Effect of micelle size and intermicellar distance on the chirality transfer in the intrinsic lyotropic cholesteric phases

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dc.authorid0000-0002-9974-9470en_US
dc.authorid0000-0002-9854-5177en_US
dc.contributor.authorAkpınar, Erol
dc.contributor.authorGiesselmann, Frank
dc.contributor.authorAcımış, Mahmut
dc.date.accessioned2021-06-23T19:34:19Z
dc.date.available2021-06-23T19:34:19Z
dc.date.issued2013
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Kimya Bölümüen_US
dc.description.abstractLyotropic nematic and cholesteric liquid crystalline phases were produced using the racemic amphiphiles, potassium N-dodecanoyl-DL-alaninate (DL-KDDA) and DL-serinate (DL-KDDS) and their l-enantiomers, potassium N-dodecanoyl- L-alaninate (L-KDDA) and L-serinate (l-KDDS), respectively. The different racemic nematic and cholesteric phases were characterised by a polarising light microscope. In order to calculate the helical twisting powers (htp) of the cholesteric phases, their pitches were determined as a function of concentrations of the L-enantiomers. The results showed that the L-KDDA system had a higher helical twisting power than the L-KDDS system. Small-angle X-ray scattering (saxs) techniques were performed for determination of the structural differences between the racemic micelles and the chiral micelles of the racemic and intrinsic cholesteric phases, respectively. Saxs results showed that the intrinsic cholesteric micelles are more compact than their corresponding racemic micelles. These results were interpreted in terms of the different molecular arrangements of the chiral amphiphiles in micelles compared to the amphiphiles in racemic micelles. According to our experimental results and the results on induced cholesteric phases in the literature, we proposed that there must be (1) a crucial distance and (2) a critical micelle size in order to obtain chiral induction, supporting some theoretical studies reported in the literature. In addition, we also showed that chiral induction does not take place completely as was suggested by pairwise interaction or sterical interaction models in the literature, but through anisotropic chiral interactions via distorted micelles for which a crucial distance between the micelles and a critical micelle size are required.en_US
dc.identifier.doi10.1080/02678292.2013.807941
dc.identifier.endpage1194en_US
dc.identifier.issn0267-8292
dc.identifier.issn1366-5855
dc.identifier.issue9en_US
dc.identifier.scopus2-s2.0-84881668385en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage1183en_US
dc.identifier.urihttps://doi.org/10.1080/02678292.2013.807941
dc.identifier.urihttps://hdl.handle.net/20.500.12491/7466
dc.identifier.volume40en_US
dc.identifier.wosWOS:000322764500005en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorAkpınar, Erol
dc.institutionauthorAcımış, Mahmut
dc.language.isoenen_US
dc.publisherTaylor & Francis Ltden_US
dc.relation.ispartofLiquid Crystalsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectChiral Inductionen_US
dc.subjectRacemic Nematic Phaseen_US
dc.subjectCholesteric Phaseen_US
dc.subjectDL-racemic Mixtureen_US
dc.subjectL-enantiomeren_US
dc.subjectSaxsen_US
dc.subjectLaser Diffractionen_US
dc.subjectPitchen_US
dc.subjectHelical Twisting Poweren_US
dc.subjectRacemic Micelleen_US
dc.subjectChiral Micelleen_US
dc.subjectIntermicellar Interactionsen_US
dc.titleEffect of micelle size and intermicellar distance on the chirality transfer in the intrinsic lyotropic cholesteric phasesen_US
dc.typeArticleen_US

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