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Thermodynamic studies on complexation of dopamine with gadolinium(III) in water–ethanol system

✍ Scribed by Azar Bagheri Gh

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
223 KB
Volume
156
Category
Article
ISSN
0167-7322

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✦ Synopsis

The stability constant for complexation of gadolinium(III) with dopamine in mixed solvent systems of ethanol + water and free-energy changes have been determined spectro-photometrically with a temperature variation method in 0.2 mol dm -3 sodium chloride as ionic medium employed at [(15, 25 and 35 ± 0.1) °C] at pH ranges of ~5 to ~7.5 with a high ratio of ligand to metal. The effect of solvent systems on protonation and complexation are discussed. Linear relationships are observed by plotting log K versus 1/D, where K and D are the stability and dielectric constants, respectively.

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