I have leached V-bearing waste, where V was in the form of V2O5 salts, with citric acid. The solution has blue color, indicating the presence of VO2+ ion (also confirmed by matching appropriate field on Pourbaix diagram for V). My question is, what can be the relation between citric acid and VO2+? And how to check this, by analysis or by some calculations?
Dear Bartosz,
Citrate is a natural chelator which readily forms coordination complexes with metal ions, like for instance vanadyl ions. There is a substantial amount of literature on citrate-vanadyl coordination complexes, please have a look at https://pubs.acs.org/doi/pdf/10.1021/ic010276n?rand=mp9a8xlc which shows this that this complexation is pH-dependant. If you can separate the complex, elemental analysis (carbon versus vanadium) will reveal the exact coordination number.
Hope this helps, kind regards, Leo
Dear Bartosz,
Citrate is a natural chelator which readily forms coordination complexes with metal ions, like for instance vanadyl ions. There is a substantial amount of literature on citrate-vanadyl coordination complexes, please have a look at https://pubs.acs.org/doi/pdf/10.1021/ic010276n?rand=mp9a8xlc which shows this that this complexation is pH-dependant. If you can separate the complex, elemental analysis (carbon versus vanadium) will reveal the exact coordination number.
Hope this helps, kind regards, Leo
I agree with the previous answer. I also would encourage you to explore this question in SciFinder Scholar. A simple ChemDraw-like interface exists in there for you to have V and citric acid or to use them as search terms. A good science librarian can aid in this. The interest in the bioinorganic community with such ligands led to a lot of work. Volumes edited by Sigel and Sigel might contain some of that. Martell has an extensive series on ligands and metal ions for binding constants, etc. Also If crystallized, the Cambridge Crystallographic Database might an excellent resource.
This article may be helpful to you: Journal of Cluster Science. 2014; 25(1): 323-334.
Hello
you can see these papers.
Vanadium : leaching and solvent extraction (Tavakolikhaledi, Mohammadreza)
SYNTHESIS, CHARACTERISATION AND POTENTIAL APPLICATION OF VANADIUM COMPLEXES
Complexation between vanadium(V) and citrate: spectroscopic and structural characterization of a dinuclear vanadium(V) complex
Book (By Dieter Rehder): Bioinorganic Vanadium Chemistry
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