Coordination-Driven Self-Assembly of Charged and Neutral Dendritic Tetrakis(ferrocenyl) Rhomboids

By combining 60 degrees bis(ferrocenyl) di-Pt(II) acceptors and the complementary 120 degrees dipyridyl or dicarboxylate donors substituted with [G-1]-[G-3] Frechet-type dendrons, self-assembly of a new series of charged or neutral dendritic tetrakis(ferrocenyl) rhomboids was realized under mild conditions in high yields, respectively. The structures of all difunctionalized rhomboids were characterized by multinuclear NMR (H-1 and P-31), ESI-TOF-MS, CSI-TOF-MS, and elemental analysis. Moreover, their electrochemical behavior was studied through cyclic voltammetry investigations. Further insight into the structural characterization of all rhomboidal metallacycles, such as the shape and size, was obtained via molecular simulation by PM6 semiempirical molecular orbital methods.