Main > SUPRAMOLECULAR CHEMISTRY > Fluorous Dendrimer Structure > Org.: USA. U. (Research/Patent) > NonPatent Literature Description
Author et al have shown that fluorination can be exploited to generate and amplify nonbonding intramolecular and intermolecular interactions in self-assembly processes.
Author s recent work on this topic has focused on the self-assembly of semifluorinated dendritic supramolecular structures. The procedure involves replacing some of the hydrogen atoms of a dendron--a dendritic wedge--with fluorine atoms.
"Semifluorination changes the shape of a conical dendron into a crownlike dendron". "As a result, the dendrimers self-organize into a pyramidal column rather than the usual spherical architecture."
Last month, group reported the self-assembly of semifluorinated Janus-dendritic benzamides into bilayered pyramidal columns. The Janus--or two-faced--dendrimers consist of two different dendrons connected at their apexes.
"When two identical dendrons of a twin-dendritic benzamide are either hydrogenated or fluorinated, they self-assemble into supramolecular columns". "When one of the dendrons is fluorinated and the other hydrogenated, we obtain a Janus-dendritic benzamide that self-assembles into the bilayered pyramidal architecture. The columns that are formed have twice the diameter of those of either the hydrogenated or fluorinated twin-dendritic benzamides.
"Apart from providing an unusual example of the fluorophobic effect in self-assembly, these new supramolecular pyramidal dendrimers open up numerous new strategies for the construction of complex molecular nanosystems," he added.
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