PHOTOCONTROL OF ORIENTATION OF PHOTOCHROMIC DICHROIC DYES IN CHOLESTERIC POLYMER-FILMS

Strong LCICD (liquid-crystalline induced circular dichroism) was observed when a photochromic dichroic dye, 1, was doped into a cholesteric film of poly[(gamma-benzyl L-glutamate)-co-(gamma-dodecyl L-glutamate)]. The ICD at the absorption band of anthraquinone changed its intensity reversibly when t...

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Bibliographic Details
Published inMacromolecular chemistry and physics Vol. 196; no. 5; pp. 1419 - 1430
Main Authors NARISAWA, H, KISHI, R, SISIDO, M
Format Journal Article
LanguageEnglish
Published BASEL Huthig & Wepf Verlag 01.05.1995
Subjects
Physical Sciences
Polymer Science
Science & Technology
THERMOTROPIC POLYPEPTIDES
CHAIN
ARRANGED AZOBENZENE CHROMOPHORES
CIRCULAR-DICHROISM
MESOPHASE PROPERTIES
LIQUID-CRYSTALS
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Summary:Strong LCICD (liquid-crystalline induced circular dichroism) was observed when a photochromic dichroic dye, 1, was doped into a cholesteric film of poly[(gamma-benzyl L-glutamate)-co-(gamma-dodecyl L-glutamate)]. The ICD at the absorption band of anthraquinone changed its intensity reversibly when the azobenzene group was photoisomerized between cis and Irans form. The phenomenon was interpreted in terms of an orientational change of anthraquinone group associated with the photoisomerization of the azobenzene group. The structure-ICD relationship was investigated using several photochromic dichroic dyes with different anchoring groups on the azobenzene group and different spacers between the azobenzene and anthraquinone group.
ISSN:1022-1352
DOI:10.1002/macp.1995.021960505