Oligomers of poly(thiophene) and poly(ortho-phenyleneethynylene) having pendant S = 1/2 semiquinone radicals (as complexes of cobalt(III)) have been prepared and characterized by electron paramagnetic resonance (EPR) spectroscopy and magnetic measurements (superconducting quantum interferences device = SQUID magnetometry). Our results show that exchange coupling of semiquinone groups along a polythiophene backbone is greater than the corresponding coupling along a poly(ortho-phenyleneethynylene) backbone.

中文翻译：

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寻找稳定的高自旋聚合物

已经制备了具有侧链 S = 1/2 半醌自由基的聚（噻吩）和聚（邻苯乙炔）的低聚物（作为钴（III）的配合物），并通过电子顺磁共振 (EPR) 光谱和磁测量（超导量子干扰装置 = SQUID 磁力计）。我们的结果表明，半醌基团沿聚噻吩骨架的交换耦合大于沿聚（邻苯乙炔）骨架的相应耦合。