Nano-Hydroxyapatite S upported MoO۲(acac) : Structure Cha racteriza tion and Catalysis for Cyclooctene Epox idation

Cataly tic ole¿n e poxidation in the liquid phase is an important topic for the synthesis of fine chemicals, becau e of their versatility as intermedi ates, epoxies are of gr eat value in both synthe tic organic chemistry and chemical technology [۱]. M any soluble metal sa lts or complexes have been found to be active catalysts in this reaction during the last few dec ades. Recently, soluble compounds of early tra nsition metals such as rh enium , titanium , vanadium,manga nese and molybdenu m have bee n used for alkene epoxidation [۲-۳ ]. In the ca se of molybdenum-containing co mplexes, oxomolybden um specie s have been particularly investigated because of their good ca talytic activity for selective oxidation. Different appro aches have b een used for immobilization of mol ybdenum c omplexes on various sup ports to obtain heterogeneous catalysts. Sherrington and coworkers have reported efficient epoxi dation of alk enes with t ert-butyl hy droperoxide catalyzed by reusable Mo(VI) supp orted on imidazole cont aining polymers. Hydr oxyapatite [Ca۱۰(PO۴)۳( OH)۲], (HAP) materials have been o f great inter est because of their min eral components being similar to h uman hard ti ssues [۴].

کلیدواژه ها:

nano-hydroxyapatite(HAP) ، catalyst ، molybdenum ، epoxidation