Novel Approach to Stabilize Unstable Molecular Wires by Simultaneous Rotaxane Formation – Synthesis of Inclusion Complexes of Oligocarbynes with Cyclic Host Molecules
An effective method to stabilize oligocarbynes as a modelfor polycarbyne by the simultaneous complexation withα-cyclodextrin (α-CD) is described. 1,12-Bis(9-phenanthryl)-1,3,5,7,9,11-dodecahexayne possessing one or two α-CD molecules was prepared by the oxidative coupling reaction of the corresponding triyne in the presence of α-CD. The resulting rotaxanes proved to be stable enough in comparison with the corresponding free oligoynes. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)