Self-Organization of Dendritic Supermolecules, Based on Isocyanide-Gold(I), -Copper(I), -Palladium(II), and -Platinum(II) Complexes, into Micellar Cubic Mesophases

• Published in: Chemistry : a European journal 2008-04, Vol.14 (12), p.3544-3552
• Main Authors: Coco, Silverio, Cordovilla, Carlos, Donnio, Bertrand, Espinet, Pablo, García-Casas, María Jesús, Guillon, Daniel
• Format: Article
• Language: English
• Subjects: Copper - chemistry; Cyanides - chemistry; dendrimers; Dendrimers - chemistry; Gold - chemistry; isocyanides; liquid crystals; Macromolecular Substances - chemistry; metallomesogens; Micelles; Molecular Structure; Organometallic Compounds - chemical synthesis; Organometallic Compounds - chemistry; Palladium - chemistry; Phase Transition; Platinum - chemistry; self-assembly
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.200800128

First‐ and second‐generation dendrimers with an isocyanide group as the focal functional point (CN‐Gn; n: 1,2) and their corresponding organometallic complexes [MCl(CN‐Gn)] (M: Au, Cu), [{CuCl(CN‐Gn)2}2], and trans‐[MI2(CN‐Gn)2] (M: Pd, Pt) have been synthesized. The free ligands and the first‐generation complexes do not show mesogenic behavior, but all of the second‐generation complexes display a thermotropic micellar cubic mesophase, over a large temperature range, and some of them directly at room temperature. The structure of the mesophase consists of the packing of two, discrete polyhedral micellar aggregates in a three‐dimensional cubic Im$\bar 3$m lattice. Branching out! Stable metallodendrimers made from monodendrons with an isocyanide group in the focal point have been prepared. Although the molecules of the metallodendrimers prepared are structurally very different, consisting of one, two, or four monodendrons, the structures of the mesophases are similar and consist of the packing of micellar aggregates in a three‐dimensional cubic Im$\bar 3$m lattice (see scheme).