Cu2+-Citrate Dimer Complexes in Aqueous Solutions

Autor:	Robin Cox, Yahia Z. Hamada, Hasan Hamada
Rok vydání:	2015
Předmět:	chemistry.chemical_compound Aqueous solution chemistry Dimer Potentiometric titration Inorganic chemistry Citric acid Spectral line
Zdroj:	Journal of Basic & Applied Sciences. 11:583-589
ISSN:	1927-5129 1814-8085
DOI:	10.6000/1927-5129.2015.11.78
Popis:	The UV-Vis spectra, speciation diagrams, and potentiometric profiles for Cu2+-citrate complexesin aqueous solutions are presented. As the pH increases from 2.29 to 5.15, the UV-Vis spectral profile of the Cu2+-citrate complexes showed a blue shift from 820 nm to 760 nm. We have set the conditions to construct the speciation diagram as follow: Cu2+:citric acid was in 1:1 ratio with concentration of 1.0 x 10-4 mol.L-1, 0.1023 mol.L-1 NaOH solution, and pKw = 13.781 ± 0.006 taken from Sweeton, Mesmer, and Baes. The current report is the first potentiometric study that has taken into accounts two Cu-Cit dimeric species to be refined simultaneously. These spectroscopic and potentiometric data are discussed which augment what had been reported in the literature.
Databáze:	OpenAIRE
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