Iron(III), Chromium(III), and Copper(II) Complexes of l-Norvaline and Ferulic Acid

The complexation equilibria of l-norvaline (Nva) and ferulic acid (FA) were studied in aqueous solutions at room temperature (298 K) and in fixed ionic strength (0.15 mol·dm−3 NaNO3) by means of potentiometry and spectrophotometry techniques. The ferric (Fe3+), chromium (Cr3+), and cupric (Cu2+) com...

Full description

Saved in:
Bibliographic Details
Published inJournal of chemical and engineering data Vol. 56; no. 3; pp. 532 - 540
Main Authors Angkawijaya, Artik Elisa, Fazary, Ahmed E, Hernowo, Erzalina, Taha, Mohamed, Ju, Yi-Hsu
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 10.03.2011
Subjects
Chemistry
Coordination compounds
Exact sciences and technology
Inorganic chemistry and origins of life
Preparations and properties
Divalent metal Complexes
Phenolic acid
Organic ligand
Stability constant
Transition metal Complexes
Trivalent metal Complexes
Potentiometry
Ferulic acid
α-Aminoacid
Iron III Complexes
Copper II Complexes
Chromium III Complexes
Norvaline
Online AccessGet full text

Cover

More Information
Summary:The complexation equilibria of l-norvaline (Nva) and ferulic acid (FA) were studied in aqueous solutions at room temperature (298 K) and in fixed ionic strength (0.15 mol·dm−3 NaNO3) by means of potentiometry and spectrophotometry techniques. The ferric (Fe3+), chromium (Cr3+), and cupric (Cu2+) complexing capacities of Nva and FA and their overall stability constants in aqueous solutions were obtained by the HYPERQUAD 2008 program from the potentiometric data. The concentration distributions of the various complex specia in solution were evaluated and discussed. The spectroscopic UV−visible measurements are carried out to give qualitative information about the confirmation of the complexes formed in these solutions.
ISSN:0021-9568
1520-5134
DOI:10.1021/je101075q