Under hydrothermal conditions,three novel complexes {[Co(en)3]·[KLa2(C2O4)5(H2O)6]·H2O}n(HNU-9),{[Co(dien)2] [La2(C2O4)4(H2O)2]·x H2O}n(HNU-11) and {K3[Co(dien)2] [La4(C2O4)9(H2O)2]·5H2O}n(HNU-12) were synthesized by using Co(Ⅲ) complexes as template.Different templates([Co(en)3]~(3+),[Co(dien)2]~(3+),K++[Co(dien)2]~(3+))exist in compounds in different ways,leading to different three-dimensional framework structures.Interesting,the structures of HNU-11 and HNU-12 present the novel topology structure due to ...