Loading...
Search for:
copper-sites
0.005 seconds
Spectroscopic evidence on improvement in complex formation of O2N2 aza-crown macrocyclic ligands with Cu(II) acetate upon incorporation with [60]fullerene
, Article Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy ; Volume 169 , 2016 , Pages 202-207 ; 13861425 (ISSN) ; Gholamnezhad, P ; Sharif University of Technology
Elsevier B.V
2016
Abstract
The present paper reports the spectroscopic investigations on the complexation of Cu(II) with two macrocyclic ligands bonded to [60]Fullerene (L1 and L2) measured in N-methylpyrrolidone (NMP) as solvent. On the basis of UV–vis-NIR spectroscopy applying Jobs method of continuous variation, typical 1:1 stoichiometries were established for the complexes of Cu(II) with L1, and L2. DFT calculations suggested that superior HOMO distributions spread over the nitrogen-donor (as well as somehow oxygen- donor in L2) groups of L1 and L2 macrocycles were the key factor for the observed Kb value enhancement. Thermodynamic stabilities for these complexes have also been determined employing...