Phase Transformation of Swollen Thermotropic Liquid Crystals Studied by X-Ray and2H-NMR Measurements

Autor:	Kazuyuki Hiraoka, Yoshihiro Omata, Hideaki Hattori, Nobuyuki Ban, Masato Oshima, Yoshinori Sasaki, Atsushi Kato, Kenji Koguma
Rok vydání:	2009
Předmět:	Materials science General Chemistry Condensed Matter Physics Thermotropic crystal Crystal Crystallography chemistry.chemical_compound chemistry Liquid crystal Phase (matter) X-ray crystallography Lyotropic General Materials Science Texture (crystalline) Octane
Zdroj:	Molecular Crystals and Liquid Crystals. 509:1/[743]-8/[750]
ISSN:	1563-5287 1542-1406
DOI:	10.1080/15421400903050970
Popis:	Molecular realignments during the successive phase transformations of a binary mixture of smectogenic and aliphatic compounds have been studied. The layer spacing, which is about 38.5 A in the crystal phase, abruptly increases up to 54 A during the transformation to the smectic phase, because aliphatic molecules are taken into the smectic liquid crystals during the transformation. A myelinic texture is observed in the smectic phase in which the liquid crystals are swollen with the aliphatic molecules. In addition, the quadrupolar splitting is observed in the 2H-NMR spectra of the sample swollen with d8 -octane, because the aliphatic molecules are averagely oriented parallel to the director of the smectogens in the swollen smectic liquid crystals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::502008b8d2bf6a96d34384f4246179e1 https://doi.org/10.1080/15421400903050970 Zobrazit plný text záznamu