MOSSBAUER STUDY OF A RIGID ORGANIC MICROEMULSION USED AS CARRIER FOR FIXING A METHANOLIC SOLUTION OF ASCORBIC-ACID COMPLEXES OF IRON

A Mossbauer spectroscopic study of the system iron(II) chloride+ascorb ic acid dissolved in methanol, containing the iron(II)-ascorbate compl ex cation in equilibrium with chloride ions, revealed that when the me thanolic solution was fixed as submicroscopic (nanosize) droplets in t he cavities in a solid carrier (microemulstion or porous silicate), th ere was a significantly decreased electric field gradient around the i ron centre, indicating the direct coordination of chloride to the iron (II), leading to an ascorbate-chloro mixed complex. The change is due to the different solvation of the species in the nanosize holes in the carrier.