Photophysical properties of discotic hexa(heptylthio)tricycloquinazoline in crystalline and liquid crystalline phases

Pawel Uznanski; Marian Kryszewski

doi:10.1117/12.300011

1 February 1998 Photophysical properties of discotic hexa(heptylthio)tricycloquinazoline in crystalline and liquid crystalline phases

Pawel Uznanski, Marian Kryszewski

Author Affiliations +

Proceedings Volume 3318, Liquid Crystals: Physics, Technology, and Applications; (1998) https://doi.org/10.1117/12.300011
Event: Liquid Crystals, 1997, Zakopane, Poland

Abstract

The photophysical studies of the discogenic title compound in thin films are reported and correlated with its thermal properties. Either the columnar or the crystalline phase is stable at room temperature. The absorption and fluorescence spectra of the columnar mesophase are different depending on the thermal history of the sample and are clearly distinguishable from those of corresponding to crystalline phase allowing the study of phase transitions. Changes observed in absorption and emission spectra during columnar mesophase formation show a rich diversity, what was related to molecular rearrangements from homeotropic to homogenic- like orientation in spectroscopic cell.

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Pawel Uznanski and Marian Kryszewski "Photophysical properties of discotic hexa(heptylthio)tricycloquinazoline in crystalline and liquid crystalline phases", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); https://doi.org/10.1117/12.300011

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