2,4-二氨基-6-苯基-1,3,5-三嗪聚席夫碱Fe^(2+)配合物的合成及性能研究  

SYNTHESIS AND PROPERTIES OF POLY(SCHIFF-BASE)-Fe ^(2+) COMPLEXES CONTAINING 2,4-DIAMINO-6-PHENYL-s-TRIAZINE

作　　者：刘志超[1] 孙维林[1] 刘爽[1] 沈之荃[1] 

机构地区：[1]浙江大学高分子科学与工程系,杭州310027

出　　处：《高分子学报》2004年第5期667-672,共6页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目 (基金号 90 10 10 0 6)

摘　　要：以 2 ,4 二氨基 6 苯基 1,3,5 三嗪 ,2 ,2′ 二氨基 4 ,4′联噻唑 (DABT) ,苯二甲醛及乙二醛等为原料 ,合成了 6个新型结构的含芳杂环聚席夫碱 (DAPIPA ,DAPTPA ,DAPA ,DAPGPBTGZ ,PBTPZ) ,并制备了 2个Fe2 +配合物 (PBTGZ Fe2 + ,PBTPZ Fe2 + ) .利用FTIR和1 H NMR对聚合物的结构进行了表征 ,通过对其中 3个聚席夫碱的热失重分析 ,表明聚合物具有良好的耐热性能 ,借助多功能材料物理特性测试系统 (PPMS :physicalpropertymeasurementsystem)测定配合物的磁性能 ,测定结果表明这些配合物具有相对较高的磁饱和强度 (σs) ,且有典型的S型磁滞回线 ,表明配合物是有机软铁磁体 .The synthesis of six novel poly(schiff-base)s,such as PBTGZ,which is obtained by polycondensation of 2,4-diamino-6-phenyl-s-triazine and 2,2′-diamino-4,4′-bithiazole (DABT) with glyoxal.The polycondensation was processed under acidic condition with the effect of acetic acid.The preparation of two complexes of Fe 2+ are described.Their structures were determined by FTIR and 1H-NMR,The values of [η] were obtained at 30℃ by using an Ubbelodhe viscomter with capillary diameter of 0.55 mm.The decomposition temperatures of DAPTPA,DAPIPA and DAPA obtained by thermogravimetic analysis were all above 300℃,indicating good thermal stability.The temperature dependence of magnetization at an applied field 2.39×106 A/m and the applied field dependence of magnetization at 5 K for the Fe 2+ complexes were measured by PPMS (physical property measurement system).The saturation values of magnetization of PBTPZ-Fe 2+ and PBTGZ-Fe 2+ were 5.4 Am2/kg and 2.6 Am2/kg,and the coercive force of the complexes were 7564 A/m and 75876 A/m,respectively.The “S' shape of magnetic hysteresis loop for PBTPZ-Fe 2+ and PBTGZ-Fe 2+ and their values of residual magnetization 0.165 Am2/kg and 0.011 Am2/kg indicated they were soft magnets.The existence of benzenes ring enlarges the distance of two adjacent Fe 2+ ions,which causes the difference of the magnetic properties of the two complexes.

关 键 词：2 4-二氨基-6-苯基-1 3 5-三嗪 2 2'-二氨基-4 4’联噻唑 苯二甲醛 乙二醛 2 4-二氨基-6-苯基-1 3 5-三嗪聚席夫碱Fe^2+配合物 有机磁体 

分 类 号：O641.4[理学—物理化学]