Studies of Phase Diagram of a Liquid Crystal with 4-[2-(3-Fluorophenyl)ethyl]biphenyl Core of Molecules

• Authors: Ł. Kolek , M. Massalska-Arodź , D. Majda , B. Wantusiak , S. Zalewski , P. Kula
• Languages of publication: EN

Abstracts

EN

Basing on the results of differential scanning calorimetry and transmitted light intensity methods and texture observations in the temperature range from - 50C to 90C phase diagram of 1-[3-fluoro-4-(1-methylheptyloxycarbonyl)phenyl]-2-[4'-(2,2,3,3,4,4,4-heptafluorobutoxybutoxy)biphenyl-4-yl]ethane was established. Monotropic system of thermodynamic phases was found. On cooling the isotropic phase transforms at 85C to ferroelectric SmC* phase and further two liquid crystalline phases, antiferroelectric SmC*_{A} and SmI, and a metastable crystal Cr2 reveal. During heating exothermic anomaly in the wide temperature range was observed and ascribed to evolution of Cr2 to the stable crystal Cr1. On further heating both SmC*_{A} and SmC* phases were observed. Thermodynamic parameters were calculated for all phase transitions. During rapid cooling (10 K/min) vitrification of metastable Cr2 crystal at T_{g} = - 115C was registered.

Keywords

EN

64.70.M-; 62.20.Jk

Discipline

• 64.70.M-: Transitions in liquid crystals

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 2
• Pages: 370-374

Dates

published

2012-08

Contributors

author

Ł. Kolek

• Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Kraków, Poland

author

M. Massalska-Arodź

• Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Kraków, Poland

author

D. Majda

• Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30-060 Kraków, Poland

author

B. Wantusiak

• Institute of Chemistry, Siedlce University of Natural Sciences and Humanities, 3-go Maja 54, 08-110 Siedlce, Poland

author

S. Zalewski

• Institute of Chemistry, Siedlce University of Natural Sciences and Humanities, 3-go Maja 54, 08-110 Siedlce, Poland

author

P. Kula

• Institute of Chemistry, Military University of Technology, S. Kaliskiego 2, 00-908 Warszawa, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.122.370