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guggenheim-s-method
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Spectroscopic and thermodynamic studies of interaction between dopamine and cobalt (III) schiff-base complexes
, Article Scientia Iranica ; Volume 16, Issue 2 C , 2009 , Pages 89-93 ; 10263098 (ISSN) ; Boghaei, D. M ; Sharif University of Technology
2009
Abstract
In this paper, the interactions of cobalt(III) tetradentate Schiff-base complexes, [Co(S-MeO-salophen)]ClO4, (1), [Co(5-NO 2-salophen)]ClO4, (2), and [Co(5-Br-salophen)]ClO 4, (3), with dopamine, an important neurotransmitter, have been investigated. The formation and kinetic constants for complex formation of [Co(3-MeO-salophen)]ClO4, (1), with dopamine were determined spectrophotometrically in H2O/EtOH solution (4:1) at 30°C by using the Benesi-Hildbrand and Guggenheim equations, respectively. The stoichiometry has been found to be 1:1. The rate and equilibrium constants for the coordination of dopamine to (Co(3-MeO-salophen)]ClO4 were found to be 0.0053 min-1 and 1600 dm3 mol-1,...