Organophosphate hydrolase conjugated UiO-66-NH MOF based highly sensitive optical detection of methyl parathion.

The hexahistidine-tagged organophosphorus hydrolase (OPH) has been immobilized on a Zr-MOF, namely UiO-66-NH. The resulting enzyme-MOF composite was used as a carrier to facilitate the hydrolysis of an organophosphate pesticide, i.e.

A study of DNA/BSA interaction and catalytic potential of oxidovanadium(v) complexes with ONO donor ligands.

The study of DNA/BSA interaction and the catalytic potential of four mononuclear oxidoalkoxido vanadium(v) [VO(L)OEt] (1-4) and one dinuclear oxidoalkoxido mixed-ligand vanadium(v) [{VO(L)OEt}(Q)]{Q = 4,4'-bipyridine}(5) complexes, with tridentate binegative aroylazine ligands are reported [where HL = anthranylhydrazone of 2-hydroxy-1-napthaldehyde, HL = salicylhydrazone of 2-hydroxy-1-napthaldehyde, HL = benzoylhydrazone of 2-hydroxy-1-acetonaphthone, HL = anthranylhydrazone of 2-hydroxy-1-acetonaphthone]. All the complexes are characterized by elemental analysis as well as various spectroscopic techniques. Single crystal X-ray diffraction crystallography of 2 reveals that the metal centre is in distorted square pyramidal geometry with ON coordination spheres, whereas 5 exhibits a distorted octahedral geometry around the metal center.