| 초록 |
In this work, we present current progress toward the synthesis of helical conjugated polymers using a chiral nematic liquid crystal reaction field as an asymmetric polymerization solvent. Here we focus on hierarchically-controlled helical polyacetylene, which was recently put forward. The hierarchical helical structures (i.e., screw direction of the polyacetylene chain, fibril bundle, and spiral morphology) are rigorously controlled by changing the screw degree or direction of the chiral nematic liquid crystal reaction field. In addition, we show a novel preparation of helical carbon and graphite films from iodine-doped helical polyacetylene through a carbonization process. Carbonization of helical polyacetylene films, via iodine doping, was found to yield carbon and graphitic films that completely preserved morphologies and even helical nanofibril structures. Reference: M. Goh, S. Matsushita, K. Akagi, Chem. Soc. Rev., 2010, 39, 2466-2476. |
