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• Innami, Y
• Kawashima, H
• Kiebooms, R
• Aizawa, H
• Matsuishi, K
• Goto, H
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• Innami, Y
• Kawashima, H
• Kiebooms, R
• Aizawa, H
• Matsuishi, K
• Goto, H
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• Innami, Y
• Kawashima, H
• Kiebooms, R
• Aizawa, H
• Matsuishi, K
• Goto, H

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Materials 2012, 5(2), 317-326; doi:10.3390/ma5020317

Article

Synthesis and Properties of Poly(Isothianaphthene Methine)s with Chiral Alkyl Chain

Yu Innami ¹ , Hirotsugu Kawashima ¹ , Rafaël H. L. Kiebooms ² , Hideaki Aizawa ¹ , Kiyoto Matsuishi ¹  and Hiromasa Goto ^1,*

¹ Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan ² European Patent Office, Patentlaan 3-9, 2288 EE The Hague, The Netherlands

* Author to whom correspondence should be addressed.

Received: 29 December 2011; in revised form: 21 January 2012 / Accepted: 6 February 2012 / Published: 16 February 2012

Download PDF Full-Text [308 KB, uploaded 16 February 2012 14:51 CET]

Abstract: We synthesized poly(isothianaphthene methine)s with chiral alkyl chains in the substituent. Resultant polymers are soluble in THF and CHCl₃. Structure of the polymers was characterized with FT-IR, FT-Raman, and UV-Vis-NIR optical absorption spectroscopy. They showed low-bandgap both in solution and in a form of film. Optical activity of the polymers was confirmed with optical rotatory dispersion. Doping effects on the polymer were also examined with UV-Vis-NIR spectroscopy and ESR measurement.

Keywords: π-conjugated polymer; low-bandgap polymer; isothianaphthene; chiroptical activity

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