Title
High birefringence lateral difluoro phenyl tolane liquid crystals
Abbreviated Journal Title
Liq. Cryst.
Keywords
high birefringence; negative dielectric anisotropy; liquid crystals; NEGATIVE DIELECTRIC ANISOTROPY; REFRACTIVE-INDEX DISPERSIONS; MESOMORPHIC PROPERTIES; DIPHENYL-DIACETYLENE; TRANSITION-TEMPERATURES; PHYSICAL-PROPERTIES; DERIVATIVES; Chemistry, Multidisciplinary; Crystallography; Materials Science, ; Multidisciplinary
Abstract
Four laterally difluorinated phenyl tolane liquid crystals were synthesised and their physical properties evaluated. These compounds exhibit a fairly small heat fusion enthalpy (Delta H similar to 12.56 kJ mol(-1)), which is favourable for mixture formulations. For comparison, four lateral difluoro cyclohexane tolane homologues are also studied. We doped 10 wt% of each compound into a commercial negative mixture N1 and measured the birefringence, visco-elastic coefficient and figure of merit. Birefringence varies very little between homologues, but the visco-elastic coefficient increases as alkyl chain length increases. The refractive indices of these guest-host mixtures at 1550 nm are also measured.
Journal Title
Liquid Crystals
Volume
37
Issue/Number
2
Publication Date
1-1-2010
Document Type
Article
Language
English
First Page
139
Last Page
147
WOS Identifier
ISSN
0267-8292
Recommended Citation
"High birefringence lateral difluoro phenyl tolane liquid crystals" (2010). Faculty Bibliography 2010s. 815.
https://stars.library.ucf.edu/facultybib2010/815
Comments
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