Crystal structures of 2,3,6,7,10,11-oxytriphenylenes. Implications for columnar discotic mesophases

T.L. Andresen, Frederik C Krebs, Niels Thorup, K. Bechgaard

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The structures of the oxysubstituted triphenylene premesogens, 2,3,6,7,10,11-hexahydroxy-triphenylene (4), 2,3,6,7,10,11-hexamethoxytriphenylene (5), 2,3,6,7,10,11-hexaethoxytriphenylene (6), and 2,3,6,7,10,11-hexapropoxytriphenylene (7) were determined, and the structural results were investigated in the aim that a detailed structural knowledge of the discotic premesogens could be used to infer detailed structural knowledge with respect to known liquid crystal mesogens where little detailed structural knowledge is available. It was found that the crystal structures of the discotic premesogens were very different from the structures expected for discotic columnar behavior. These differences allowed us to shed some light on the structural forces that gives rise to the mesophasic behavior observed in such systems as being not due to stacking of the planar aromatic core as inferred hitherto but rather governed by the alkyl groups.
    Original languageEnglish
    JournalChemistry of Materials
    Volume12
    Issue number8
    Pages (from-to)2428-2433
    ISSN0897-4756
    DOIs
    Publication statusPublished - Aug 2000

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