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From Y- to Siamese-twin shaped glycolipids |
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| Authors: | G E Milkereit S S H Gerber Karin Jankowski A Terjung R R Schmidt V Vill |
| Institution: | (1) Institute of Organic Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany;(2) Institute of Organic Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany;(3) University of Konstanz, Dept. of Chemistry, Fach M 725, 78457 Konstanz, Germany;(4) University of Konstanz, Dept. of Chemistry,, Fach M 725, 78457 Konstanz, Germany;(5) University of Konstanz, Dept. of Chemistry, Fach M 725, 78457 Konstanz, Germany;(6) Institute of Organic Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany |
| Abstract: | Summary A set of Y-shaped and Siamese-twin shaped carbohydrate based glycolipids was investigated using polarising microscopy. The structure was changed from the normal type (1 head, two chains) to complex inverted structures (2 heads outside 1 to 3 chains in the middle part). The carbohydrate headgroup was changed from mono- to disaccharide; also the alkyl chain length was varied systematically. The compounds displayed different thermotropic mesophases (Smectic A phases, columnar phases and cubic phases) depending on the type of carbohydrate headgroup and the alkyl chain length. |
| Keywords: | glycolipids glyco glycero lipids thermotropic liquid crystals |
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