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

被引：0
|
作者：
Yusuke Sanada
Ken Terao
Takahiro Sato
机构：
[1] Osaka University,Department of Macromolecular Science
[2] 2Current address: Department of Chemical Processes and Environments,undefined
[3] Faculty of Environmental Engineering,undefined
[4] The University of Kitakyushu,undefined
[5] 1-1 Hibikino Wakamatsu-ku,undefined
[6] Kitakyushu,undefined
[7] Fukuoka 808-0135,undefined
[8] Japan,undefined
来源：
Polymer Journal | 2011年 / 43卷
关键词：
chiral-achiral random copolymer; circular dichroism induction; helical screw-sense inversion; phase separation; polyfluorene;
D O I：
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学科分类号：
摘要：
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.
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页码：832 / 837
页数：5
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