Azo polymers for reversible optical storage: 12. Poly{1-acryloyl-4-[4-(4-nitrophenylazo)phenyl] piperazine}

Meng, Xian Sheng; Natansohn, Almeria; Rochon, P.

doi:10.1016/s0968-5677(96)00039-9

Cited by 31 publications

(25 citation statements)

References 9 publications

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“…[93] The polymers had unusually high glass transition temperatures of 169 C and 208 C for poly((S)-MAP) (6g) and poly((S)-MAP-N) (6h), respectivelyÐtemperatures much higher than comparable methacrylic polymers, and above the 160 C temperature desired for NLO applications. [95,101,102] Further, the functional group on the azobenzene was changed by polymerizing (S)-3- …”

Section: Chiral Aromatic Chromophore Substituentsmentioning

confidence: 99%

Chiral Polyolefins

Hopkins

Wagener²

2002

Adv. Mater.

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The synthesis and optical properties of a variety of chiral polyolefins are reviewed. The polymers are separated into four categories: hydrocarbon‐based chiral polyolefins, chiral polyolefins from achiral monomers, chiral polyolefins with aromatic side chains, and chiral polyolefins bearing branched amino acids. The polymers were synthesized using Ziegler–Natta, anionic, radical, and acyclic diene metathesis (ADMET) polymerization techniques.

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Section: Chiral Aromatic Chromophore Substituentsmentioning

confidence: 99%

Chiral Polyolefins

Hopkins

Wagener²

2002

Adv. Mater.

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“…When exposed to a linearly polarized light of a proper wavelength azobenzene moieties tend to orient perpendicularly to the polarization direction, as a result of multiple trans-cis-trans isomerization cycles. However, the generated azochromophore orientation may not be sufficiently stable due to the disordering processes including the azochromophore and the main chain motions [16]. Nevertheless, a proper architecture of a backbone, an azochromophore and a type of their linkage may lead to an improvement in temporal and thermal stabilities of the generated chromophore orientation.…”

Section: Introductionmentioning

confidence: 99%

Poly(esterimide) bearing azobenzene units as photoaligning layer for liquid crystals

et al. 2015

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“…It is worth noting that a great number of publications which deal with photoorientation processes are devoted to azobenzene‐containing polymer systems 14–29. Of special interest are nematic liquid crystalline polymers with azobenzene side groups, because they offer a few advantages over ones based on amorphous polymers.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Photoorientation Phenomena in Cholesteric Polymer Systems Containing Photochromic Diarylethene Derivatives

Medvedeva

Bobrovsky

Boiko

et al. 2006

Macro Chemistry & Physics

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Photoorientation processes in two cholesteric mixtures were studied. Mixture I contained a nematogenic phenylbenzoate homopolymer, a photochromic diarylethene dopant and a chiral dopant. Mixture II consisted of a binary comb-shaped nematogenic copolymer with fluorescent perylene side groups and the same chiral and photochromic dopants. Irradiation of the mixtures with a polarized UV light did not induce photoorientation of the photoinduced ''closed'' form of the diarylethene dopant. However, the action of a polarized visible light on films of mixtures irradiated with UV light led to the appearance of dichroism.This phenomenon is associated with the photoselection process of the photochromic diarylethene molecules in the cholesteric matrix. An investigation of the kinetics of the photosensitized back photoreaction of the photochromic molecules in the cholesteric mixture showed that the polarized energy transfer from the fluorescent groups to the photochromic diarylethene dopant caused an increase in the photoselection rate. The thermal stability of dichroism in films of the mixtures was studied and it was shown that the disappearance of the dichroism of the diarylethene molecules occurred with a noticeable rate even at room temperature.Scheme of photophysical and photochemical processes under the indirect excitation of diarylethene molecules.

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Azo polymers for reversible optical storage: 12. Poly{1-acryloyl-4-[4-(4-nitrophenylazo)phenyl] piperazine}

Cited by 31 publications

References 9 publications

Chiral Polyolefins

Chiral Polyolefins

Poly(esterimide) bearing azobenzene units as photoaligning layer for liquid crystals

A Study of the Photoorientation Phenomena in Cholesteric Polymer Systems Containing Photochromic Diarylethene Derivatives

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