Linear dichroism of perylene derivatives in a nematic liquid crystal

Autor:	Hartmut Schulze, Hans-Georg Kuball, Danuta Bauman
Rok vydání:	2000
Předmět:	Materials science Absorption spectroscopy Biaxial nematic business.industry General Chemistry Condensed Matter Physics Linear dichroism Molecular physics Optics Liquid crystal General Materials Science Tensor Absorption (chemistry) Anisotropy business Spectroscopy
Zdroj:	Liquid Crystals. 27:1357-1367
ISSN:	1366-5855 0267-8292
DOI:	10.1080/026782900423412
Popis:	The polarized absorption spectra of derivatives of 3,4,9-perylenetricarboxylic acid and of 3,4,9,10-perylenetetracarboxylic acid dissolved in the nematic liquid crystal mixture ZLI 1695 have been recorded as a function of temperature. On the basis of these spectra, the directions of the absorption transition moments with respect to the principle axes of the order tensor, and the order parameters S * and D * for perylene derivatives have been determined assuming a C s or C 2 point symmetry group for the dyes molecules. From a generalized equation describing properties of anisotropic phases, the conditions necessary to determine a complete set of the order parameters and the pieces of possible information that can be obtained from the polarized optical spectroscopy are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::53982ac752cd0ff3f3bee195c0cb92e2 https://doi.org/10.1080/026782900423412 Zobrazit plný text záznamu