Comparison of Racemic and Enantiomeric 4′-(1-Methylheptyloxycarbonyl)Biphenyl-4-yl 4-[3-(2,2,3,3,4,4,4-Heptafluorobutoxy)Prop-1-Oxy]Benzoates

Abstract

Four racemic compounds (R, S)-4′-(1-methylheptyloxycarbonyl)biphenyl-4-yl 4-[3-(2,2,3,3,4,4,4-heptafluorobutoxy)prop-1-oxy]benzoates were synthesized and characterized. Their mesomorphic properties, such as phase transitions temperatures and enthalpies were measured by polarizing optical microscope and differential scanning calorimetry. The example of mixture containing racemic components and its properties is presented.

Keywords:

• Anticlinic smectic mixture
• enthalpies
• helical pitch
• orthoconic antiferroelectrics chiral compounds
• phase transitions
• synthesis

Acknowledgments

This work was carried under grant the Polish State Committee for Scientific Research (KBN) N20402931/0512 and PBS 765.

Notes

Upper row – temperatures from DSC observations obtained in heating cycle; down row – enthalpies; () – temperatures from DSC observations obtained during cooling cycle.

Temperatures obtained during heating cycle.