Transfer of chirality from molecule to phase in self-assembled chiral block copolymers. Academic Article uri icon


  • Here, we report the mechanisms of chiral transfer at various length scales in the self-assembly of enantiomeric chiral block copolymers (BCPs*). We show the evolution of homochirality from molecular chirality into phase chirality in the self-assembly of the BCPs*. The chirality of the molecule in the BCP* is identified from circular dichroism (CD) spectra, while the handedness of the helical conformation in the BCP* is determined from a split-type Cotton effect in vibrational circular dichroism spectra. Microphase separation of the BCP* is exploited to form a helical (H*) phase, and the handedness of helical nanostructure in the BCP* is directly visualized from transmission electron microscopy tomography. As examined by CD and fluorescence experiments, significant induced CD signals and a bathochromic shift of fluorescence emission for the achiral perylene moiety as a chemical junction of the BCPs* can be found while the concentration of the BCPs* in toluene solution is higher than the critical micelle concentration, suggesting a twisting and shifting mechanism initiating from the microphase-separated interface of the BCPs* leading to formation of the H* phase from self-assembly.

published proceedings

  • J Am Chem Soc

altmetric score

  • 1

author list (cited authors)

  • Ho, R., Li, M., Lin, S., Wang, H., Lee, Y., Hasegawa, H., & Thomas, E. L.

citation count

  • 103

complete list of authors

  • Ho, Rong-Ming||Li, Ming-Chia||Lin, Shih-Chieh||Wang, Hsiao-Fang||Lee, Yu-Der||Hasegawa, Hirokazu||Thomas, Edwin L

publication date

  • January 2012