Double screw-sense inversions of helical chiral-achiral random copolymers of fluorene derivatives in phase separating solutions

作者：Sanada Yusuke; Terao Ken; Sato Takahiro^*

来源：Polymer Journal, 2011, 43(10): 832-837.

DOI：10.1038/pj.2011.75

• chiral-achiral random copolymer
• circular dichroism induction
• helical screw-sense inversion
• phase separation
• polyfluorene

The addition of methanol to dilute THF solutions of chiral-achiral random copolymers of fluorene derivatives and the chiral homopolymer showed thermo-reversible circular dichroism (CD) induction in the main-chain fluorene absorption region. This finding demonstrated the uneven population of the right- and left-handed helical conformations in the polymer chains. From the sign of the induced CD, two helical screw-sense inversions were found by changing the chiral monomer content. The Ising model for chirally interacting chiral-achiral random copolymers can explain the double screw-sense inversions. Polymer Journal (2011) 43, 832-837; doi: 10.1038/pj.2011.75; published online 3 August 2011

• 出版日期2011-10