Synthesis, characterization, and self-assembly behavior of poly(m-phenylene)s with terthiophene and chiral side chains
Kazuhiro Nakabayashi, Karin Fujita
A series of novel poly(m-phenylene)s with terthiophene and/or chiral side chains have been developed to investigate the correlation between poly(m-phenylene) polymer structure and self-assembly behaviors. As a result of circular dichroism spectroscopy, a poly(m-phenylene) that alternately had terthiophene and chiral side chains exhibited the clear Cotton effect in THF, THF/methanol, and THF/acetonitrile conditions, indicating that the defined nanostructure was successfully formed by efficiently using the two interactions between side chains even in the good solvent condition. On the other hand, poly(m-phenylene)s with an irregularly sequence of terthiophene and chiral side chains did not have a capability to form the nanostructure regardless of solvent condition. These results demonstrated that an efficient usage of side chain interactions based on an alternating polymer structure was important for the formation of self-assembled nanostructure in poly(m-phenylene)s.
Circular dichroism, Cotton effect, Polymers, Chemical stability, Nanostructures, Materials