摘要
series of fourβ-diketone mononuclear dysprosium complexes,namely,Dy(DBM)_(3)(bpy)(1),Dy(DBM)_(3)(phen)·Tol(2),Dy(DBM)_(3)(dpq)·Tol(3),and Dy(DBM)_(3)(dppz)(4)(bpy=2,2’-bipyridine,phen=1,10-phenanthroline,dpq=dipyrazine[2,3-f:2’,3’-h]quinoxaline,dppz=dipyrido[3,2-a:2’,3’-c]phenazine,Tol=toluene)have been isolated by the reactions of dibenzoylmethane(DBM),azacyclo-auxiliary ligands and DyCl_(3)·6H_(2)O.X-ray crystallographic analysis reveals that complexes 1–4 are all eight-coordinate mononuclear structures.The azacyclo-auxiliary ligands have a dramatic effect on the structure and magnetic characteristics of complexes 1–4,originating from the different degrees of deviation from the ideal coordination symmetries.Complexes 1 and 2 display a single relaxation mode under 0 Oe and complexes 3 and 4 display two single relaxation modes under 2000 Oe.
基金
supported by the National Natural Science Foundation of China(no.21471051 and 51402092).
