@article{oai:nagoya.repo.nii.ac.jp:00024548,
 author = {Ishidate, Ryoma and Ikai, Tomoyuki and Kanoh, Shigeyoshi and Yashima, Eiji and Maeda, Katsuhiro},
 issue = {3-4},
 journal = {Chirality},
 month = {Apr},
 note = {Novel poly(biphenylylacetylene) derivatives bearing two acetyloxy groups at the 2- and 2′-positions and an alkoxycarbonyl group at the 4′-position of the biphenyl pendants (poly-Ac's) were synthesized by the polymerization of the corresponding biphenylylacetylenes using a rhodium catalyst. The obtained stereoregular (cis-transoidal) poly-Ac's folded into a predominantly one-handed helical conformation accompanied by a preferred-handed axially twisted conformation of the biphenyl pendants through noncovalent interactions with a chiral alcohol and both the induced main-chain helicity and the pendant axial chirality were maintained, that is, memorized, after complete removal of the chiral alcohol. The stability of the helicity memory of the poly-Ac's in a solution was lower than that of the analogous poly(biphenylylacetylene)s bearing two methoxymethoxy groups at the 2- and 2′-positions of the biphenyl pendants (poly-MOM's). In the solid state, however, the helicity memory of the poly-Ac's was much more stable and showed a better chiral recognition ability toward several racemates than that of the previously reported poly-MOM when used as a chiral stationary phase for high-performance liquid chromatography. In particular, the poly-Ac-based CSP with a helicity memory efficiently separated racemic benzoin derivatives into enantiomers.},
 pages = {120--129},
 title = {Chromatographic enantioseparation by poly(biphenylylacetylene) derivatives with memory of both axial chirality and macromolecular helicity},
 volume = {29},
 year = {2017}
}