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Cholesterol-based photo-switchable mesogenic dimers. Strongly bent molecules versus an intercalated structure

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cris.lastimport.scopus2024-02-12T20:05:00Z
dc.abstract.enHerein, a homologous series of cholesterol-based liquid crystalline bent-shaped dimers with different lengths of a terminal alkoxy chain were synthesized and characterized by polarizing optical microscopy, differential scanning calorimetry, and powder and single-crystal X-ray diffraction. The photosensitivity of the mesogenic molecules provides an opportunity to manipulate the structure of the liquid crystalline phase using light. The compound with the shortest alkoxy tail exhibited the heliconical twist-bend nematic phase. Elongation of the terminal alkoxy chain prevented the formation of the Ntb phase; for compounds with longer tails, instead of the Ntb phase, SmA was observed, which was rather unique for bent-shaped dimeric mesogens. The crystal structures presented herein shed new light on the possible molecular conformations and arrangements of molecules in the liquid crystalline phase. We have shown that in addition to the model of intercalated molecules, special attention should be paid to the model of strongly bent molecules. A new model of the molecular packing of bent-shaped dimers with flexible linkers in the SmA phase is proposed.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorPruszkowska, Kamila
dc.contributor.authorSęktas, Katarzyna
dc.contributor.authorSiciński, Rafał
dc.contributor.authorZep, Anna
dc.contributor.authorCyrański, Michał
dc.contributor.authorSzałański, Piotr
dc.contributor.authorDobrzycki, Łukasz
dc.contributor.authorMarek-Urban, Paulina
dc.date.accessioned2024-01-24T19:23:57Z
dc.date.available2024-01-24T19:23:57Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.number17
dc.description.volume21
dc.identifier.doi10.1039/C9CE00013E
dc.identifier.issn1466-8033
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/103028
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofCrystEngComm
dc.relation.pages2779-2789
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleCholesterol-based photo-switchable mesogenic dimers. Strongly bent molecules versus an intercalated structure
dc.typeJournalArticle
dspace.entity.typePublication