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合成和表征了5个螺旋配位聚合物{[Cu(Hbpma)(H2O)4]2(SO4)3·3.5H2O}n(1)、{[Ni(Hbpma)(H2O)4]4(SO4)6·10.75H2O}n(2)、{[Mn(Hbpma)(H2O)4](SO4)1.5·3H2O}n(3)、{[Zn(Hbpma)(H2O)4]4(SO4)6·4H2O·4CH3OH}n(4)和{[Cu(Hbpma)2(H2O)2](SO4)2·9H2O}n(5),其中bpma代表N,N′-双(3-吡啶甲基)胺。晶体结构分析表明配合物1~4为一维链状结构,配合物5为二维层状结构,其中金属离子由质子化的bpma配体桥连。值得注意的是,采取反-反式构象的柔性bpma配体使得配合物1和2为假螺旋链结构,配合物3和4为螺旋链结构,配合物5为螺旋层结构。同时研究了配合物的磁性和热稳定性。
Synthesis and characterization of five helical coordination polymers {[Cu (Hbpma) (H2O) 4] 2 (SO4) 3 · 3.5H2O} n ) 6 · 10.75H2O} n (2), {[Mn (Hbpma) (H2O) 4] (SO4) 1.5 · 3H2O} n · 4H2O · 4CH3OH} n (4) and {[Cu (Hbpma) 2 (H2O) 2] (SO4) 2 · 9H2O} n where bpma represents N, amine. Crystal structure analysis shows that complexes 1 ~ 4 are one-dimensional chain structures, and complexes 5 are two-dimensional layered structures in which metal ions are bridged by protonated bpma ligands. Notably, the flexible bpma ligands that adopt the trans-trans configuration make complexes 1 and 2 a pseudo-helical chain structure, complexes 3 and 4 are helical chain structures, and complex 5 is a helical layer structure. The magnetic and thermal stability of the complexes were also studied.