【摘要】 合成了一系列哌啶氮氧自由基取代的聚丁二炔,其结构差别在于哌啶氮氧自由基与叁键之间的距离不同。通过对这类聚合物磁性的研究,提出了聚合物中两种自旋体系(一个属于全共轭链,另一个属于哌啶氮氧自由基)的空间相互作用产生宏观铁磁性的理论模型。更多还原

【Abstract】 Several kinds of polydiacetylene with different length of highly-stable nitroxyl radicals of the piperidine series as side groups are synthesized. The static magnetic susceptibility and the magnetization of the polydiacetylenes are measured with an extracting sample magnetometer. A simple ferromagnetic interection model for polydiacetylenes with stable radicals as side groups is proposed. The model holds that the ferromagnetism originates from a through-space interaction of the two spin systems-one belonging to the fully conjugated main chain and the other to the stable radical side groups更多还原