Application of a water stable zinc(II) glutamate metal organic framework for photocatalytic degradation of organic dyes

摘要

A water stable metal-organic framework (MOF) having structural formula {[Zn(Hsub2/subO)(L)]?xsolvent}subn/sub (L = glutamate) ( 1 ), was prepared in aqueous medium by simple mixing the Zn(II) salt and glutamate ligand at room temperature. The single crystal X-ray diffraction study indicates that 1 crystallizes in an orthorhombic system with a space group of P2sub1/sub2sub1/sub2sub1/sub in which the Zn(II) center adopts pseudo-octahedral geometry. The bridging interactions through carboxylate groups in 1 generates a 2D structure in 1 comprising of the microporous channels. The UV/Vis diffuse-reflection spectroscopy for 1 had been performed which indicated that MOF possess semiconducting nature with a band gap of 3.23 eV and therefore may be a potential candidate as photocatalyst. The photocatalytic behavior of 1 against photo-degratdation of organic dyes has been investigated. The possible photocatalytic activity of 1 against organic dyes have been addressed using density of states (DOS) calculations.