О возможности синтеза β-“ядра” полиоксимолибдата железа (III) в водных растворах

Abstract

This work describes for the first time the conditions for synthesizing a stable form of β-"core" iron (III) polyoxymolybdate (POM) in aqueous solutions in the form of a new molecular ("nuclear") state in a monomeric state. The optimal conditions for the formation of iron (III) POMs were determined from the light absorption of the product of the interaction of molybdate with iron (III) cations in the ultraviolet region of the spectrum. The range of light absorption of POM iron (III), kinetics and optimal acidity concerning changes in acidity, molybdate ion and exposure time after its quantitative formation were established. It has been shown that POM of iron (III) is formed at pH 3.4÷5.4, with the ratio of initial amounts ν (FeIII) :ν (MoVI) = 1:6 and is stable up to 96 hours. It has been established for the first time that, under the developed optimal conditions, iron(III) POM forms a complex associate with a low water solubility with six associated crystal violet (CV) cations, forming a very low water soluble complex associate. The obtained data indicate the formation of a new “β-core” of iron(III) POM with the composition (OH)6[H3FeMo6O18].