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dc.contributor.authorYang, Po-Jenen_US
dc.contributor.authorLin, Hong-Cheuen_US
dc.date.accessioned2014-12-08T15:16:46Z-
dc.date.available2014-12-08T15:16:46Z-
dc.date.issued2006-05-01en_US
dc.identifier.issn0267-8292en_US
dc.identifier.urihttp://dx.doi.org/10.1080/02678290600633394en_US
dc.identifier.urihttp://hdl.handle.net/11536/12340-
dc.description.abstractThree analogous series of symmetric banana-shaped liquid crystalline molecules containing bisnaphthyl units were synthesized and characterized. The effects of linking groups (on the side wings) and lateral meta-fluoro substitutions (on the middle outer rings) on the mesogenic properties were examined. The type of mesophase depends on the lengths of terminal alkoxy chains. Thus, achiral molecules with shorter flexible chains (n = 8) exhibit a rectangular columnar (B-1) phase, while analogous derivatives with longer flexible chains (n = 12) display the B-2 phase. All lateral meta-fluoro substituted analogues (series II) possess the lowest isotropization temperatures and the narrowest mesophasic ranges of the B-1 and B-2 phases. The B-1 and B-2 phases were confirmed by X-ray diffraction, polarizing optical microscopy (POM) and electro-optical (EO) switching experiments. An electric field-induced transition from an antiferroelectric (tristable) state to a ferroelectric (bistable) state was observed in the EO measurements. Spontaneous polarization (by switching current response), tilt angle of chiral domains (by POM), and transmittance -voltage measurements of the B-2 phase in related compounds have been surveyed in this study.en_US
dc.language.isoen_USen_US
dc.titleSynthesis and characterization of achiral banana-shaped liquid crystalline molecules containing bisnaphthyl moietiesen_US
dc.typeArticleen_US
dc.identifier.doi10.1080/02678290600633394en_US
dc.identifier.journalLIQUID CRYSTALSen_US
dc.citation.volume33en_US
dc.citation.issue5en_US
dc.citation.spage587en_US
dc.citation.epage603en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000239276300012-
dc.citation.woscount6-
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