Chirally Homogeneous and Heterogeneous Dendritic Liquid Crystals

We have coupled methyl α-d-glucoside (G) and methyl α-d-mannoside (M) as the chiral structural variant moieties in the core and at the branching sites within dendritic scaffolds surrounded by 12 cyanobiphenyl mesogens (CB). Systematic studies of the influence of the chiral moieties on thermal and me...

Full description

Saved in:
Bibliographic Details
Published in:Macromolecules 2013-02, Vol.46 (4), p.1268-1273
Main Authors: Belaissaoui, A, Saez, I. M, Cowling, S. J, Goodby, J. W
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymers with particular structures
Preparation, kinetics, thermodynamics, mechanism and catalysts
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have coupled methyl α-d-glucoside (G) and methyl α-d-mannoside (M) as the chiral structural variant moieties in the core and at the branching sites within dendritic scaffolds surrounded by 12 cyanobiphenyl mesogens (CB). Systematic studies of the influence of the chiral moieties on thermal and mesomorphic properties were carried out by positional permutation approach of the pyranose units G and M within the core and branching points. The mesomorphic properties of the chirally homogeneous dendrimers GG4/MM4 and the corresponding chirally heterogeneous dendritic homologues GM4/MG4 were investigated by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). Remarkably, the thermal profile and the mesophase structure of the four dendrimers appear to be significantly independent of the nature of the central chiral core. The outer chirality at the periphery significantly dominates the liquid crystalline properties.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma3026332