Jul 6 – 10, 2015
Institute of Nuclear Physics PAN, Kraków
Europe/Warsaw timezone

New class of chiral azobenzene mesogens: 4-[(E)-(4-alkylphenyl)diazenyl]phenyl cholesteryl adipates

Jul 9, 2015, 6:35 PM
15m
Institute of Nuclear Physics PAN, Kraków

Institute of Nuclear Physics PAN, Kraków

Crown Piast Hotel

Speaker

Prof. Zbigniew Galewski (Faculty of Chemistry, University of Wroclaw, Poland)

Description

Liquid-crystalline azobenzene derivatives are today very important materials in modern opto-electronics [1,2]. Chiral moiety can induce extra new structures and physical properties. In this communication after short review about mesogenic chiral azobenzenes a new series of compounds are presented [3]. Four types of mesophases were identified: chiral nematic, smectic A*, smectic C* and TGBA. For decyl derivative freezing process is not observed. Glass state is created. By the use of the UV-Vis spectroscopy the photoisomerization studies were conducted. Moreover, the circular dichroism (CD) spectra were measured. References [1] Q. Li, Liquid Crystals Beyond Displays. Chemistry, Physics and Applications, Wiley, 2012. [2] A. Sobolewska, J. Zawada, S. Bartkiewicz, and Z. Galewski, J. Phys. Chem. C 117, 10051−10058 (2013). [3] J. Czeszejko-Sochacka, PhD Thesis, University of Wrocław, 2010.

Primary author

Prof. Zbigniew Galewski (Faculty of Chemistry, University of Wroclaw, Poland)

Co-authors

Ms Izabela Niezgoda (Faculty of Chemistry, University of Wroclaw, Poland) Dr Justyna Czeszejko-Sochacka (Faculty of Chemistry, University of Wroclaw, Poland)

Presentation materials