Abstract
The transport of ions across molecular cages that mimic the behavior of bio-membranes has been of wide interest to researchers, but the synthesis of cage or capsular entities with ion transport properties is often challenging. A variety of molecular building blocks, such as calixarenes or cavitands, has been employed to study encapsulation and ion-transport properties. Recently, we have studied the transport of ions into the interior of gallium-containing pyrogallol[4]arene nanoassemblies, and the results of those studies are the focus of this article. Specifically, the transport of silver(I), cesium(I) and thallium(I) ions into the interior of C-butylpyrogallol[4]arene nanocapsules has been investigated. The transformation of solid-state spherical gallium hexamers to solution-phase toroidal frameworks suggests a structural rearrangement and concomitant inclusion or exclusion of ions in solution. Cation…π interactions and the anion position in the assembly play important roles in the stability of the inclusion complexes.
Keywords: Supramolecular chemistry, Ion-molecule interactions, Solution, Spheres, Toroids, NMR, SANS.
Call for Papers in Thematic Issues
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
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