Abstract
A water stable metal-organic framework (MOF) having structural formula {[Zn(H 2 O)(L)]∙xsolvent} n (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 P2 1 2 1 2 1 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. KEY WORDS : Glutamate, MOF, DOS, Photocatalysis Bull. Chem. Soc. Ethiop. 2019 , 33(1), 43-50 DOI: https://dx.doi.org/10.4314/bcse.v33i1.4
Highlights
During the last few years the metal-organic frameworks (MOFs) have received extensive attention as they find applications as a promising photocatalyst in decomposing organic dyes owing to their high specific surface area and high light absorption abilities [1,2,3,4]
The wellknown MOF-5 for phenol degradation under UV light irradiation have already been demonstrated to have semiconducting properties for photo-electronics and photocatalysis [5], lately, a 2-fold interpenetrated porous MOF [Zn4O(2,6-ndc)3(DMF)1.5(H2O)0.5]·4DMF·7.5H2O (H22,6-ndc =2,6’- naphthalenedicarboxylic acid) (UTSA-38) had been used for the degradation of methyl orange (MO) in aqueous solution under UV [6]
Some few reviews have been published which encompasses the applications of MOFs in the area of photocatalysis and artificial photosynthesis [8,9,10]
Summary
During the last few years the metal-organic frameworks (MOFs) have received extensive attention as they find applications as a promising photocatalyst in decomposing organic dyes owing to their high specific surface area and high light absorption abilities [1,2,3,4]. A UiO-66(NH2) MOF has shown visible-light-responsive photocatalytic activity toward the degradation of organic dyes [7]. It is important to synthesize stable MOFs that can be used for degradation of organic dyes.
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