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A.M. Amado, M. Aureliano, P.J.A. Ribeiro-Claro, J.J.C. Teixeira-Dias
The Raman spectra of aqueous vanadium (V) solutions at different pH
values, ranging from 13.1 to 7.0, are presented. The dominant bands
in the range 700-1100 cm-1 are assigned to the VO symmetrical
stretching of the different oligomers, using additional information
from 51V NMR spectra and empirical models. The effects of
pH, concentration and ionic strength on the oligomerization
equilibria are discussed. The ionic strength is found to affect
significantly the oligomer composition of vanadate solutions, which
is of interest in biochemical and biological studies.
Journal of Raman Spectroscopy 24, 699-703 (1993)
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