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Synthesis and characterization of conjugated polymers with imino nitroxide groups

✍ Scribed by Robert Saf; Petra Swoboda; Andreas Lechner; Klaus Hummel; Rainer Czaputa

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
396 KB
Volume
197
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Two new conjugated polyradicals with imino nitroxide groups, poly[2‐(3,4‐diethynylphenyl)‐4,4,5,5‐tetramethylimidazolinyl‐1‐oxyl] (3) and poly[2‐(3,5‐diethynylphenyl)‐4,4,5,5‐tetramethylimidazolinyl‐1‐oxyl] (4), were prepared. Spectroscopic methods (IR, UV, ESR, MS) were used for the characterization. The polyradicals were precipitated from pyridine/methylene chloride solution by hexane and investigated magnetically. In the temperature range 78–300 K, polyradical 3 was paramagnetic. The magnetic behavior of polymer 4 pointed to very weak antiferromagnetism. The magnetic properties of 3 and 4 were compared to those of previously described corresponding polymers containing nitronyl nitroxide groups.

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