Premium
Synthesis, Electrochemical and Luminescence Studies of Nickel and Vanadium Complexes Containing Tetradentate Schiff Base Ligand with N 2 O 2 Donor Atoms
Author(s) -
Shafaatian Bita,
Maasoumi Elham
Publication year - 2015
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201400382
Subject(s) - chemistry , ligand (biochemistry) , schiff base , molar conductivity , nickel , vanadium , thiourea , inorganic chemistry , metal , stoichiometry , tetrahedral molecular geometry , electrochemistry , imine , crystallography , elemental analysis , organic chemistry , catalysis , biochemistry , receptor , electrode
A symmetrical tetradentate Schiff base ligand was derived by the condensation of ortho ‐vanillin and thiourea in 2:1 molar ratio and adjusted pH. Nickel and vanadyl complexes were obtained using the template method by the reaction of ortho ‐vanillin and thiourea with Ni(OAc) 2 . 4H 2 O and VO(acac) 2 (2:1:1 molar ratio) in absolute ethanol and adjusted pH. The Schiff base ligand and its complexes have been characterized by FT‐IR, 1 H NMR, UV/Vis, elemental analysis and conductometry measurements. In nickel and also vanadyl complexes the ligands were coordinated to the metals via the imine N and enolic O atoms. The complexes have been found to possess 1:1 metal to ligand stoichiometry and the molar conductance data revealed that the metal complexes were non‐electrolytes. The nickel and vanadyl complexes exhibited tetrahedral and square pyramidal coordination geometry, respectively. The emission spectra of the ligand and its complexes were studied in DMSO. Electrochemical properties of the ligand and its complexes were also investigated in the DMF solvent at the 150 mVs ‐1 scan rate. The ligand and its complexes showed irreversible processes at this scan rate.