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  Tetrabenzocyclododecatetraene : a new core for mesogens exhibiting columnar mesophases

Zimmermann, H., Poupko, R., Luz, Z., & Billard, J. (1988). Tetrabenzocyclododecatetraene: a new core for mesogens exhibiting columnar mesophases. Liquid Crystals, 3(6-7), 759-770. doi:10.1080/02678298808086532.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0019-AE65-D Version Permalink: https://hdl.handle.net/21.11116/0000-000A-6F22-4
Genre: Journal Article

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LiqCryst_3_1988_795.pdf (Any fulltext), 2MB
 
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 Creators:
Zimmermann, Herbert1, 2, 3, 4, Author           
Poupko, Raphy, Author
Luz, Zeev, Author
Billard, Jean, Author
Affiliations:
1Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society, ou_1497705              
2Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society, ou_1497700              
3Zimmermann Group, Max Planck Institute for Medical Research, Max Planck Society, ou_1497749              
4Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society, ou_1497712              

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 Abstract:
Octasubstituted derivatives of tetrabenzocyclododecatetraene are found to exhibit thermotropic mesophases. The molecules of these mesogens are highly flexible with an average four-fold symmetry. Optical and differential scanning calorimetry measurements are presented on five ester and ether derivatives. All mesophases appear to be columnar with a negative optical anisotropy. From the five compounds studied the four which are derived from aliphatic ester and ether are optically uniaxial, while the mesophase of the decylbenzoyloxy derivative could be biaxial. Miscibility measurements performed with some discotic and pyramidic mesogens of similar molecular dimensions suggest that the mesophases of the tetrabenzocyclododecatetraene core form new families of columnar mesophases.

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Language(s): eng - English
 Dates: 2007-09-251988
 Publication Status: Issued
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1080/02678298808086532
 Degree: -

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Title: Liquid Crystals
Source Genre: Journal
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Publ. Info: London : Taylor & Francis
Pages: - Volume / Issue: 3 (6-7) Sequence Number: - Start / End Page: 759 - 770 Identifier: ISSN: 0267-8292
CoNE: https://pure.mpg.de/cone/journals/resource/954925268301