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Alternating copolymer of bithiophene and dialkylbithiazole and its tendency to align on the surfaces |
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| Authors: | Takakazu Yamamoto Syun-ichi Otsuka Hiroki Fukumoto Takashi Fukuda Takeshi Yamanobe Zhengguo Cai |
| Affiliation: | a Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan b National Institute of Advanced Industrial Science and Technology (AIST), Central 5, Higashi 1-1-1, Tsukuba, Ibaraki 305-8565, Japan c Department of Biomolecular Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan d Department of Chemistry, Gunma University, Kiryu, Gunma 376-8515, Japan e Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan |
| Abstract: | New five-membered ring π-conjugated polymers composed of 2,2′-bithiophene and 4,4′-dialkyl-2,2′-bithiazole units were prepared. The polymers were soluble in 1,2-dichlorobenzene and showed a UV-vis peak at about 490 nm above 120 °C. Cooling the solution led to the appearance of new UV-vis peaks at 550 and 600 nm, which were considered to originate from self-assembled polymer molecules. Powder XRD (X-ray diffraction) data supported a well-stacked solid structure of the polymers and a highly ordered structure of a polymer film formed on a quartz glass substrate. These data revealed a strong tendency of the new polymers to self-assemble and to form an aligned structure on the surface of the substrates. |
| Keywords: | Conjugated polymer Molecular assembly Polyaromatics |
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