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Published in:

01-10-2011

Synthesis of a low-bandgap polymer bearing side groups containing phenoxy radicals

Authors: Yu Innami, Rafaёl H. L. Kiebooms, Tamotsu Koyano, Masaaki Ichinohe, Satoshi Ohkawa, Kohsuke Kawabata, Masataka Kawamatsu, Kiyoto Matsuishi, Hiromasa Goto

Published in: Journal of Materials Science | Issue 20/2011

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Abstract

Poly(isothianaphthene methine) bearing di-tert-butylphenoxide in the side chain was prepared by reacting isothianaphthene and 3,5-di-tert-butyl-4-hydroxybenzaldehyde in the presence of POCl₃. A reference polymer with no hydroxy group in the side chain was also synthesized. Both polymers are characterized by a low-bandgap with value of ca. 1.3 eV obtained by optical absorption spectroscopy, and ca. 1.7 eV estimated from an electrochemical method. After treatment with PbO₂ as an oxidizer, phenoxy radicals were generated by oxidation in the polymer side groups. Optical absorption measurements and electron spin resonance (ESR) showed a characteristic signal due to phenoxy radicals. Magnetic properties of the polymer were examined with ESR and superconducting quantum interference device (SQUID) measurements. The results suggested that the polymer shows paramagnetic behavior.

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Title: Synthesis of a low-bandgap polymer bearing side groups containing phenoxy radicals
Authors: Yu Innami
Rafaёl H. L. Kiebooms
Tamotsu Koyano
Masaaki Ichinohe
Satoshi Ohkawa
Kohsuke Kawabata
Masataka Kawamatsu
Kiyoto Matsuishi
Hiromasa Goto
Publication date: 01-10-2011
Publisher: Springer US
Published in: Journal of Materials Science / Issue 20/2011
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-011-5602-9

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