Oxidovanadium(IV) Salicylidene Glycine Complex with Phenanthroline as Co-ligand: Synthesis, Characterization, and Catalytic Degradation of Methyl Orange with H₂O₂

A Schiff base oxidovanadium complex derived from glycine and salicylaldehyde with phenanthroline as co-ligand viz. [VO(salgly)(phen)]·4H₂O (1) (where salgly is a Schiff base derived from salicylaldehyde and glycine, phen is 1,10-phenanthroline) was synthesized under ambient conditions. The complex was characterized by elemental analysis and spectroscopic techniques such as FT-IR and UV-vis. The structure of the complex was determined by single crystal X-ray diffraction with lattice parameters a = 10.4250(3) Å, b = 14.3372(5) Å, c = 16.9186(6) Å, α = 70.2390(10)°, β = 88.9690(10)°, γ = 81.4790(10)°, P-1 space group, Z = 4. The asymmetric unit of complex 1 consists of two crystallographically unique V(IV) centers along with four water molecules of crystallization. The crystal packing of 1 is stabilized by π···π stacking and C–H···O hydrogen bonding interactions. Thermogravimetric analysis (TGA) of the complex was carried to determine its thermal stability. Moreover, complex 1 showed good catalytic activity for the degradation of methyl orange (MO) in presence of hydrogen peroxide.