| 초록 |
We have synthesized a coil-rod-coil molecules based on a reactive rod block that self-organizes into a 3-D hexagonal close-packed (hcp) bundle or bicontinuous cubic structure in the melt state. Photo-cross-linking within an aromatic bundle yielded macromolecular disklike objects (molecular weight of 330 kDa) with a narrow size distribution that was essentially the same as that of the supramolecular bundles. In addition, cross-linking proceeded with the retention of the 3-D hcp symmetry of the supramolecular bundles or the 3-D ordered bcc symmetry of nano-network polymer. The 3-D symmetry of the macromolecular objects was observed to recover after their isolation from the solutions and transform into an isotropic liquid in the bulk state in a reversible way, suggesting that the macromolecular objects are shape-persistent in solutions as well as an isotropic liquid phase of the bulk. Monomer and macromolecular objects structures were characterized by POM, SAXS and TEM. Finally we will report an unusual example of supramolecular structural inversion in coil-rod-coil molecules, from organized coil perforations in a rod layers to organized discrete rod-bundles in a coil matrix, while maintaining a 3-D hexagonal superlattice.
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