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Proceedings Paper

Determination of phase transitions in liquid crystals by optical absorption spectroscopy
Author(s): Cristian Sarpe-Tudoran; Margareta Socaciu; Marcela Ursache; Johny Neamtu; G. Bratulescu; S. Radu
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Paper Abstract

Some interesting experimental results involving new synthesized liquid crystals, derivatives of 4,4'-dihidroxyazobenzene and 4,4'-dihidroxy-azoxybenzene inferred by means of optical absorption spectroscopy are exposed. The absorption spectra dependence on the sample temperature in both heating and cooling processes is investigated. At the same time, the optical density is recorded at a fixed wavelength and it presents significant variations at phase transition temperatures. These data complete the results correlated with mesomorphism, obtained by classical techniques (DTA and microstructural analysis in polarized light).

Paper Details

Date Published: 2 July 1998
PDF: 4 pages
Proc. SPIE 3405, ROMOPTO '97: Fifth Conference on Optics, (2 July 1998); doi: 10.1117/12.312817
Show Author Affiliations
Cristian Sarpe-Tudoran, Univ. of Craiova (Romania)
Margareta Socaciu, Univ. of Craiova (Romania)
Marcela Ursache, Univ. of Craiova (Romania)
Johny Neamtu, Univ. of Craiova (Romania)
G. Bratulescu, Univ. of Craiova (Romania)
S. Radu, Univ. of Craiova (Romania)

Published in SPIE Proceedings Vol. 3405:
ROMOPTO '97: Fifth Conference on Optics
Valentin I. Vlad; Dan C. Dumitras, Editor(s)

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