Saeed Rayati - Department of Chemistry, K.N. Toosi University of Technology, P.O. Box ۱۶۳۱۵-۱۶۱۸, Tehran ۱۵۴۱۸, Iran
Elham Khodaei - Department of Chemistry, K.N. Toosi University of Technology, P.O. Box ۱۶۳۱۵-۱۶۱۸, Tehran ۱۵۴۱۸, Iran

One of the major drawbacks of homogeneous catalysis is the need to separate the catalysts from the reaction mixture at the end of the reaction. In addition, contamination by the metal catalysts restricts their use in industry. Nowadays, many researchers use different techniques to recover the homogeneous catalysts. Among all supports, zeolite is an excellent material to use in a transition metal ion exchange because of its low cost and an intra-crystalline cavity [1-4]. In this study to perform selective oxidation of sulfides to sulfoxides, copper(II) Schiff-base complexes encapsulated in Na-Y zeolite under various reaction conditions have been investigated [5-7].