Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-7895
Main Title: The Crystal and Mesophase Structure of Hexakis(alkylsulfono)- benzene Homologues by X-Ray Diffractometry
Author(s): Spielberg, N.
Luz, Z.
Poupko, R.
Praefcke, K.
Kohne, B.
Pickardt, Joachim
Horn, K.
Type: Article
Language Code: en
Abstract: A powder X-ray diffractometer study of hexakis(tridecylsulfono)benzene (HASB13) has been carried out over the temperature range 20 to above 80 °C. In this range three phase transitions are observed by sharp discontinuities in the diffraction pattern indicating a solid-solid, solidmesophase, and mesophase-liquid transition. The mesomorphic phase is identified as a hexagonal columnar discotic mesophase, Dhd, with intercolumnar spacing of 25.7 Å and average stacking distance of 4.9 Å. Both distances are independent of temperature but there appears to be a gradual increase in the stacking disorder as the temperature is increased. The magnitude of the intercolumnar distance suggests a considerable degree of side chain disorder. A detailed X-ray diffraction study was also performed at room temperature on a single crystal of hexakis(propylsulfono) benzene (HASB3), which is not mesogenic. The results provide detailed information on the structure of HASB 3 which is used in the interpretation of HASB 13 results.
URI: https://depositonce.tu-berlin.de//handle/11303/8766
http://dx.doi.org/10.14279/depositonce-7895
Issue Date: 1986
Date Available: 2-Jan-2019
DDC Class: 500 Naturwissenschaften und Mathematik
Subject(s): X-ray diffractometer
hexakis(tridecylsulfono)benzene (HASB13)
mesophase
License: https://creativecommons.org/licenses/by-nc-nd/3.0/
Journal Title: Zeitschrift für Naturforschung A
Publisher: De Gruyter
Publisher Place: Berlin
Volume: 41
Issue: 6
Publisher DOI: 10.1515/zna-1986-0612
Page Start: 855
Page End: 860
EISSN: 1865-7109
ISSN: 0932-0784
Appears in Collections:FG Organische Chemie / Synthese und Katalyse » Publications

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