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Effects of Anthraquinone Dye Aggregation on Selective Reflection Spectra of Cholesteric Liquid Crystal

Authors
Pergamenshchik, V. M.Vasyuta, R. M.Boiko, O. P.Nazarenko, V. G.Zavora, L. N.Lisetski, L. N.Panikarskaya, V. D.Kasian, N. A.
Issue Date
2008
Publisher
TAYLOR & FRANCIS LTD
Keywords
aggregation; anthraquinone dye; birefringence; cholesteric liquid crystal; non-mesogenic dopant; selective reflection
Citation
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.496, pp 202 - 211
Pages
10
Indexed
SCIE
SCOPUS
Journal Title
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume
496
Start Page
202
End Page
211
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/125574
DOI
10.1080/15421400802451717
ISSN
1542-1406
1543-5318
Abstract
The formation of supramolecular aggregates of anthraquinone dye N,N'-(4-methylphenyl)-1,4-diaminoanthraquinone (AQ) is shown to be clearly manifested in temperature-dependent selective reflection spectra of cholesteric solvents containing AQ as a non-mesogenic dopant. Using cholesteric matrices of different chemical nature (based on cholesterol esters or nematics with chiral dopants), one can distinguish between interactions of a solvent with individual AQ molecules and AQ aggregates, as well as between the aggregation and precipitation of AQ. The calculated relative birefringence data demonstrate the effects of AQ aggregates on the optical anisotropy and the orientational order in. the systems under study.
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