The allotropes of carbon have gained large attention from scientists. Yet the one dimensional sp hybridized species 'carbyne', (C=C)8, provides space for more exploration. The stability of polyyne chains decreases as they become more accessible to reagents with the increasing length. An increase in stability has been achieved by capping the polyyne chains with inorganic endgroups such as [trans-(C6F5)((p-tol)3P)2Pt]+ and by steric insulation . Thus, we explore [2]rotaxane assemblies containing platinum-capped polyyne chains , where the macrocyclic rotor serves as a dynamic steric protector to the polyynediyl fragment. The synthesis of these interlocked supramolecular architectures implements an active metal template approach that features a copper(I) complex. Modifications of the macrocycle and alkyne coupling conditions were explored. Characterization by multinuclear NMR spectroscopy, cyclic voltammetry, single crystal diffraction, etc. was employed. Progress in the study of sterically insulated polyyne chains via the formation of [2]rotaxanes will be presented.

[2]Rotaxanes containing platinum-capped polyyne chains

244th National Meeting (2012)

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