Synthesis of Fluorosubstituted Three Ring Esters and Their Dielectric Properties

Abstract

Laterally substituted by fluorine atoms 4-cyanophenyl 4-(4-pentylbenzoyloxy)-benzoates have been prepared and their phase transition temperatures, enthalpies and dielectric properties upon frequency were evaluated. The novel compounds exhibit a broad range of nematic mesophase, large positive dielectric anisotropy changing sign at low frequency. They are convenient components of LC mixtures for dual frequency addressing devices.

Keywords:

• cyano and fluorosubstituted ester
• dual-frequency addressing
• high positive dielectric anisotropy
• liquid crystal
• nematic

Acknowledgments

The work was supported by the Polish Ministry of Science and Higher Education, grant N204 029 31/0512 and no. 765 PBS project.

Notes

^#monotropic phase.