Hierarchical Self-Assembly, Co-Assembly and Self-Organization of Novel Liquid Crystalline Lattices and Superlattices from a Twin-Tapered Dendritic Benzamide and its Four-Cylindrical Bundle Supramolecular Polymer

Reference:

V. Percec,T. K. Bera, M. Glodde, Q. Fu, V. S. K. Balagurusamy, P. A. Heiney,Chem. Eur. J. 9, 921-935 (2003).

Abstract:

The synthesis and structural analysis of the twin-dendritic benzamide, 10, based on the first generation self-assembling tapered dendrons 3,4,5-tris(4'-dodecyloxybenzyloxy)benzoic acid and 3,4,5-tris(4'-dodecyloxybenzyloxy)-1-aminobenzene, and of the polymethacrylate, 20, containing 10 as side groups is presented. 10 self-assembles into a supramolecular cylindrical dendrimer that self-organizes in a columnar hexagonal (phi_h) liquid crystalline (LC) phase. 20 self-assembles into an imperfect four-cylindrical bundle supramolecular dendrimer that creates a giant vesicular supercylinder that self-organizes into a columnar nematic N _c LC phase that displays short range hexagonal order. In mixtures of 20 with 10, 10 acts as a guest and 20 as a host to create a perfect four-cylindrical bundle host-guest supramolecular dendrimer that co-organizes with 10. A diversity of phi_h) ,simple-rectangular columnar (phi_rs) and centered-rectangular columnar (phi_rc) superlattices are produced at different ratios between 20 and 10. This diversity of LC lattices and superlattices is facilitated by the architecture of the twin-dendritic building block, of its polymethacrylate, of their host-guest supramolecular assembly, and by the hydrogen bonding along the center of the supramolecular cylinders generated from 10 and 20.

GO TO PAUL HEINEY'S PERSONAL WEB PAGE