Health & Environmental Research Online (HERO)


Print Feedback Export to File
5364404 
Journal Article 
The Electrocatalytic Activity of Pyrazolyl-thioimidazolyl borate-based Zinc(II) Complexes Towards the Hydrolysis of Tris(p-nitrophenyl)phosphate 
Mersal, GAM; Ibrahim, MM; Fadllalh, S; El-Sheshtawy, HS; Al-Malki, MMB 
2017 
Yes 
International Journal of Electrochemical Science
ISSN: 1452-3981 
12 
1 
710-725 
WOS:000396470000060 
Two zinc(II) compounds of pyrazolyl-thioimidazolyl containing ligands of the types [HB(Pz(MePh))(Tt(OMe))(2)ZnCl] 1 and [HB(Pz(MePh))(TtOMe)(2)ZnClO4] 2 were synthesized and characterized as new electrocatalysts for the hydrolysis of the phosphotriester tris(4-nitrophenyl) phosphate (TPP). Their structures were characterized spectroscopically by infrared and H-1-C-13 NMR spectroscopies as well as elemental analysis and thermal analysis. The zinc atoms adopt distorted tetrahedral geometry with coordination chromophores ZnS2NCl and ZnS2NO for complexes 1 and 2, respectively. The electrochemical behavior of the obtained zinc complexes-modified carbon paste electrode (Zn-CPE) has been studied by cyclic voltammetry. The Zn-CPE shows good electrocatalytic activities toward the hydrolysis of TPP, generates the oxidized p-nitrophenol at the surface of CPE. Several parameters were investigated to evaluate the performance of the biomimetic sensor obtained after the incorporation of zinc(II) complexes 1 and 2 in a carbon paste electrodes. 
Pyrazolyl-Thioimidazolyl borate containing ligand Biomimetic sensors; Electrocatalytic; DFT calculations