364; no. 1; pp. 929 - 936
Main Authors Haba, Osamu, Okuyama, Ken-Ichi, Yonetake, Koichiro
Format Journal Article Conference Proceeding
LanguageEnglish
Published Philadelphia, PA Taylor & Francis Group 01.08.2001
Gordon and Breach
Subjects
2,3-Dicyanophenyl-1,4-diylene
Acrylate
Applied sciences
Chemical modifications
Chemical reactions and properties
Dendrimer
Exact sciences and technology
Michael Addition
Organic polymers
Physicochemistry of polymers
Poly(propylene imine)
Smectic
Acrylic acid ester
Michael addition
End group
Branched polymer
Propyleneimine polymer
Thermotropic state
Mesomorphic state structure
Experimental study
Phase transitions
Chemical modification
Liquid crystal polymers
Preparation
Dendritic structure
Dinitrile
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Summary:Poly(propyleneimine)-based liquid crystalline dendrimers (DCDs) with a relatively flexible dendritic scaffold were successfully prepared by Michael addition reaction of polypropylene-imine)s to 6-(2,3-dicyano-4-butoxyphenyloxy) hexyl acrylate(4). The structure of DCDs were characterized by IR, NMR and MALDI-TOF mass spectroscopies. Liquid crystallinity were examined by DSC, polarized optical microscope, and X-ray diffraction methods. DCDs exhibited a smectic liquid-crystalline phase. The polar terminal 2,3-dicyanophenylene group gave a liquid crystalline properties to DCDs.
ISSN:1058-725X
DOI:10.1080/10587250108025066