6533b81ffe1ef96bd1278ef9

RESEARCH PRODUCT

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Wolfgang KnollHelmut RingsdorfM. SawodnyC. Urban

subject

Acrylate polymerchemistry.chemical_compoundAzo compoundchemistryAzobenzeneLiquid crystalMesogenPolymer chemistrySide chainMesophasePendant group

description

A series of liquid-crystalline copolymers 1 with a chiral azobenzene moiety as photoreactive mesogenic unit was prepared. The polymers were fractionated and the mesophase behaviour of the high- and low-molecular weight fractions was examined. The copolymers display smectic A and cholesteric phases. For the cholesteric phases the pitch of the helix was determined, which ranges from 3 to 20 μm. Stable monolayers at the air-water interface were obtained from two monomers and one of the homopolymers. Multilayer assemblies of the azobenzene-containing polymers can be used to study photo-induced order/disorder transitions.

https://doi.org/10.1002/macp.1992.021930520