Dynamics and Phase Transitions of 4-Bromobenzylidene-4'-pentyloxyaniline and 4-Bromobenzylidene-4'-hexyloxyaniline as Studied by Dielectric Spectroscopy

• Authors: N. Osiecka , M. Massalska-Arodź , Z. Galewski , K. Chłędowska , S. Wróbel , T. Morito , Y. Yamamura , K. Saito
• Languages of publication: EN

Abstracts

EN

Significant differences in phase sequence and dynamics between 4-bromobenzylidene-4'-pentyloxyaniline (5BBA) and -bromobenzylidene-4'-heksyloxyaniline (6BBA) substances were detected by broadband dielectric spectroscopy. In the smectic A (6BBA), the smectic B (found in both substances) and the smectic E (5BBA) phases the relaxation was ascribed to reorientations of the molecules around the short axes. Slow dynamics detected in the smectic E and in two crystalline phases of 5BBA was ascribed to conformational changes of molecular chains. Coexistence of Cr(I) and Cr(II) conformationally disordered crystal (CONDIS) phases was observed and vitrification of Cr(II) was identified with help of polarizing microscopy.

Keywords

EN

77.84.Nh; 64.70.pp; 64.70.M-; 33.15.Bh

Discipline

• 33.15.Bh: General molecular conformation and symmetry; stereochemistry
• 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
• 64.70.pp: Liquid crystals(see also 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: 913-916

Dates

published

2013-12

Contributors

author

N. Osiecka

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

author

M. Massalska-Arodź

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

author

Z. Galewski

• The Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland

author

K. Chłędowska

• The Faculty of Mathematics and Applied Physics, Rzeszów University of Technology, al. Powstańców Warszawy 6, 35-959 Rzeszów, Poland

author

S. Wróbel

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

author

T. Morito

• Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan

author

Y. Yamamura

• Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan

author

K. Saito

• Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan

References

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Identifiers

DOI

10.12693/APhysPolA.124.913