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在水热条件下,以N-氧化-2-吡啶膦酸(H2L)为主配体,4,4′-联吡啶(bpy)为桥联配体,合成了3个铜有机膦酸配合物:{[Cu(L)(bpy)0.5(H_2O)]·2H_2O}n(1),{[Cu(HL)2(bpy)]·4H_2O}n(2)和{[Cu2(L)2(bpy)]·3H_2O}n(3)。配合物1中,相邻的铜离子由2个膦酸根连成二聚体,二聚体之间通过bpy桥联成一维链。配合物2中,单核[Cu(HL)2]被bpy连接成一维链。配合物3中,四聚体[Cu2(L)2]2被bpy连接成“砖块状”结构的二维层。磁性研究表明,配合物1和3中铜离子之间存在反铁磁性耦合。
Under hydrothermal conditions, 3 copper (Ⅱ) organophosphonic acid complexes were synthesized using 4,4’-dipyridyl (bpy) as ligand and N-oxide-2-pyridinephosphonic acid (H2L) : {[Cu (L) (bpy) 0.5 (H 2 O)] · 2H 2 O} n (1), {[Cu (HL) 2 (bpy)] · 4H 2 O} n (2) and {[Cu 2 (L) 2 bpy)] · 3H_2O} n (3). In complex 1, the adjacent copper ions are connected into two dimers by two phosphonates, and the dimers are connected into one-dimensional chain through bpy bridge. In complex 2, mononuclear [Cu (HL) 2] is bpy linked into one-dimensional chain. In complex 3, the tetramer [Cu2 (L) 2] 2 was bpy linked into a “brick-like” two-dimensional structure. Magnetic studies show that complexes 1 and 3 in the presence of antiferromagnetic coupling between copper ions.