محمدعلی زلفی گل

Among of magnetic nanoparticles (MNPs), nano magnetic core-shell structures have been highly applied in bio and environmental researches. Magnetic core-shell, consisting of an iron oxide core and a silica shell, have attracted more attention for their unique magnetic properties, low cytotoxicity, good stability, and chemically modifiable surface.1 On the other hands, phthalocyanines (Pcs) find versatile applications in the area of material science because of their distinctive optical and electrical properties as well as their chemical and thermal stability.2 Therefore, immobilization of the oxo-vanadium phthalocyanine via covalent attachment to the nano magnetic core-shell is an interesting approach to facilitate catalyst recovery, recycling, reusing and to reduce effluent contamination. In this study, we wish to report synthesis and characterise dendrimer oxo-vanadium phthalocyanine and its application as a heterogeneous and recycle nano catalyst in the synthesis of 3,4-Dihydropyrano[c]chromene at room temperature. The scope and limitation of the described procedure will be presented