Coassembly of a Hexagonal Columnar Liquid Crystalline Superlattice from Polymer(s) Coated with a Three-Cylindrical Bundle Supramolecular Dendrimer
摘要:
The synthesis and structural analysis of a polymer containing twin-dendritic benzamide side-groups (i.e. poly(N-[3,4-bis(n-dodecan-1-yloxy)-5-(1-methacryloyl-n-undecan-1-yloxy)phenyl] -3,4,5-tris (n-dodecan-1-yloxy)benzamide)) (19) are described. The disc-like side groups of this polymer self-assemble into supramolecular cylindrical dendrimers through hydrogen bonding acting along the column long axis, creating a novel architecture consisting of a polymer chain(s) coated with a three-cylindrical bundle supramolecular dendrimer. This polymer self-organizes in a thermotropic nematic liquid crystalline (LC) phase. The low molar mass twin dendritic benzamide, 7-12/12, which has a similar structure to that of the polymer side groups, self-assembles into supramolecular cylindrical dendrimers, which self-organize on a two-dimensional hexagonal columnar (Phi(h)) LC lattice. Coassembly of the polymer 19 with 7-12/12 produces a novel two-dimensional Phi(h) LC superlattice. The mechanism responsible for this coassembly provides access to libraries of functional two-dimensionl Phi(h) superlattices.