Host(nanocavity of zeolite-Y)/guest(12-and 14-membered azamacrocyclic Ni(II)complexes)nanocatalyst:synthesis,characterization and catalytic oxidation of cyclohexene with molecular oxygen

摘要

Ni(II)complexes of[12]aneN4:1,4,7,10-tetraazacyclododecane-2,3,8,9-tetraone;[14]aneN4:1,4,8,11-tetraazacyclotetradecane-2,3,9,10-tetraone;Bzo2[12]ane N4:dibenzo-1,4,7,10-tetraazacyclododecane-2,3,8,9-tetraone and Bzo2[14]aneN4:dibenzo-1,4,8,11-tetraazacyclote-tradecane-2,3,9,10-tetraone have been encapsulated in the nanopores of zeolite-Y by a two-step process in the liquid phase:(i)adsorption of[bis(diamine)nickel(II)];[Ni(N-N)2]-NaY;in the supercages of the zeolite,and(ii)in situ condensation of the nickel(II)precursor complex with di-ethyloxalate.The new host-guest nanocatalyst(HGN)were characterized by several techniques:chemical analysis and spectroscopic methods(FT-IR,UV/Vis,XRD,BET,DRS)and then were used for oxidation of cyclohexene with molecular oxygen.