N-donor position-induced diverse architectures of polyoxovanadate-based hybrid materials: Structures, fluorescence and photocatalytic activities

Abstract

Two new inorganic–organic hybrid complexes derived from polyoxovanadate and different bis-pyridyl-bis-amide ligands, (3-dpye=N,N′-bis(3-pyridinecarboxamide)-1,2-ethane, 4-dpye=N,N′-bis(4-pyridinecarboxamide)-1,2-ethane): [V2O6Zn(4-dpye)]n (1) and {[Zn(3-Hdpye)(H2O)5]2[V10O28]}·4H2O (2), have been hydrothermally prepared. In complex 1, the [V4O12]4− clusters were connected by ZnII ions to generate a 2D inorganic layer, which is further linked by the μ2-bridging 4-dpye ligands to form a 3D metal-organic framework. In complex 2, the [V10O28]6− clusters connect with discrete zinc cation complex [Zn(3-Hdpye)(H2O)5]3+ through hydrogen bonds to generate a 2D supramolecular network. The N-donor position of organic ligands and V2O5 raw materials show great effect on the final structures. The fluorescence properties and the photocatalytic activities of the title complexes have been investigated.