Self-Assembly of Semifluorinated Janus-Dendritic Benzamides into Bilayered Pyramidal Columns

✍ Scribed by Virgil Percec; Mohammad R. Imam; Tushar K. Bera; Venkatachalapathy S. K. Balagurusamy; Mihai Peterca; Paul A. Heiney

• Book ID: 102722137
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 611 KB
• Volume: 117
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/ange.200501254

✦ Synopsis

Amphiphilic dendrons that adopt the shape of a disk or disk fragment can self-assemble into supramolecular columns which self-organize into p6mm hexagonal or p2mm and c2mm rectangular 2D periodic assemblies. [1, 2] The apex of such dendrons generates the hollow [1l] or occupied [1a-k] functional core of the supramolecular column (Figure 1 a). Twintapered dendritic benzamides self-assemble into supramolecular columns generated by an orthogonal hydrogen-bonded stack of dendritic benzamide units (Figure 1 b). [3] These supramolecular columns self-organize into periodically ordered p6mm hexagonal assemblies or co-assemble into more complex hexagonal superlattices. [3] Amphiphilic dendrons that adopt the shape of a sphere fragment can selfassemble into spherical supramolecular dendrimers, which self-organize into periodic Pm3 ¯n, [1d,h, 4a-4c] Im3 ¯m[4d-f] 3D cubic and P4 2 /mnm 3D tetragonal, [4g] and quasiperiodic 3D 12-fold symmetry-forbidden liquid quasicrystals. [4h] It was recently reported that semifluorination of the conical dendron (3,4,5) 2 12G2-CO 2 CH 3 yields the crownlike dendron (3,4,5) 2 12F8G2-CO 2 CH 3 as one of the two products. [5]