This study is divided to four section. First of all, immobilized Mn and Co porphyrin- based catalysts supported on chitosan with 10:1 molar ratio were synthesized. Then, their characterizations and morphologies investigated by different techniqus such as FT-IR, UV-Vis, TGA, FESEM and ICP.Their catalytic application were examined in the oxidation reaction of ethylbenzene, therefore in optimized conditions for temperature, time and amount of oxidant. We achieved to high conversion and selectivity to acetophenone product. In the second part of project, due to porphyrin chelation ability towards different transition metals, a palladium based catalyst was prepared and characterized with same techniques sach as TGA, UV-Vis, ICP, FT-IR and XRD. Recent catalyst applied for C-C coupling such as Suzuki and Sonogashira reactions. This catalyst in modified conditions, was showed high conversion in coupling reactions. In the third section, surface of chitosan modified with carboxy methyl group and iron magnetic nanoparticles, and then a nanocomposite was prepared for future drug delivery and MRI imaging. Finaly a porphyrin compound with ferrocene substitution and Cu complexes was synthesized. Then Cu(II) Meso-tetraferrocenylporphyrin supported on modified graphene was prepared as a sensor based surface modified graphene oxide and its reduction to modified graphene with amine groups.This sensor investigated by using TGA, UV-Vis, FT-IR techniques. Then we applied this sensor for Hydrogenperoxide.