The interaction of the vanadyl(IV) cation with phytic acid.
The interactions of VO2+ with phytate to form both soluble and insoluble complexes, have been studied by electronic absorption spectroscopy. A soluble 1:1 VO2+:phytate complex is formed at pH < 1. At higher pH-values insoluble complexes are produced. Two different solid complexes, obtained respectively at pH = 2 and 4, were isolated and characterized. The maximal bonding ratio of VO2+:phytate was found to be 4, on the basis of a pH binding profile.
Williams
P A
PA
Química Inorgánica (QUINOR), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Argentina.
Baran
E J
EJ
D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D010710:Phosphates / Q000737:chemistry; D010833:Phytic Acid / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014639:Vanadium / Q000737:chemistry*
D010710:Phosphates; D014639:Vanadium; D010833:Phytic Acid