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dc.contributor.authorVIJ, JAGDISHen
dc.date.accessioned2008-06-24T11:53:12Z
dc.date.available2008-06-24T11:53:12Z
dc.date.issued2007en
dc.date.submitted2007en
dc.identifier.citationSigarev, A.A., Vij, J.K., Hall, A.W., Cowling, S.J., Goodby, J.W. , Molecular orientational properties of a high-tilt chiral smectic liquid crystal determined from its infrared dichroism , Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 76, 5, 2007, 051707en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/17661
dc.descriptionPUBLISHEDen
dc.descriptionArticle number 051707 13 ppen
dc.description.abstractThe orientational characterisitics and the temperature dependencies of the molecular apparent tilt angle of a partly fluorinated chiral smectic liquid crystal (/S/)-4-(1-methylheptyloxycarbonyl)phenyl 4-[6-(3,4,4,4-tetrafluoro-3-trifluoromethylbutylcarbonyloxy)hexyloxy] biphenyl-4-carboxylate (acronym MHPHFHHOBC) are studied using the polarized Fourier transform infrared (FTIR) spectroscopy. The molecular orientational distributions and the orientational order parameters for a homogeneously aligned liquid crystalline sample at various temperatures and external electric fields are examined. The analysis uses the dichroic parameters of the phenyl and the carbonyl bands. For a temperature range of 65?80 ?C corresponding to the antiferroelectric SmCA* phase, the molecular apparent tilt angle lies within the range 43??44?; antiferroelectric smectic structure being rather close to the orthoconic SmCA* phase. An application of sufficiently high dc field across the cell in its SmA* phase surprisingly shows that the dichroism first increases slowly and then rapidly in two stages and finally a saturated apparent tilt angle of ~30? is reached. The IR dichroic data is used to estimate the polar angles and the degree of rotational biasing of the carbonyl groups with respect to the molecular long axis. In the SmA* phase, the sample appears to demonstrate some of the typical properties of a de Vries material.en
dc.description.sponsorshipThe work was supported by the SFI Contract No. 02/In.1/I031 .en
dc.format.extent051707en
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.relation.ispartofseriesPhysical Review E - Statistical, Nonlinear, and Soft Matter Physicsen
dc.relation.ispartofseries76en
dc.relation.ispartofseries5en
dc.rightsYen
dc.subjectElectronic & Electrical Engineeringen
dc.titleMolecular orientational properties of a high-tilt chiral smectic liquid crystal determined from its infrared dichroismen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/jvijen
dc.identifier.rssinternalid51805en
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevE.76.051707en
dc.identifier.rssurihttp://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PLEEE8000076000005051707000001&idtype=cvips&prog=normalen


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