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Advanced conjugated polymer— helical polyacetylene
Author(s) -
Piao Guangzhe,
Kawamura Naoya,
Akagi Kazuo,
Shirakawa Hideki,
Kyotani Mutsumasa
Publication year - 2000
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/1099-1581(200008/12)11:8/12<826::aid-pat59>3.0.co;2-t
Subject(s) - polyacetylene , liquid crystal , materials science , dopant , circular dichroism , polyene , polymer , polymerization , mesogen , conjugated system , polymer chemistry , crystallography , doping , organic chemistry , liquid crystalline , composite material , chemistry , optoelectronics
Helical polyacetylene [(CH) x ] thin films were synthesized in chiral nematic (N*) liquid crystal (LC) solvents. The N*LC was prepared by adding a chiral titanium complex as a chiral dopant to a mixture of two nematic LCs. The titanium complexes induced the N* phase when dissolved in nematic LCs and they were catalytically active for acetylene polymerization. Positive or negative Cotton effect was observed in the region of π → π* transition of polyene chain in circular dichroism (CD) spectra for the (CH) x thin films synthesized under the N* LC. Spiral fibrillar morphology was observed through SEM measurement of the helical (CH) x film. Copyright © 2000 John Wiley & Sons, Ltd.