含双噻唑高分子及其螯合物的制备和磁性能研究进展

设计和合成有机及高分子磁性材料是当前国内外十分关注的课题,本课题组在先前研究的基础上,以电子理论和磁性理论为指导,从分子设计出发,合成出含双噻唑新型芳杂环聚合物及其过渡金属离子或稀土离子螯合物,测定了它们的磁性能,研究高分子结构、螯合物组成与磁性能的关系,探索产生磁性的机理.发现本研究体系的高分子螯合物具有顺磁居里温度(Tp)高,剩余磁场(Mr)少,矫顽力(Hc)低,是一类很好的软磁性材料,呈现出有一定特色的磁性能.本文综述了含双噻唑高分子过渡金属螯合物、稀土金属螯合物、纳米碳管接枝高分子及其螯合物的制备和磁性能研究,以及典型螯合物的非常规磁性现象的发现和机理探索研究.

PROGRESS IN STUDY ON SYNTHESIS AND MAGNETIC PROPERTIES OF NOVEL POLYMER COMPLEXES CONTAINING BITHIAZOLE RING

In order to search for high quality polymeric magnets,several kinds of polymers containing bithiazole were designed and synthesized based on electronic and magnetic theories,and their complexes with transition metal ions or rare earth metal ions were prepared.The influential conditions for synthesis and preparation were investigated and the target molecules were characterized with IR, NMR, EA, SEM, TEM et al.Magnetic properties of polymeric complexes,for example,the magnetization versus applied field,magnetic susceptibility as a function of temperature,magnetic hysteresis loop,were determined,and their relationship with molecular composition,structure and morphology was studied.It was found that these polymeric complexes are good soft ferromagets with very small remanence magnetization (M_r) and the coercivity (H_c).It was described that some polymeric complexes of rare earth ions exhibited unusual magnetic phenomena which cannot be interpreted by the theory or hypotheses of conventional ferromagnets.