Stability of Fe(III) and Sn(IV) Metalloporphyrins Adsorbed on Cation-Exchanged Montmorillonite

The iron(III)tetraphenylporphyrin chloride Fe(III)TPPCl, iron(III)tetra-naphthylporphyrin Fe(III)TNPCl, ?-oxo-bis[tetraphenylporphyriniron(III)] [(Fe(III)TPP)2O], ?-oxo-bis[tetranaphthylporphyriniron(III)] [(Fe(III)TNP)2O], tin(IV)tetraphenylporphyrin Sn(IV)TPPCl2 and tin(IV)tetra-naphthylporphyrin Sn(IV)TNPCl2 complexes were all found to be adsorbed onto the montmorillonite MMT clay without demetallation. evidence from visible absorption diffuse reflectance spectra showed that species present on are metallated form. Also Mossbauer spectroscopy confirm these findings. only process occurs is dimeric form of iron underwent transformation monomeric clay-complex systems characterized using spectra, X-ray diffraction, Electron microscopy.
 HIGHLIGHTS
 
 Sn(IV)TPPCl2, porphyrin demetallation
 forms [(Fe(III)TPP)2O] [(Fe(III)TNP)2O converted when clay
 weak acidity does not have ability cause demetallation metallo porphyrin