Copper(II)-directed self-assembly led to a dinuclear complex and a 1D chain with empirical formula [Cu(2,2?-
bpy)(HL)(L)]2(NO3)2 /(H2O)3/2 (1) and {[Cu(2,2?-bpy)(4,4?-bpy)1/2(L)] (ClO4) /(1/2H2O)}n (2) (L is p-aminobenzoate), respectively.
X-ray single crystal structural analyses indicated that the [Cu2(2,2?-bpy)2(L)2] unit was present in both compounds.