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The effects of alkylthio chains on the properties of symmetric liquid crystal dimers

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dc.abstract.enThe synthesis and characterisation of four series of symmetric liquid crystal dimers containing either alkylthio or alkyloxy terminal chains are reported. The (E,E)-[pentane-1,5-diylbis(oxy-4,1-phenylene)]bis{N-[4-(alkyloxy)phenyl]methanimine}s, mO.O5O.Om and (E,E)-[hexane-1,6-diylbis(oxy-4,1-phenylene)]bis{N-[4-(alkyloxy)phenyl]methanimine}s, mO.O6O.Om series are nematogenic when the terminal chains are short whereas the higher homologues show the smectic A phase. The mO.O6O.Om series shows higher clearing temperatures regardless of the terminal chain length. The (E,E)-[pentane-1,5-diylbis(oxy-4,1-phenylene)]bis{N-[(alkylthio)phenyl]methanimine}s, mS.O5O.Sm series is solely nematogenic, and does not show liquid crystallinity when m ≥ 5. The (E,E)-[hexane-1,6-diylbis(oxy-4,1-phenylene)]bis{N-[(alkylthio)phenyl]methanimine}s, mS.O6O.Sm series, however, shows mesogenic behavior over the entire series, with the smectic C phase only emerging when the terminal chain is long, m ≥ 8. In general, for a given spacer length, the dimers containing alkyloxy chains show the highest clearing temperatures and the alkylthio chains the lowest. For the shortest terminal chains, however, the nematic–isotropic transition temperatures of the alkylthio materials are higher than those containing the alkyl chain. This behaviour is rather general and discussed in terms of steric and electronic interactions.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorMajewska, Magdalena
dc.contributor.authorImrie, Corrie T.
dc.contributor.authorStorey, John M. D.
dc.contributor.authorGórecka, Ewa
dc.contributor.authorPociecha, Damian
dc.contributor.authorStrachan, Grant J.
dc.contributor.authorCruickshank, Ewan
dc.date.accessioned2024-01-26T10:11:04Z
dc.date.available2024-01-26T10:11:04Z
dc.date.copyright2023-03-20
dc.date.issued2023
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number15
dc.description.versionFINAL_PUBLISHED
dc.description.volume47
dc.identifier.doi10.1039/D2NJ06252F
dc.identifier.issn1144-0546
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122157
dc.identifier.weblinkhttp://pubs.rsc.org/en/content/articlepdf/2023/NJ/D2NJ06252F
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofNew Journal of Chemistry
dc.relation.pages7356-7368
dc.rightsCC-BY-NC
dc.sciencecloudnosend
dc.titleThe effects of alkylthio chains on the properties of symmetric liquid crystal dimers
dc.typeJournalArticle
dspace.entity.typePublication