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  Mesomorphic properties of the neat enantiomers of a chiral pyramidic liquid crystal

Luz, Z., Poupko, R., Wachtel, E. J., & Zimmermann, H. (2009). Mesomorphic properties of the neat enantiomers of a chiral pyramidic liquid crystal. Physical Chemistry Chemical Physics, 11(41), 9562-9568. doi:10.1039/b908029p.

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Datensatz-Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-11AA-0 Versions-Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-11AB-E
Genre: Zeitschriftenartikel
Alternativer Titel : Mesomorphic properties of the neat enantiomers of a chiral pyramidic liquid crystal

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PhysChemChemPhys_11_2009_ 9562.pdf (beliebiger Volltext), 247KB
 
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http://pubs.rsc.org/en/content/articlepdf/2009/cp/b908029p (beliebiger Volltext)
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https://dx.doi.org/10.1039/B908029P (beliebiger Volltext)
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 Urheber:
Luz, Zeev, Autor
Poupko, Raphy, Autor
Wachtel, Ellen J., Autor
Zimmermann, Herbert1, 2, Autor              
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              

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 Zusammenfassung: The crown form of nona-octanoyloxy tribenzocyclononatriene (C8) with C(3) symmetry was prepared and separated into its enantiomers (C8A and C8B) by HPLC. Like the racemate, the neat enantiomers are also mesogenic, exhibiting two mesophases, M and Col(h). Differential scanning calorimetry, X-ray diffraction, carbon-13 NMR and UV circular dichroism are used to study the structural and dynamic properties of these chiral mesophases. The high-temperature mesophase (Col(h)) was identified by X-ray diffraction as columnar hexagonal; this phase is thermally unstable, undergoing racemization on heating before its clearing point is reached. The low-temperature mesophase (M) is most likely also columnar, but its symmetry could not be determined. In comparison with the racemate, the chiral mesophases are less well ordered, more tightly packed and they have a lower tendency to crystallize. On the other hand they are considerably more mobile, as reflected in their NMR spectra. No helical structure has been identified in the X-ray diffraction of the mesophases.

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Sprache(n): eng - Englisch
 Datum: 2009-04-212009-07-282009-08-202009-11-07
 Publikationsstatus: Im Druck publiziert
 Seiten: 7
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 664612
DOI: 10.1039/b908029p
URI: http://www.ncbi.nlm.nih.gov/pubmed/19830342
Anderer: 7529
 Art des Abschluß: -

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Titel: Physical Chemistry Chemical Physics
  Kurztitel : Phys. Chem. Chem. Phys.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Cambridge, England : Royal Society of Chemistry
Seiten: - Band / Heft: 11 (41) Artikelnummer: - Start- / Endseite: 9562 - 9568 Identifikator: ISSN: 1463-9076
CoNE: /journals/resource/954925272413_1