Several novel cellulose derivatives with triphenylmethyl or 1-methylnaphthalene substituents at the primary hydroxyl positions and n-alkyl or benzyl substituents at the secondary hydroxyl positions have been prepared and characterized. The 6-O-trityl-2,3-O-alkyl cellulose and 6-O-trityl-2,3-O-benzyl cellulose derivatives form lyotropic chiral nematic liquid crystalline phases that display reflection colours. Both left and right-handed chiral nematic phases have been observed; the twist sense depends on the nature of the side-group substitution and the solvent. The chiroptical activity of the phenyl chromophores attached to these polymers depends on several factors such as the presence or absence of a chiral nematic structure and in the case of mesophases it also depends on the chiral nematic twist sense. / The polymer 6-O-$ alpha$-(1-methylnaphthalene)-2,3-O-pentyl cellulose forms a right-handed thermotropic chiral nematic mesophase. This polymer shows dilute solution chiroptical activity from the naphthyl chromophores, indicative of a helical arrangement of chromophores along the chain.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.74541 |
| Date | January 1990 |
| Creators | Harkness, Brian Robert |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Chemistry.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001170755, proquestno: AAINN66392, Theses scanned by UMI/ProQuest. |
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