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Photo-induced molecular alignment of trisazobenzene derivatives

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00004768
URN to cite this document: urn:nbn:de:bvb:703-epub-4768-6

Title data

Wolfer, Pascal ; Audorff, Hubert ; Kreger, Klaus ; Kador, Lothar ; Schmidt, Hans-Werner ; Stingelin, Natalie ; Smith, Paul:
Photo-induced molecular alignment of trisazobenzene derivatives.
In: Journal of Materials Chemistry. Vol. 21 (2011) Issue 12 . - pp. 4339-4345.
ISSN 0959-9428
DOI der Verlagsversion: https://doi.org/10.1039/c0jm03477k

Project information

Project title:
Project's official titleProject's id
Komplexe Makromolekül- und Hybridsysteme in inneren und äußeren FeldernSFB481

Project financing: Deutsche Forschungsgemeinschaft

Abstract

Optically active small-molecular trisazobenzene derivatives are explored that allow facile photo-induced fabrication of holographic volume gratings which are unusually stable over time compared to structures based on other small-molecular organic compounds. The origin of this favorable characteristic of such architectures is investigated with three compounds that structurally differ only in the length of an alkyl spacer positioned between the molecular core and the active azobenzene chromophores. Species comprising spacers of sufficient length, and that exhibit a latent liquid-crystalline phase, feature efficient formation of stable, ordered domains in which the three side groups orient perpendicular to the polarization of the inscribing light beam. It is demonstrated that molecular order in these domains can be significantly improved by annealing at temperatures between the glass transition temperature and the clearing point of the specific compounds. This phenomenon allows combining the highly desirable processing characteristic of relatively short holographic writing times with small molecules in the fabrication of stable volume gratings, the latter feature so far having been reserved predominantly for polymeric species.

Further data

Item Type: Article in a journal
Additional notes (visible to public): ISI:000288220600050
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I > Chair Macromolecular Chemistry I - Univ.-Prof. Dr. Hans-Werner Schmidt
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Research Institutions
Research Institutions > Research Centres
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-4768-6
Date Deposited: 03 Sep 2020 08:33
Last Modified: 03 Sep 2020 08:33
URI: https://epub.uni-bayreuth.de/id/eprint/4768

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