Polymorphism of Chiral Thioester Studied by Dielectric Spectroscopy

• Authors: A. Wawrzyniak , J. Chruściel , R. Douali , F. Dubois , J. Leblond , Ch. Legrand , D. Ossowska-Chruściel , M. Marzec , P. Ropa , J. Czerwiec , S. Wróbel
• Languages of publication: EN

Abstracts

EN

(S)-(+)-4'-[(4-(1-methylheptyloxycarbonylphenyl) thiocarbonylphenyl]-decyloxybenzoate (in short 10.OPOSMH) was studied by complementary methods. The substance shows rich polymorphism. In addition to ferroelectric and antiferroelectric smectic C* phases it possesses three ferrielectric sub-phases. Phase transitions between the phases were revealed by differential scanning calorimetry and static dielectric permittivity measurements. The aim of this paper was to study phase transitions and differences in dielectric spectra shown by different phases. Collective and molecular dynamics of all phases shown by 10.OPOSMH will be discussed in terms of theoretical models. Dielectric spectra of antiferroelectric phase show two characteristic dielectric relaxation modes: one connected with the molecular process (reorientation around the short axis) and the other originating from fluctuations of antiferroelectric order parameters.

Keywords

EN

77.84.Nh; 64.70.M-; 77.22.Gm; 77.22.Ej

Discipline

• 77.22.Gm: Dielectric loss and relaxation
• 77.22.Ej: Polarization and depolarization
• 77.84.Nh: Liquids, emulsions, and suspensions; liquid crystals(for structure of liquid crystals, see 61.30.-v)
• 64.70.M-: Transitions in liquid crystals

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 6
• Pages: 933-936

Dates

published

2013-12

Contributors

author

A. Wawrzyniak

• Jagiellonian University, Institute of Physics, W.S. Reymonta 4, 30-059 Kraków, Poland

author

J. Chruściel

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

author

R. Douali

• Université du Littoral, Côte d'Opale, 50 rue F. Buisson, B.P. 717, 62228 Calais, France

author

F. Dubois

• Université du Littoral, Côte d'Opale, 50 rue F. Buisson, B.P. 717, 62228 Calais, France

author

J. Leblond

• Université du Littoral, Côte d'Opale, 50 rue F. Buisson, B.P. 717, 62228 Calais, France

author

Ch. Legrand

• Université du Littoral, Côte d'Opale, 50 rue F. Buisson, B.P. 717, 62228 Calais, France

author

D. Ossowska-Chruściel

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

author

M. Marzec

• Jagiellonian University, Institute of Physics, W.S. Reymonta 4, 30-059 Kraków, Poland

author

P. Ropa

• Université du Littoral, Côte d'Opale, 50 rue F. Buisson, B.P. 717, 62228 Calais, France

author

J. Czerwiec

• Jagiellonian University, Institute of Physics, W.S. Reymonta 4, 30-059 Kraków, Poland

author

S. Wróbel

• Jagiellonian University, Institute of Physics, W.S. Reymonta 4, 30-059 Kraków, Poland

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Identifiers

DOI

10.12693/APhysPolA.124.933