MOSSBAUER AND ESR STUDY OF THE EFFECT OF ACID SITES ON FORMATION OF PHTHALOCYANINEIRON(II)-PYRIDINE ADDUCT IN ZEOLITE SUPERCAGE

Phthalocyanineiron(II) (FePc) was synthesized in FeY zeolite supercage with acid sites. Mossbauer spectroscopy was employed to determine the yield of FePc(py)2 produced by contact of FePc with pyridine in it. A lthough the supercage had enough space to form Fepc(py)2, the yield wa s very low. This indicates that pyridine molecule preferably binds to the acid site rather than to the FePc molecules in the supercage with the acid sites. The reactivity of FePc in the zeolite supercage may be controlled by the preparation procedure chosen, which influences the number of acid sites. The degree of aggregation of FePc also affects t he formation of FePc(py)2.