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Fluorescence study of the microstructure of a lyotropic liquid‐crystalline polyester substituted with sulfonato and nitro groups
Author(s) -
Takahashi Hiromitsu,
Horie Kazuyuki,
Yamashita Takashi,
Machida Shinjiro,
Hannah David T. B.,
Sherrington David C.
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021970909
Subject(s) - moiety , lyotropic , chemistry , fluorescence , sulfonate , nitro , polyester , lyotropic liquid crystal , liquid crystal , polymer chemistry , polymer , dimer , potassium , phase (matter) , organic chemistry , liquid crystalline , materials science , sodium , physics , alkyl , optoelectronics , quantum mechanics
The fluorescence behaviour of a lyotropic liquid‐crystalline polyester substituted with sulfonato and nitro groups, poly[potassium oxy( x ‐sulfonato‐1,4‐phenylene)oxy( x ‐nitroterephthaloyl)] ( 1 ), was studied in various phases by changing the polymer concentration. This liquid‐crystalline polymer is soluble in several organic solvents and water. The observed fluorescence is originated from complexes between the potassium sulfonate‐substituted aromatic moiety and the nitro‐substituted aromatic moiety, and also from the dimer of the potassium sulfonate‐substituted moiety. From the results of fluorescence intensity changes with concentration, the change of phase in this lyotropic liquid‐crystalline system is suggested to occur gradually. By comparing the fluorescence behaviour in various phases with those of model compounds, the microstructure of the liquid‐crystalline state can be evaluated to some extent.