首页|Vanadium(V)complexes supported on porous MIL-lOO(Fe)as catalysts for the selective oxidation of toluene
Vanadium(V)complexes supported on porous MIL-lOO(Fe)as catalysts for the selective oxidation of toluene
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
The vanadium(V)complexes bearing the aroylhydrazone Schiff base 2-hydroxy-N'-((2-hydroxynaphthalen-1-yl)methylene)benzohydrazide ligand[VO(OMe)L](1)and[EtsNH][VO2L](2)were synthesized,characterized and supported on porous MIL-lOO(Fe)forming the 1@MIL-100(Fe)and 2@MIL-100(Fe)composites.The outcome of such immobilizations was assessed by several characterization techniques,namely powder X-ray diffraction,UV/Vis,FTIR,SEM-EDS,ICP and BET surface area analysis,confirming the successful heterogenization of both vanadium complexes.They were screened as catalysts towards the oxidation of toluene,under homogenous(1 and 2)and heterogeneous(1@MIL-100 and 2@MIL-100)conditions.The influence of several parameters,namely the type and amount of catalyst or oxidant,reaction time,temperature,and radical trapping,was studied.The main products obtained were benzaldehyde,benzyl alcohol and benzoic acid.Under the optimized conditions,using 1 and 2 as homogeneous catalysts,total yields of 19 and 23%,respectively,were achieved at 80 ℃ after 6 h.Using l@MIL100(Fe)and 2@MIL100(Fe)composites under heterogeneous conditions,total yields up to 11% after 24 h,were achieved.
Centro de Quimica Estrutural Institute of Molecular Sciences,Instituto Superior Tecnico,Universidade de Lisboa,Av.Rovisco Pais,1049-001,Lisboa,Portugal
NSTL
