Conformation Control of a Conjugated Polymer through Complexation with Bile Acids Generates Its Novel Spectral and Morphological Properties.
Control of higher-order polymer structures attracts a great deal of interest for many researchers when they lead to the development of materials having various advanced functions. Among them, conjugated polymers that are useful as starting materials in the design of molecular wires are particularly attractive. However, an equilibrium existing between isolated chains and bundled aggregates is inevitable and has made their physical properties very complicated. As an attempt to simplify this situation, we previously reported that a polymer chain of a water-soluble polythiophene could be isolated through complexation with a helix-forming polysaccharide. More recently, a covalently self-threading polythiophene was reported, the main chain of which was physically protected from self-folding and chain-chain π-stacking. In this report, we wish to report a new strategy to isolate a water-soluble polythiophene and to control its higher-order structure by a supramolecular approach: that is, among a few bile acids, lithocholate can form stoichiometric complexes with cationic polythiophene to isolate the polymer chain, and the higher-order structure is changeable by the molar ratio. The optical and morphological studies have been thoroughly performed, and the resultant complex has been applied to the selective recognition of two AMP structural isomers.
Nanotechnology Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), Kyudaishinmachi 4-1, Nishi-ku, Fukuoka 819-0388, Japan.
Youichi
Y
Tsuchiya
Takao
T
Noguchi
Nanotechnology Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), Kyudaishinmachi 4-1, Nishi-ku, Fukuoka 819-0388, Japan.
Daisuke
D
Yoshihara
Bappaditya
B
Roy
Nanotechnology Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), Kyudaishinmachi 4-1, Nishi-ku, Fukuoka 819-0388, Japan.
Tatsuhiro
T
Yamamoto
Nanotechnology Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), Kyudaishinmachi 4-1, Nishi-ku, Fukuoka 819-0388, Japan.|Department of Nanoscience, Faculty of Engineering, Sojo University , Ikeda 4-22-1, Nishi-ku, Kumamoto 860-0082, Japan.
Seiji
S
Shinkai
D000249:Adenosine Monophosphate / Q000737:chemistry; D001647:Bile Acids and Salts / Q000737:chemistry*; D004121:Dimethyl Sulfoxide; D008095:Lithocholic Acid / Q000737:chemistry; D018625:Microscopy, Atomic Force; D008968:Molecular Conformation; D015394:Molecular Structure; D053770:Nanowires / Q000737:chemistry / Q000648:ultrastructure; D011108:Polymers / Q000737:chemistry*; D012997:Solvents; D013053:Spectrophotometry; D013876:Thiophenes / Q000737:chemistry; D014867:Water
D001647:Bile Acids and Salts; D011108:Polymers; D012997:Solvents; D013876:Thiophenes; D014867:Water; C066730:polythiophene; D000249:Adenosine Monophosphate; D008095:Lithocholic Acid; D004121:Dimethyl Sulfoxide