Synthesis, structural investigation and kinetic studies of uranyl(VI) unsymmetrical Schiff base complexes

0440632 - FZÚ 2015 RIV IN eng J - Článek v odborném periodiku
Asadi, Z. - Asadi, M. - Zeinali, A. - Ranjkeshshorkaei, M. - Fejfarová, Karla - Eigner, Václav - Dušek, Michal - Dehnokhalaji, A.
Synthesis, structural investigation and kinetic studies of uranyl(VI) unsymmetrical Schiff base complexes.
Journal of chemical sciences. Roč. 126, č. 6 (2014), s. 1673-1683. ISSN 0974-3626. E-ISSN 0973-7103
Grant CEP: GA ČR(CZ) GAP204/11/0809
Institucionální podpora: RVO:68378271
Klíčová slova: uranyl schiff base complexes * kinetic study * kinetics of thermal decomposition * X-ray crystallography * cyclic voltammetry
Kód oboru RIV: CA - Anorganická chemie
Impakt faktor: 1.191, rok: 2014

Uranyl(VI) complexes with unsymmetrical N2O2 Schiff base ligands were synthesized and characterized. Their characterization was performed using UV-Vis, 1H NMR, cyclic voltammetry, single-crystal X-ray crystallography, IR, TG and C.H.N. techniques. X-ray crystallography of the complexes show that beside coordination of the tetradentate Schiff base, one DMF molecule is also coordinated. In order to investigate the effect of the substitutional groups of the Schiff base on the oxidation and reduction potentials, we used the cyclic voltammetry method. Electrochemistry of these complexes showed that th e presence of electron releasing groups accelerates oxidation of the complexes. The kinetics of thermal decomposition was studied using thermal gravimetric method (TG) and Coats-Redfern equation. According to Coats-Redfern plots, the kinetics of thermal decomposition of the studied complexes is first-order in all stages.
Trvalý link: http://hdl.handle.net/11104/0243753